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/beanshttps://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");}
}