JavaWeb流行框架（代码案例）

Struts2基础

通过Struts2将请求转发到指定JSP页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>主页</title>
</head>
<body>4
    <a href="first.jsp">请求 Struts2</a>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>第一个Struts程序</title>
</head>
<body>
    第一个Struts程序
</body>
</html>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         id="WebApp_ID" version="2.5">
    <display-name>8.1</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <!-- Struts2过滤器 -->
    <filter>
        <!-- 过滤器名称 -->
        <filter-name>struts2</filter-name>
        <!-- 过滤器类 -->
        <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <!-- Struts2过滤器映射 -->
    <filter-mapping>
        <!-- 过滤器名称 -->
        <filter-name>struts2</filter-name>
        <!-- 过滤器映射 -->
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
	"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
	<!-- 声明包 -->
    <package name="myPackage" extends="struts-default">
    	<!-- 定义action -->
    	<action name="first">
    		<!-- 添加成功的映射页面 -->
    		<result>/first.jsp</result>
    	</action>
    </package>
</struts>

应用Struts2提供的动态Action，处理添加用户信息请求及更新用户信息请求

<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
	"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
	<!-- 声明包 -->
    <package name="myPackage" extends="struts-default">
    	<!-- 定义action -->
    	<action name="userAction" class="com.wgh.UserAction">
    		<!-- 添加成功的映射页面 -->
		<result name="add">user_add.jsp</result>
		<result name="update">user_update.jsp</result>
    	</action>
    </package>
</struts>


package com.wgh;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {
    private static final long serialVersionUID=1L;
    private String info;
    public String add() throws Exception{
        info="添加用户信息";
        return "add";
    }
    public String update() throws Exception{
        info="更新用户信息";
        return "update";
    }
    public String getInfo(){
        return info;
    }
    public void setInfo(String info){
        this.info=info;
    }
}

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>主页</title>
</head>
<body>
    <a href="user_add.jsp">添加用户</a>
    <br>
    <a href="user_update.jsps">更新用户</a>
</body>
</html>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>第一个Struts程序</title>
</head>
<body>
                <front color="red">
                    <s:property value="info/"></s:property>
                </front>
</body>
</html>

编写一个Action对象，处理对表单提交的数据，模拟实现对指定用户的问候

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>主页</title>
    <style type="text/css">
        *{font-size: 12px;}
    </style>
</head>
<body>
<form action="GreetingAction.java" method="post">
    请输入你的姓名：<label>
    <input type="text" name="username">
</label>
    <input type="submit" value="提交">
</form>
</body>
</html>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
	"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<!-- 声明包 -->
    <package name="myPackage" extends="struts-default" >
    	<!-- 定义action -->

    	<action name="greeting" class="com.wgh.GreetingAction" >
    		<!-- 定义成功的映射页面 -->
    		<result name="success">success.jsp</result>
    		<!-- 定义失败的映射页面 -->
    		<result name="error">error.jsp</result>
    	</action>
    </package>
</struts>
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>
            org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter
        </filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>*.action</url-pattern>
    </filter-mapping></web-app>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>错误</title>
</head>
<body>
<font color="red">错误：您没有输入姓名！</font>
</body>
</html>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>欢迎</title>
    <style type="text/css">
        *{font-size: 12px;}
    </style>
</head>
<body>
<form color="red">
    <s:property value="username"/>
</form>
，您好！
<br>
欢迎使用来到本站
</body>
</html>
package com.wgh;

import com.opensymphony.xwork2.ActionSupport;

public class GreetingAction extends ActionSupport {
    private static final long serialVersionUID=1L;
    private String username;
    public String execute() throws Exception{
        if (username==null||"".equals(username)){
            return ERROR;
        }else {
            return SUCCESS;
        }
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }
}

通过ActionContext对象获取Map类型的request，session和application，分别为这3个对象设置一个info属性并赋值，然后在JSP页面获取3中作用域下的info属性信息

package com.wgh;


import java.util.Map;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
 * @author Li Yongqiang
 * Map类型的request、session、application
 */
public class TestAction extends ActionSupport {

    private static final long serialVersionUID = 1L;
    // Map类型的request
    private Map<String, Object> request;
    // Map类型的session
    private Map<String, Object> session;
    // Map类型的application
    private Map<String, Object> application;
    // 构造方法
    @SuppressWarnings("unchecked")
    public TestAction(){
        // 获取ActionContext对象
        ActionContext context = ActionContext.getContext();
        // 获取Map类型的request
        request = (Map<String, Object>) context.get("request");
        // 获取Map类型的session
        session = context.getSession();
        // 获取Map类型的application
        application = context.getApplication();
    }
    /**
     * 请求处理方法
     * @return String
     */
    public String execute() throws Exception{
        // 字符串信息
        String info = "明日科技";
        // 向request添加信息
        request.put("info", info);
        // 向session添加信息
        session.put("info", info);
        // 向application添加信息
        application.put("info", info);
        // 成功返回
        return SUCCESS;
    }
}
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
	"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<constant name="struts.devMode" value="true"></constant>
	<!-- 声明包 -->
    <package name="myPackage" extends="struts-default" >
    	<!-- 定义action -->

