实验目的
掌握SSM框架整合。
实验环境
硬件：PC机
操作系统：Windows
开发工具：idea
实验内容
整合SSM框架。
实验步骤
- 搭建SSM环境：构建web项目，导入需要的jar包，通过单元测试测试各层框架搭建的正确性。
2
Mapper编写User详情查询；service编写详情查询业务逻辑控制 controller层控制页面的跳转，在详情页面渲染用户详情。
项目结构：
Pom.xml配置文件
注意完成这部分后需要重新加载项目，这里创建了一个maven项目
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>SpringMVC1</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<!-- Spring核心依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.3.10</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.3.10</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.3.10</version>
</dependency>
<!-- Spring MVC依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.10</version>
</dependency>
<!-- MyBatis依赖 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.7</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.7</version>
</dependency>
<!-- 数据库驱动和连接池 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.28</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.10</version>
</dependency>
<!-- Servlet API -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<!-- JUnit测试 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.3.10</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<!-- 加入tomcat插件-->
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<uriEncoding>utf-8</uriEncoding>
<port>8080</port> <!-- 访问端口-->
<!--虚拟项目名-->
<path>/SSM测试</path> <!-- 访问路径，一般就是你的项目名注意前面有个‘/’-->
</configuration>
</plugin>
</plugins>
</build>
</project>
UserController
package org.example.controller;
import org.example.model.User;
import org.example.service.UserServie;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private UserServie userServie;
@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public ModelAndView getUserById(@PathVariable("id") Long id) {
ModelAndView mav = new ModelAndView();
User user = userServie.getById(id);
// 添加user对象到ModelAndView中
mav.addObject("user", user);
// 设置视图名称为userDetails，对应userDetails.jsp页面
mav.setViewName("userDetails");
return mav;
}
}
UserMapper
package org.example.mapper;
import org.example.model.User;
public interface UserMapper {
User getById(Long id);
User getByUsername(String username); // 添加根据username查询的方法
}
User
package org.example.model;
public class User {
private Long id;
private String username;
private String password;
private Long departmentId;
public User() {
}
public User(Long id, String username, String password, Long departmentId) {
this.id = id;
this.username = username;
this.password = password;
this.departmentId = departmentId;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
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;
}
public Long getDepartmentId() {
return departmentId;
}
public void setDepartmentId(Long departmentId) {
this.departmentId = departmentId;
}
}
UserServiceImpl
package org.example.service.impl;
import org.example.mapper.UserMapper;
import org.example.model.User;
import org.example.service.UserServie;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class UserServiceImpl implements UserServie {
@Autowired
private UserMapper userMapper;
@Override
public User getById(Long id) {
return userMapper.getById(id);
}
@Override
public User getByUsername(String username) {
return userMapper.getByUsername(username);
}
}
UserServie
package org.example.service;
import org.example.model.User;
public interface UserServie {
User getById(Long id);
User getByUsername(String username); // 添加根据username查询的方法声明
}
编写UserMapper.xml
注意：s_user是数据库mydb中的一个数据表
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="org.example.mapper.UserMapper">
<select id="getById" parameterType="long" resultType="org.example.model.User">
SELECT id, username, password, dept_id AS departmentId
FROM s_user
WHERE id = #{id}
</select>
<select id="getByUsername" resultType="org.example.model.User"></select>
</mapper>
编写applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 开启注解扫描 -->
<context:component-scan base-package="org.example"/>
<!-- 配置MyBatis数据源（这里要结合具体mysql情况修改） -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/数据库名"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
</bean>
<!-- 配置SqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath*:mapper/*.xml"/>
</bean>
<!-- 扫描MyBatis的Mapper接口 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="org.example.mapper"/>
</bean>
<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 启用注解驱动 -->
<mvc:annotation-driven/>
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
编写user Details.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>User Details</title>
</head>
<body>
<h2>User Details</h2>
<table border="1">
<tr>
<th>ID</th>
<th>Name</th>
<th>Password</th>
<th>Department ID</th>
</tr>
<tr>
<td>${user.id}</td>
<td>${user.username}</td>
<td>${user.password}</td>
<td>${user.departmentId}</td>
</tr>
</table>
</body>
</html>
编写web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<!-- Spring MVC前端控制器 -->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
编写一个测试类用于测试整合情况
UserServicelmplTest.java
package org.example.service.impl;
import org.example.model.User;
import org.example.service.UserServie;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import static org.junit.Assert.*;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:applicationContext.xml"})
public class UserServicelmplTest {
@Autowired
private UserServie userService;
@Test
public void testGetById() {
Long userId = 11L;
User user = userService.getById(userId);
assertNotNull("The user should not be null", user);
assertEquals("The user ID should match the expected ID", userId, user.getId());
System.out.println("Retrieved user: " + user.toString());
}
}
测试结果
运行效果
部署本地后在本地浏览器的运行地址为：localhost:8080/SSM测试/user/12,其中12为响应的id
