Java-Spring例题

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