    	<action name="testAction" class="com.wgh.TestAction" >
    		<!-- 定义成功的映射页面 -->
    		<result name="success">success.jsp</result>
    	</action>
    </package>
</struts>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>欢迎</title>
    <style type="text/css">
        *{font-size: 12px;}
    </style>
</head>
<body>
request范围内的info值：
<font color="red"><%=request.getAttribute("info")%></font>
<br>
session范围内的info值：
<font color="red"><%=session.getAttribute("info")%></font>
<br>
application范围内的info值：
<font color="red"><%=application.getAttribute("info")%></font>
<br>
</body>
</html>
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         id="WebApp_ID" version="2.5">
    <display-name>8.2</display-name>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list><!-- Struts2过滤器 -->
    <filter>
        <!-- 过滤器名称 -->
        <filter-name>struts2</filter-name>
        <!-- 过滤器类 -->
        <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <!-- Struts2过滤器映射 -->
    <filter-mapping>
        <!-- 过滤器名称 -->
        <filter-name>struts2</filter-name>
        <!-- 过滤器映射 -->
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>主页</title>
    <style type="text/css">
        *{font-size: 12px;}
    </style>
</head>
<body>
<a href="testAction.action">Map类型的request、session、application</a>
<br>
</body>
</html>

struts2技术进阶

通过OGNL操作普通的属性与方法

package com.wgh;

public class Student {
    private int id;
    private String name;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    public String say(){
        return "我是一个学生";
    }
}
}
package com.wgh;

import java.util.Map;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
 * @author Li Yongqiang
 * Map类型的request、session、application
 */
public class OGNLAction extends ActionSupport {

    private static final long serialVersionUID = 1L;
    private String name;
    private Student student;
    Map<String,Object> request;
    @SuppressWarnings("unchecked")
    public OGNLAction(){
        student=new Student();
        student.setId(1);
        student.setName("张三");
        name="tom";
        request=(Map<String,Object>) ActionContext.getContext().get("request");
    }
    /**
     * 请求处理方法
     * @return String
     */
    public String execute() throws Exception{
        request.put("info","request测试");
        return SUCCESS;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Student getStudent() {
        return student;
    }

    public void setStudent(Student student) {
        this.student = student;
    }

    public Map<String, Object> getRequest() {
        return request;
    }

    public void setRequest(Map<String, Object> request) {
        this.request = request;
    }
}
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>欢迎</title>
    <style type="text/css">
        *{font-size: 12px;}
    </style>
</head>
<body>
    <div>
        <h1>操作普通属性</h1>
        属性name的值：<s:property value="name"/>
        <br><hr>
        学号：<s:property value="student.id"/><br>
        姓名：<s:property value="student.name"/><br>
        <s:property value="student.say()"/>
        <br><hr>
        request中的info值：<s:property value="student.say()"/>
    </div>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>主页</title>
    <style type="text/css">
        *{font-size: 12px;}
    </style>
</head>
<body>
<a href="ognl.action">测试</a>
<br>
</body>
</html>

为Action对象配置输出执行时间的拦截器，查看执行Action所需要的时间

package com.wgh;

import com.opensymphony.xwork2.ActionSupport;

public class TestAction extends ActionSupport {
    private static final long serialVersionUID = 1L;
    public String execute() throws Exception{
        Thread.sleep(1000);
        return SUCCESS;
    }
}

<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
	"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<constant name="struts.devMode" value="true"/>
	<constant name="struts.confriguration.xml.reload" value="true"/>
	<!-- 声明包 -->
    <package name="myPackage" extends="struts-default" >
    	<!-- 定义action -->

    	<action name="testAction" class="com.wgh.TestAction" >
			<interceptor-ref name="timer"/>
				<result name="success">success.jsp</result>
    	</action>
    </package>
</struts>

<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>成功</title>
</head>
<body>
测试成功，请查看控制台程序的用时
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>主页</title>
    <style type="text/css">
        *{font-size: 12px;}
    </style>
</head>
<body>
<a href="testAction.action">ceshi</a>
<br>
</body>
</html>

通过Struts2框架提供的表单标签编写用户注册表单

<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>主页</title>
    <style type="text/css">
        *{font-size: 12px;}
    </style>
</head>
<body>
    <h2>用户注册</h2>
    <s:form action="TestAction!register" method="post">
        <s:textfield name="name" label="用户名" required="true" requiredposition="left"></s:textfield>
        <s:password name="password" label="密码" required="true" requiredposition="left"></s:password>
        <s:select list="{'请选择省份','吉林','广东','山东','河南'}" name="province" label="省份"></s:select>
        <s:checkboxlist list="{'足球','篮球','羽毛球','乒乓球'}" name="hobby" label="爱好"></s:checkboxlist>
        <s:textarea name="description" cols="30" rows="5" label="描述"></s:textarea>
        <s:submit value="注册"></s:submit>
        <s:reset value="重置"></s:reset>
    </s:form>
</body>
</html>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>成功</title>
</head>
<body>
<div>
    <h2>用户注册信息</h2>
    <ul>
        <li>用户名：<s:property value="name" /></li>
        <li>密码：<s:property value="password" /></li>
        <li>省份：<s:property value="province" /></li>
        <li>爱好： <s:property value="hobby" /></li>
        <li>描述：<s:property value="description" /></li>
    </ul>
</div>
</body>

</html>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
	"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<constant name="struts.devMode" value="true"/>
	<!-- 声明包 -->
    <package name="myPackage" extends="struts-default" >
    	<!-- 定义action -->

