spring入门程序

安装eclipse

https://blog.csdn.net/qq_36437991/article/details/131644570

新建maven项目

在这里插入图片描述

安装依赖包

pom.xml

<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.wujialiang</groupId>
  <artifactId>springstudy01</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>springstudy01</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
   <dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>5.0.4.RELEASE</version>
		</dependency>


		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>5.0.4.RELEASE</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>5.0.4.RELEASE</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-expression</artifactId>
			<version>5.0.4.RELEASE</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
		<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
			<version>1.2</version>
		</dependency>
  </dependencies>
</project>

创建代码

新建HelloSpring.java

package com.wujialiang.springstudy01;

public class HelloSpring {
	private String userName;

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public void show() {
		System.out.println("您好:" + userName);
	}
}

src下main下新建resources文件夹，该文件夹下新建applicationContext.xml

<?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
        https://www.springframework.org/schema/beans/spring-beans.xsd">
        <!-- spring创建对象实例 -->
        <bean id="helloSpring" class="com.wujialiang.springstu001.HelloSpring">
        	<!-- 属性赋值 -->
        	<property name="userName" value="张三"></property>
        </bean>
</beans>

App.java代码如下

package com.wujialiang.springstudy01;

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

/**
 * Spring入门
 *
 */
public class App 
{
    public static void main( String[] args )
    {
    	ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
    	HelloSpring helloSpring = (HelloSpring)ctx.getBean("helloSpring");
    	helloSpring.show();
    	((ConfigurableApplicationContext)ctx).close();
    	System.out.println("执行完毕");
    }
}