Java-Spring例题

dao包下的TestDIDao.java

package dao;

public interface TestDIDao {
	public void sayHello();
}

dao包下的TestDIDaoImpl.java

package dao;

public class TestDIDaoImpl implements TestDIDao{
	
	
	@Override
	public void sayHello() {
		// TODO Auto-generated method stub
		System.out.println("TestDIDao say：Hello,Study Hard!");
	}

}

service包下的TestDIService.java

package service;

public interface TestDIService {
	public void sayHello();
}

service包下的TestDIServiceImpl.java

package service;

import dao.TestDIDao;
import dao.TestDIDaoImpl;

public class TestDIServiceImpl implements TestDIService {
	private TestDIDao t;
	
	public TestDIServiceImpl(TestDIDao t) {
		this.t=t;
	}

	@Override
	public void sayHello() {
		// TODO Auto-generated method stub
		t.sayHello();
		System.out.println("TestDIService 构造方法 注入 say：Hello,Study hard!");
	}
	
}

service包下的TestDIServiceImpl1.java

package service;

import dao.TestDIDao;

public class TestDIServiceImpl1 implements TestDIService{
	private TestDIDao t1;

	public void setT1(TestDIDao t1) {
		this.t1 = t1;
	}

	@Override
	public void sayHello() {
		t1.sayHello();
		System.out.println("TestDIService setter方法注入 say: Hello,study hard!");
	}
}

test包下的TestDI.java

package test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import service.TestDIService;
public class TestDI {
	public static void main(String[] args) {
		//初始化Spring容器ApplicationContext，加载配置文件
		ApplicationContext appCon = new ClassPathXmlApplicationContext("applicationContext.xml");
		//通过容器获取testDIService实例，测试构造方法注入
		TestDIService ts = (TestDIService)appCon.getBean("testDIService");
		ts.sayHello();
		TestDIService ts1 = (TestDIService)appCon.getBean("testDIService1");
		ts1.sayHello();
	}
}

dao包下的Leg.java

package dao;

public interface Leg {
    public void run();
}

dao包下的LegImpl.java

package dao;

public class LegImpl implements Leg{

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

service包下的People.java

package service;

public interface People {
	public void run();
}

service包下的PeopleImpl.java

package service;

import dao.Leg;

public class PeopleImpl implements People{
	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");
	}
}

service包下的PeopleImpl1.java

package service;

import dao.Leg;

public class PeopleImpl1 implements People{

	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方法 注入 leg");
	}
}

test包下的TestPeople.java

package test;

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

import service.People;

public class TestPeople {
	public static void main(String[] args) {
	ApplicationContext appCon=new ClassPathXmlApplicationContext("applicationContext.xml");
	People p=(People)appCon.getBean("people");
	p.run();
	People p1=(People)appCon.getBean("people1");
	p1.run();
 }
}

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="myTestDIDao" class="dao.TestDIDaoImpl"/>
	
	<bean id="testDIService" class="service.TestDIServiceImpl">
	   <constructor-arg index="0" ref="myTestDIDao"></constructor-arg>
	</bean>	
	
	<bean id="testDIService1" class="service.TestDIServiceImpl1">
	   <property name="t1" ref="myTestDIDao"/>
	</bean>
	
	<bean id="leg" class="dao.LegImpl"/>
	
	<bean id="people" class="service.PeopleImpl">
		<constructor-arg index="0" ref="leg"></constructor-arg>
	</bean>
	
	<bean id="people1" class="service.PeopleImpl1">
		<property name="l1" ref="leg"></property>
	</bean>
</beans>