    	<action name="testAction" class="com.wgh.TestAction" >
				<result>success.jsp</result>
    	</action>
    </package>
</struts>
package com.wgh;

import com.opensymphony.xwork2.ActionSupport;

public class TestAction extends ActionSupport {
    private static final long serialVersionUID = 1L;
    private String name;
    private String password;

    private String description;

    private int sex = 0;

    private String province;

    private String hobby;

    public String execute() throws Exception {

        return SUCCESS;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public int getSex() {
        return sex;
    }

    public void setSex(int sex) {
        this.sex = sex;
    }

    public String getProvince() {
        return province;
    }

    public void setProvince(String province) {
        this.province = province;
    }

    public String getHobby() {
        return hobby;
    }

    public void setHobby(String hobby) {
        this.hobby = hobby;
    }
}

使用验证框架对数据校验

package com.wgh;


import com.opensymphony.xwork2.ActionSupport;
public class UserAction extends ActionSupport{
    private static final long serialVersionUID = 1L;
    private String username;// 用户名
    private String password;// 密码
    // 用户登录
    @Override
    public String execute() throws Exception {
        return SUCCESS;
    }
    public String getUsername() {
        return username;

    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
        "-//OpenSymphony Group//XWork Validator 1.0.3//EN"
        "http://www.opensymphony.com/xwork/xwork-validator-1.0.3.dtd" >
<validators>
    <!-- 验证用户名 -->
    <field name="username">
        <field-validator type="requiredstring">
            <message>请输入用户名</message>
        </field-validator>
    </field>
    <!-- 验证密码 -->
    <field name="password">
        <field-validator type="requiredstring">
            <message>请输入密码</message>
        </field-validator>
    </field>
</validators>

<!DOCTYPE struts PUBLIC	"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
		"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<!-- 声明包 -->
	<package name="myPackge" extends="struts-default">
		<!-- 配置UserAction -->
		<action name="userAction" class="com.wgh.UserAction">
			<!-- 用户登录页面 -->
			<result name="input">/login.jsp</result>
			<!-- 注册成功页面 -->
			<result>/success.jsp</result>
		</action>
	</package>
</struts>

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>用户登录</title>
</head>
<body>
<s:form action="userAction" method="post">
    <s:textfield name="username" label="用户名" required="true"></s:textfield>
    <s:password name="password" label="密码" required="true"></s:password>
    <s:submit key="submit" value="登录"></s:submit>
</s:form>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>登录成功</title>
</head>
<body>
<h2>
    <s:property value="username"/>，登录成功
</h2>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>用户登录</title>
    <style type="text/css">
        *{font-size: 12px;}
    </style>
</head>
<body>
<s:form action="userAction" method="post">
    <s:textfield name="username" label="用户名" required="true"></s:textfield>
    <s:password name="password" label="密码" required="true"></s:password>
    <s:submit key="submit" value="登录"></s:submit>
</s:form>
</body>
</html>

HIbernate技术

向数据库中的产品信息表添加产品信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <!-- 数据库驱动 -->
    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
    <!-- 数据库连接的URL -->
    <property name="connection.url">jdbc:mysql://localhost:3306/db_database10</property>
    <!-- 数据库连接用户名 -->
    <property name="connection.username">root</property>
    <!-- 数据库连接密码 -->
    <property name="connection.password">986</property>
    <!-- Hibernate方言 -->
    <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
    <!-- 打印SQL语句 -->
    <property name="show_sql">true</property>
    <!-- 映射文件  -->
    <mapping resource="com/mr/product/Product.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 产品信息字段配置信息 -->
<hibernate-mapping>
    <class name="com.mr.product.Product" table="tab_product1">
        <!-- id值 -->
        <id name="id" column="id" type="int">
            <generator class="native"/>
        </id>
        <!-- 产品名称 -->
        <property name="name" type="string" length="45">
            <column name="name"/>
        </property>
        <!-- 产品价格 -->
        <property name="price" type="double">
            <column name="price"/>
        </property>
        <!-- 生产厂商 -->
        <property name="factory" type="string" length="45">
            <column name="factory"/>
        </property>
        <!-- 备注 -->
        <property name="remark" type="string" length="100">
            <column name="remark"/>
        </property>
    </class>
</hibernate-mapping>
package com.mr.product;
/**
 * 商品信息的持久化类
 */
public class Product {

    private Integer id;//唯一性标识
    private String name;//产品名称
    private Double price;//产品价格
    private String factory;//生产商
    private String remark;//备注

    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Double getPrice() {
        return price;
    }
    public void setPrice(Double price) {
        this.price = price;
    }
    public String getFactory() {
        return factory;
    }
    public void setFactory(String factory) {
        this.factory = factory;
    }
    public String getRemark() {
        return remark;
    }
    public void setRemark(String remark) {
        this.remark = remark;
    }
}
package com.mr.main;

import org.hibernate.Session;

import com.mr.hibernate.HibernateInitialize;
import com.mr.product.Product;

public class AddProduct {

    /**
     * 添加商品
     */
    public static void main(String[] args) {
        Session session = null;			//声明Session对象
        Product product = new Product();//实例化持久化类
        //为持久化类属性赋值
        product.setName("Java Web编程宝典");//设置产品名称
        product.setPrice(79.00);//设置产品价格
        product.setFactory("明日科技1");//设置生产商
        product.setRemark("无");//无
        //Hibernate的持久化操作
        try {
            session = HibernateInitialize.getSession();//获取Session
            session.beginTransaction();//开启事务
            session.save(product);//执行数据库添加操作
            session.getTransaction().commit();//事务提交
        } catch (Exception e) {
            session.getTransaction().rollback();//事务回滚
            System.out.println("数据添加失败");
            e.printStackTrace();
        }finally{
            HibernateInitialize.closeSession();//关闭Session对象
        }
    }
}

