Java-Spring 例题 (2)

annotation.dao 包下的 Leg.java

package annotation.dao;

public interface Leg {public void run();
}

annotation.dao 包下的 LegImpl.java

package annotation.dao;

import org.springframework.stereotype.Repository;

// 配置一个 bean，相当于 <bean id=""class="">。@Repository
public class LegImpl implements Leg{

    @Override
    public void run() {
        // TODO Auto-generated method stub
         System.out.println("健步如飞");
    }
}

annotation.service 包下的 People.java

package annotation.service;

public interface People {public void run();
}

annotation.service 包下的 PeopleImpl.java

package annotation.service;

import annotation.dao.Leg;
import org.springframework.stereotype.Service;
import org.springframework.beans.factory.annotation.Autowired;

// 配置一个 bean，相当于 <bean id="peopleimpl" class="">。@Service("peopleimpl")
public class PeopleImpl implements People{
//    主动依据类型注入。@Autowired
    private Leg l;
    
    public PeopleImpl(Leg l){this.l=l;}
    
    @Override
    public void run() {
        // TODO Auto-generated method stub
         l.run();
         System.out.println("People 构造方法 注入 leg");
    }
}

annotation.service 包下的 PeopleImpl1.java

package annotation.service;

import org.springframework.stereotype.Service;
import org.springframework.beans.factory.annotation.Autowired;
import annotation.dao.Leg;

// 配置一个 bean，相当于 <bean id="peopleimpl1" class="">。@Service("peopleimpl1")
public class PeopleImpl1 implements People {
    @Autowired
    private Leg l1;

    public void setL1(Leg l1) {this.l1 = l1;}

    @Override
    public void run() {
        // TODO Auto-generated method stub
         l1.run();
         System.out.println("People setter 办法 注入 leg");
    }
}

test 包下的 TestPeople.java

package test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import annotation.service.People;

public class TestPeople {public static void main(String[] args) {ApplicationContext appCon=new ClassPathXmlApplicationContext("annotationContext.xml");
        People p=(People)appCon.getBean("peopleimpl");
        p.run();
        People p1=(People)appCon.getBean("peopleimpl1");
        p1.run();}
}

annotationContext.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"
    xmlns:context="http://www.springframework.org/schema/context"
    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">

    <!-- 指定要扫描的包这个包下的注解就会失效 -->
    <context:component-scan base-package="annotation"/>
      <!-- 开启注解的反对 -->
    <context:annotation-config/>
</beans>