002. Spring Inversion of Control (IoC)

1、创建Java项目：File -> New -> Java Project

2、引入必要jar包，项目结构如下

3、创建WorkService接口WorkService.java

package com.spring.service;public interface WorkService {    public abstract void doWork();}

4、实现WorkServiceImp类WorkServiceImp.java

package com.spring.service.imp;import com.spring.service.WorkService;public class WorkServiceImp implements WorkService {    @Override    public void doWork() {        System.out.println("WorkServiceImp do work...");    }}

5、创建Worker类Worker.java

package com.spring.model;import com.spring.service.WorkService;public class Worker {    private WorkService workService = null;    public WorkService getWorkService() {        return workService;    }    public void setWorkService(WorkService workService) {        this.workService = workService;    }    public void doWork() {        workService.doWork();    }}

6、创建spring配置文件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         http://www.springframework.org/schema/beans/spring-beans.xsd">    <bean id="workService" class="com.spring.service.imp.WorkServiceImp"></bean>    <bean id="worker" class="com.spring.model.Worker">        <property name="workService" ref="workService"></property>    </bean></beans>

7、创建Spring测试类SpringUnit.java

package com.spring.junit;import org.junit.Test;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.spring.model.Worker;public class SpringUnit {    @Test    public void test() {        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");        Worker worker = (Worker) ctx.getBean("worker");        worker.doWork();        ctx.close();    }}

8、测试结果

... 省略Spring日志信息 ...WorkServiceImp do work...... 省略Spring日志信息 ...