package com.mr.hibernate;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
/**
 * Hibernate初始化类
 *
 */
public class HibernateInitialize {
    private static ThreadLocal<Session> threadLocal = null;//ThreadLocal对象
    private static SessionFactory sessionFactory = null;//SessionFactory对象
    //静态块
    static {
        try {
            // 加载Hibernate配置文件
            Configuration cfg = new Configuration().configure();
            threadLocal = new ThreadLocal<Session>();//ThreadLocal对象
            sessionFactory = cfg.buildSessionFactory();
        } catch (Exception e) {
            System.err.println("创建会话工厂失败");
            e.printStackTrace();
        }
    }
    /**
     *	获取Session
     *  @return Session
     *  @throws HibernateException
     */

    public static Session getSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        if (session == null || !session.isOpen()) {
            if (sessionFactory == null) {
                rebuildSessionFactory();
            }
            session = (sessionFactory != null) ? sessionFactory.openSession(): null;
            threadLocal.set(session);
        }
        return session;
    }
    /**
     * 重建会话工厂
     */
    public static void rebuildSessionFactory() {
        try {
            // 加载Hibernate配置文件
            Configuration cfg = new Configuration().configure();
            sessionFactory = cfg.buildSessionFactory();
        } catch (Exception e) {
            System.err.println("创建会话工厂失败");
            e.printStackTrace();
        }
    }
    /**
     * 获取SessionFactory对象
     * @return SessionFactory对象
     */
    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }
    /**
     *	关闭Session
     *  @throws HibernateException
     */
    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);
        if (session != null) {
            session.close();//关闭Session
        }
    }
}
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
    <display-name>10.3</display-name>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>
</web-app>

利用get（）方法加载Product对象

package com.mr.main;

import org.hibernate.Session;

import com.mr.hibernate.HibernateInitialize;
import com.mr.product.Product;

public class GetProduct {
    //利用get()方法装载对象
    public static void main(String[] args){
        Session session = null;			//声明Session对象
        try {
            //Hibernate的持久化操作
            session = HibernateInitialize.getSession();//获取Session
            Product product = (Product) session.get(Product.class, new Integer("1"));//装载对象
            System.out.println("产品ID："+product.getId());
            System.out.println("产品名称："+product.getName());
            System.out.println("产品价格："+product.getPrice()+"元");
            System.out.println("生产厂商："+product.getFactory());
            System.out.println("产品备注："+product.getRemark());
        } catch (Exception e) {
            System.out.println("对象装载失败");
            e.printStackTrace();
        } finally{
            HibernateInitialize.closeSession();//关闭Session
        }
    }

}

利用delete（）方法删除指定的产品信息

package com.mr.main;

import javax.transaction.Transactional;

import org.hibernate.Session;

import com.mr.hibernate.HibernateInitialize;
import com.mr.product.Product;

public class DeleteProduct {

    //删除指定产品信息

    public static void main(String[] args) {
        Session session = null;			//声明Session对象
        try {
            //Hibernate的持久化操作
            session = HibernateInitialize.getSession();//获取Session
            session.beginTransaction();
            Product product = (Product) session.get(Product.class, new Integer("1"));//装载对象
            session.delete(product);//删除持久化信息
            session.flush();//强制刷新提交

        } catch (Exception e) {
            System.out.println("对象删除失败");
            e.printStackTrace();
        } finally{
            HibernateInitialize.closeSession();//关闭Session
        }
    }

}

修改指定的产品信息

package com.mr.main;

import org.hibernate.Session;

import com.mr.hibernate.HibernateInitialize;
import com.mr.product.Product;

public class UpdateProduct {

    //修改指定产品信息
    public static void main(String[] args) {
        Session session = null;			//声明Session对象
        try {
            //Hibernate的持久化操作
            session = HibernateInitialize.getSession();//获取Session
            session.beginTransaction();
            Product product = (Product) session.load(Product.class, new Integer("1"));//装载对象
            product.setName("Java Web编程");//修改商品名称
            product.setRemark("无1");//修改备注信息
            session.update(product );
            session.flush();
        } catch (Exception e) {
            System.out.println("对象修改失败");
            e.printStackTrace();
        } finally{
            HibernateInitialize.closeSession();//关闭Session
        }
    }

}

Hibernate技术进阶

 

建立产品对象与生产商对象的多对一单向关联，并利用映射关系查询完整的图书信息

package com.mr.product;

import com.mr.factory.Factory;

import javax.persistence.Convert;
import javax.persistence.ManyToOne;
import javax.persistence.Transient;

/**
 * 商品信息的持久化类
 */
public class Product {

    private Integer id;//唯一性标识
    private String name;//产品名称
    private Double price;//产品价格
    private Factory factory;//关联的生产商

    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Double getPrice() {
        return price;
    }
    public void setPrice(Double price) {
        this.price = price;
    }
    @Convert
    public Factory getFactory() {
        return factory;
    }
    public void setFactory(Factory factory) {
        this.factory = factory;
    }
}

package com.mr.main;

import org.hibernate.Session;

import com.mr.factory.Factory;
import com.mr.hibernate.HibernateInitialize;
import com.mr.product.Product;

public class SelectProduct {
    public static void main(String[] args) {
        Session session = null;			//声明第一个Session对象
        try {
            //Hibernate的持久化操作
            session = HibernateInitialize.getSession();//获取Session
            session.beginTransaction();//事务开启
            Product product = (Product) session.get(Product.class, new Integer("1"));//装载对象
            System.out.println("产品名称："+product.getName());
            System.out.println("产品价格："+product.getPrice()+"元");
            System.out.println("生产商："+product.getFactory().getFactoryName());
            session.getTransaction().commit();//事务提交
        } catch (Exception e) {
            e.printStackTrace();
            session.getTransaction().rollback();//事务回滚
        } finally{
            HibernateInitialize.closeSession();//关闭Session
        }
    }
}

建立公民对象与身份证对象的一对一主键关联

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 <!-- 公民身份证字段信息配置信息 -->
 <hibernate-mapping>
 	<class name="com.mr.idcard.IDcard" table="tab_idcard">
 		<!-- id值 -->
 		<id name="id" column="id" type="int">
			<!-- 外键生成 -->
			<generator class="foreign">
				<param name="property">people</param>
			</generator>
		</id>
		<!-- 公民身份证号 -->
		<property name="idcard_code" type="string" length="45" not-null="true">
			<column name="IDcard_code"/>
		</property>
 	</class>
 </hibernate-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 <!-- 公民信息字段配置信息 -->
 <hibernate-mapping>
 	<class name="com.mr.people.People" table="tab_people">
 		<!-- id值 -->
 		<id name="id" column="id" type="int">
			<generator class="native"/>
		</id>
		<!-- 公民姓名 -->
		<property name="name" type="string" length="45">
			<column name="name"/>
		</property>
		<!-- 公民性别 -->
		<property name="sex" type="string" length="2">
			<column name="sex"/>
		</property>
		<!-- 公民年龄 -->
		<property name="age" type="int">
			<column name="age"/>
		</property>
		<!-- 一对一映射 -->
		<one-to-one name="idcard" class="com.mr.idcard.IDcard"
			cascade="all"/>
 	</class>
 </hibernate-mapping>

建立公民对象与身份证对象的一对一外键关联关系
 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 <!-- 公民信息字段配置信息 -->
 <hibernate-mapping>
 	<class name="com.mr.people.People" table="tab_people">
 		<!-- id值 -->
 		<id name="id" column="id" type="int">
			<generator class="native"/>
		</id>
		<!-- 公民姓名 -->
		<property name="name" type="string" length="45">
			<column name="name"/>
		</property>
		<!-- 公民性别 -->
		<property name="sex" type="string" length="2">
			<column name="sex"/>
		</property>
		<!-- 公民年龄 -->
		<property name="age" type="int">
			<column name="age"/>
		</property>
		<!-- 一对一映射 -->
		<many-to-one name="idcard" unique="true">
			<column name="card_id"/>
		</many-to-one>
 	</class>
 </hibernate-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 <!-- 公民身份证字段信息配置信息 -->
 <hibernate-mapping>
 	<class name="com.mr.idcard.IDcard" table="tab_idcard">
 		<!-- id值 -->
 		<id name="id" column="id" type="int">
			<generator class="native"/>
		</id>
		<!-- 公民身份证号 -->
		<property name="idcard_code" type="string" length="45" not-null="true">
			<column name="IDcard_code"/>
		</property>
 	</class>
 </hibernate-mapping>

建立用户对象与权限对象的多对多关联关系，查询用户admin所拥有的权限，以及权限“新闻管理员”被赋予了哪些用户

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Role实体对象 -->
<hibernate-mapping>
    <class name="com.mr.role.Role" table="tab_role">
        <!-- 主键id -->
        <id name="id">
            <generator class="native"/>
        </id>
        <!-- 权限名称 -->
        <property name="roleName" not-null="true">
            <column name="rolename"/>
        </property>
        <set name="users" table="tab_mapping">
            <key column="role_id"></key>
            <many-to-many class="com.mr.user.User" column="user_id"/>
        </set>
    </class>
</hibernate-mapping>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- User实体对象 -->
<hibernate-mapping>
    <class name="com.mr.user.User" table="tab_user">
        <!-- 主键id -->
        <id name="id">
            <generator class="native"/>
        </id>
        <!-- 用户名称 -->
        <property name="name" not-null="true" />
        <set name="roles" table="tab_mapping">
            <key column="user_id"></key>
            <many-to-many class="com.mr.role.Role" column="role_id"/>
        </set>
    </class>
</hibernate-mapping>


package com.mr.main;

import java.util.Iterator;
import java.util.Set;

import org.hibernate.Session;

import com.mr.hibernate.HibernateInitialize;
import com.mr.role.Role;
import com.mr.user.User;

public class Manger {
    public static void main(String[] args) {
        Session session = null;			//声明一个Session对象
        try {
            //Hibernate的持久化操作
            session = HibernateInitialize.getSession();//获取Session
            session.beginTransaction();//事务开启
            User user = (User)session.get(User.class, new Integer("1"));//装载用户对象
            Set<Role> roles= user.getRoles();//获取权限名称集合
            System.out.println(user.getName()+"用户所拥有的权限为：");
            //通过迭代输出权限信息
            for (Iterator<Role> it = roles.iterator(); it.hasNext();) {
                Role roles2 = (Role) it.next();
                System.out.print(roles2.getRoleName()+"||");
            }
            System.out.println();//换行
            Role rol = (Role)session.get(Role.class, new Integer("2"));
            Set<User> users = rol.getUsers();//获取用户名称集合
            System.out.println(rol.getRoleName()+"权限被赋予用户：");
            //通过迭代输出用户信息
            for (Iterator<User> it = users.iterator(); it.hasNext();) {
                User users2 = (User) it.next();
                System.out.print(users2.getName()+"||");
            }
            session.getTransaction().commit();//事务提交
        } catch (Exception e) {
            e.printStackTrace();
            session.getTransaction().rollback();//事务回滚
        } finally{
            HibernateInitialize.closeSession();//关闭Session
        }
    }
}

利用级联操作删除公民表中的信息和其在身份证表中所关联的信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 <!-- 公民信息字段配置信息 -->
 <hibernate-mapping>
 	<class name="com.mr.people.People" table="tab_people">
 		<!-- id值 -->
 		<id name="id" column="id" type="int">
			<generator class="native"/>
		</id>
		<!-- 公民姓名 -->
		<property name="name" type="string" length="45">
			<column name="name"/>
		</property>
		<!-- 公民性别 -->
		<property name="sex" type="string" length="2">
			<column name="sex"/>
		</property>
		<!-- 公民年龄 -->
		<property name="age" type="int">
			<column name="age"/>
		</property>
		<!-- 一对一映射 -->
		<one-to-one name="idcard" class="com.mr.idcard.IDcard" cascade="delete"/>
 	</class>
 </hibernate-mapping>

package com.mr.main;

import org.hibernate.Session;

import com.mr.hibernate.HibernateInitialize;
import com.mr.people.People;

public class Manger {
	public static void main(String[] args) {
		Session session = null;// 声明一个Session对象
		try {
			// Hibernate的持久化操作
			session = HibernateInitialize.getSession();// 获取Session
			session.beginTransaction();// 事务开启
			People people = (People)session.load(People.class, new Integer("1"));//装载公民对象
			session.delete(people);//删除装载的公民对象
			session.getTransaction().commit();// 事务提交
		} catch (Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();// 事务回滚
		} finally {
			HibernateInitialize.closeSession();// 关闭Session
		}
	}
}

将类继承树映射成一张表，并向这个数据表中添加两个不同实体对象的信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 继承树的映射配置 -->
<hibernate-mapping package="com.mr.person">
    <class name="Person" table="tab_person">
        <id name="id">
            <generator class="native"/>
        </id>
        <!-- 声明一个鉴别器 -->
        <discriminator column="type" type="string"/>
        <!-- 映射自有属性 -->
        <property name="name" not-null="true"/>
        <property name="age" type="int"/>
        <property name="sex" type="string"/>
        <!-- 声明子类Student -->
        <subclass name="Student" discriminator-value="学生">
            <property name="school"/>
        </subclass>
        <!-- 声明子类Staffer -->
        <subclass name="Staffer" discriminator-value="职员">
            <property name="company"/>
        </subclass>
    </class>
</hibernate-mapping>

package com.mr.main;

import org.hibernate.Session;

import com.mr.hibernate.HibernateInitialize;
import com.mr.person.Staffer;
import com.mr.person.Student;

public class AddPerson {
    public static void main(String[] args) {
        Session session = null;// 声明一个Session对象
        HibernateInitialize hi = new HibernateInitialize();
        try {
            // Hibernate的持久化操作
            session = hi.getSession();// 获取Session
            session.beginTransaction();// 事务开启
            Student student = new Student();//声明学生的实体对象
            student.setName("小明");
            student.setAge(12);
            student.setSex("男");
            student.setSchool("明日希望小学");
            session.save(student);//保存学生信息
            Staffer staffer = new Staffer();
            staffer.setName("小红");
            staffer.setAge(25);
            staffer.setSex("女");
            staffer.setCompany("明日科技");
            session.save(staffer);//保存职员信息
            session.getTransaction().commit();// 事务提交
        } catch (Exception e) {
            e.printStackTrace();
            session.getTransaction().rollback();// 事务回滚
        } finally {
            hi.closeSession();// 关闭Session
        }
    }
}

将继承Person对象的每个子类Student和Staffer映射成一张表，并向数据表中添加两个不同实体对象的信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 <!-- 继承树的映射配置 -->
 <hibernate-mapping package="com.mr.person">
 	<class name="Person" table="tab_person1">
 		<id name="id">
			<generator class="native"/>
		</id>
 		<!-- 映射自有属性 -->
		<property name="name" not-null="true"/>
		<property name="age" type="int"/>
 		<property name="sex" type="string"/>
 		<!-- 映射子类Student -->
		<joined-subclass name="Student" table="tab_student">
			<key column="id"/>
			<property name="school"/>
		</joined-subclass>
		<!-- 映射子类Staffer -->
		<joined-subclass name="Staffer" table="tab_staffer">
			<key column="id" />
			<property name="company"/>
		</joined-subclass>
 	</class>
 </hibernate-mapping>

将每个具体类Student和Staffer映射成一张表，并向每个数据表中添加两个不同的实体对象的信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 <!-- 继承树的映射配置 -->
 <hibernate-mapping package="com.mr.person">
 	<class name="Person" abstract="true">
 		<id name="id">
			<!-- 主键生成策略为手动分配 -->
			<generator class="assigned"/>
		</id>
 		<!-- 映射自有属性 -->
		<property name="name" not-null="true"/>
		<property name="age" type="int"/>
 		<property name="sex" type="string"/>
 		<!-- 映射子类Student -->
		<union-subclass name="Student" table="tab_student2">
			<property name="school"/>
		</union-subclass>
		<!-- 映射子类Staffer -->
		<union-subclass name="Staffer" table="tab_staffer2">
			<property name="company"/>
		</union-subclass>
 	</class>
 </hibernate-mapping>

Spring核心之IOC

通过Spring的赋值为用户JavaBean的属性赋值

package com.mr.user;

public class User {

    private String name;//用户姓名
    private Integer age;//年龄
    private String sex;//性别

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
}
package com.mr.main;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

import com.mr.user.User;

public class Manger {

    public static void main(String[] args) {
        Resource resource = new ClassPathResource("applicationContext.xml");            //装载配置文件
        BeanFactory factory = new XmlBeanFactory(resource);
        User user = (User) factory.getBean("user");                                    //获取Bean
        System.out.println("用户姓名——"+user.getName());//输出用户的姓名
        System.out.println("用户年龄——"+user.getAge());//输出用户的年龄
        System.out.println("用户性别——"+user.getSex());//输出用户的性别
    }
}
<?xml version="1.0" encoding="UTF-8"?>
<beans
        xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
    <!-- User Bean -->
    <bean name="user" class="com.mr.user.User">
        <property name="name">
            <value>小强</value>
        </property>
        <property name="age">
            <value>26</value>
        </property>
        <property name="sex">
            <value>男</value>
        </property>
    </bean>
</beans>

通过Spring的构造器注入为用户JavaBean的属性信息赋值

package com.mr.user;

public class User {

    private String name;//用户姓名
    private Integer age;//年龄
    private String sex;//性别
    //构造方法
    public User(String name,Integer age,String sex){
        this.name=name;
        this.age=age;
        this.sex=sex;
    }
    //输出JavaBean的属性值方法
    public void printInfo(){
        System.out.println("用户姓名——"+name);//输出用户的姓名
        System.out.println("用户年龄——"+age);//输出用户的年龄
        System.out.println("用户性别——"+sex);//输出用户的性别
    }
}
package com.mr.main;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

import com.mr.user.User;

public class Manger {

    public static void main(String[] args) {
        Resource resource = new ClassPathResource("applicationContext.xml");            //装载配置文件
        BeanFactory factory = new XmlBeanFactory(resource);
        User user = (User) factory.getBean("user");                                    //获取Bean
        user.printInfo();//输出JavaBean的属性值
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans
        xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
    <!-- User Bean -->
    <bean name="user" class="com.mr.user.User">
        <constructor-arg>
            <value>小强</value>
        </constructor-arg>
        <constructor-arg>
            <value>26</value>
        </constructor-arg>
        <constructor-arg>
            <value>男</value>
        </constructor-arg>
    </bean>
</beans>

将User对象注入Spring的控制器Manger中，并在控制器中执行User的printInfo（）方法

package com.mr.main;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

import com.mr.user.User;

public class Manger extends AbstractController {
    public static void main(String[] args) {

    }
    private User user;//注入User对象

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    protected ModelAndView handleRequestInternal(HttpServletRequest arg0,
                                                 HttpServletResponse arg1) throws Exception {
        user.printInfo();//执行User中的信息打印方法
        return null;
    }
}
<?xml version="1.0" encoding="UTF-8"?>
<beans
        xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
    <!-- User Bean -->
    <bean id="user" class="com.mr.user.User">
        <property name="name">
            <value>小强</value>
        </property>
        <property name="age">
            <value>26</value>
        </property>
        <property name="sex">
            <value>男</value>
        </property>
    </bean>
    <!-- 注入JavaBean -->
    <bean name="/main.do" class="com.mr.main.Manger">
        <property name="user">
            <ref bean="user"/>
        </property>
    </bean>
</beans>
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
    <display-name>12.3</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <!--设置自动加载配置文件-->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

按bean名称自动装配User

package com.mr.user;

public class PrintInfo {

    private User user;//注入User对象

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }
    //打印的User对象中的属性
    public void PrintUser(){
        System.out.println("PrintInfo打印的User属性");
        System.out.println("----------------------");
        System.out.println("用户姓名--"+user.getName());//输出用户的姓名
        System.out.println("用户年龄--"+user.getAge());//输出用户的年龄
        System.out.println("用户性别--"+user.getSex());//输出用户的性别
    }
}
package com.mr.main;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

import com.mr.user.PrintInfo;

public class Manger {
    public static void main(String[] args) {
        Resource resource = new ClassPathResource("applicationContext.xml");            //装载配置文件
        BeanFactory factory = new XmlBeanFactory(resource);
        PrintInfo printInfo = (PrintInfo) factory.getBean("printInfo");                 //获取Bean
        printInfo.PrintUser();//输出JavaBean的属性值
    }
}

自定义MyDateEditor编辑器将String类型转换为Date类型

package com.mr.ms;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

public class UserInfo {
    private String name;//姓名
    private char sex;//性别
    private int age;//年龄
    private Date date;//出生日期

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public char getSex() {
        return sex;
    }

    public void setSex(char sex) {
        this.sex = sex;
    }

    public void printInfo() {
        System.out.println("姓名：" + name + "\n性别：" + sex + "\n年龄：" + age
                + "\n出生日期：" + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date));
    }
}
package com.mr.ms;

import java.beans.PropertyEditorSupport;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class MyDateEditor extends PropertyEditorSupport {

    private String formate;

    // 设置日期格式方法
    public void setAsText(String text) throws IllegalArgumentException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        try {
            Date date = sdf.parse(text);
            setValue(date);// 设置日期格式
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    public void setFormate(String formate) {
        this.formate = formate;
    }
}

package com.mr.ms;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class PringUserInfo {

    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");//装载配置文件
        UserInfo ui = (UserInfo) context.getBean("user1");//获取bean
        ui.printInfo();//执行bean的打印方法
    }
}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<!-- Spring配置文件 -->
<beans>
    <bean id="user1" class="com.mr.ms.UserInfo">
        <property name="name">
            <value>小强</value>
        </property>
        <property name="sex">
            <value>男</value>
        </property>
        <property name="age">
            <value>26</value>
        </property>
        <property name="date">
            <value>1985-02-08</value>
        </property>
    </bean>
    <bean id="customEditorConfigurer"
          class="org.springframework.beans.factory.config.CustomEditorConfigurer">
        <property name="customEditors">
            <map>
                <entry key="java.util.Date" value="com.mr.ms.MyDateEditor"/>
            </map>
        </property>
    </bean>
</beans>

Spring核心之AOP

利用Spring AOP使日志输出与方法分离，让在调用目标方法之前执行日志输出

package com.mr.log;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

public class LoggerExecute implements MethodInterceptor {
    public Object invoke(MethodInvocation invocation) throws Throwable {
        before();//执行前置通知
        invocation.proceed();
        return null;
    }
    //前置通知
    private void before() {
        System.out.println("程序开始执行！");
    }
}
package com.mr.target;

public class Target {
    //程序执行的方法
    public void execute(String name){
        System.out.println("执行execute()方法：" + name);//输出信息
    }
}
package com.mr.main;

import org.springframework.aop.framework.ProxyFactory;

import com.mr.log.LoggerExecute;
import com.mr.target.Target;

public class Manger {
    //创建代理
    public static void main(String[] args) {
        Target target = new Target();                 //创建目标对象
        ProxyFactory di=new ProxyFactory();
        di.addAdvice(new LoggerExecute());
        di.setTarget(target);
        Target proxy=(Target)di.getProxy();
        proxy.execute("AOP的简单实现");               //代理执行execute()方法
    }
}

在Spring中利用DAO模式向tb_user表中添加数据

package com.mr.user;

public class User {

    private Integer id;//唯一性标识

    private String name;//姓名

    private Integer age;//年龄

    private String sex;//性别

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
}

package com.mr.dao;

import com.mr.user.User;

public interface UserDAOImpl {
    public void inserUser(User user);//添加用户信息的方法
}
package com.mr.dao;

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;

import javax.sql.DataSource;

import com.mr.user.User;

public class UserDAO implements UserDAOImpl {
    private DataSource dataSource;//注入DataSource
    public DataSource getDataSource() {
        return dataSource;
    }
    public void setDataSource(DataSource dataSource) {
        this.dataSource = dataSource;
    }
    //向数据表tb_user中添加数据
    public void inserUser(User user) {
        String name = user.getName();//获取姓名
        Integer age = user.getAge();//获取年龄
        String sex = user.getSex();//获取性别
        Connection conn = null;//定义Connection
        Statement stmt = null;//定义Statement
        try {
            conn = dataSource.getConnection();//获取数据库连接
            stmt = conn.createStatement();
            stmt.execute("INSERT INTO tb_user (name,age,sex) "
                    + "VALUES('"+name+"','" + age + "','" + sex + "')");//添加数据的SQL语句
        } catch (SQLException e) {
            e.printStackTrace();
        }
        finally {
            if(stmt != null) {
                try {
                    stmt.close();//关闭Statement对象
                }
                catch(SQLException e) {
                    e.printStackTrace();
                }
            }
            if(conn != null) {
                try {
                    conn.close();//关闭数据库连接
                }
                catch(SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
<?xml version="1.0" encoding="UTF-8"?>
<beans
        xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
    <!-- 配置数据源 -->
    <bean id="dataSource"
          class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName">
            <value>com.mysql.jdbc.Driver</value>
        </property>
        <property name="url">
            <value>jdbc:mysql://localhost:3306/db_database10
            </value>
        </property>
        <property name="username">
            <value>root</value>
        </property>
        <property name="password">
            <value>986</value>
        </property>
    </bean>
    <!-- 为UserDAO注入数据源 -->
    <bean id="userDAO" class="com.mr.dao.UserDAO">
        <property name="dataSource">
            <ref bean="dataSource"/>
        </property>
    </bean>
</beans>
package com.mr.main;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

import com.mr.dao.UserDAO;
import com.mr.user.User;

public class Manger {

    public static void main(String[] args) {
        Resource resource = new ClassPathResource("applicationContext.xml");            //装载配置文件
        BeanFactory factory = new XmlBeanFactory(resource);
        User user = new User();//实例化User对象
        user.setName("张三");//设置姓名
        user.setAge(new Integer(30));//设置年龄
        user.setSex("男");//设置性别
        UserDAO userDAO = (UserDAO) factory.getBean("userDAO");//获取UserDAO
        userDAO.inserUser(user);//执行添加方法
        System.out.println("数据添加成功!!!");
    }
}

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