Spring代理方式1

一：UserService.java

package com.cloud.demo5;

public interface UserService {

void querUsers();

void saveUser();

void deleteUser();

}
二：UserServiceImpl.java

package com.cloud.demo5;

public class UserServiceImpl implements UserService{

@Override

public void querUsers() {

System.out.println("UserServiceImpl.querUsers()");

}

@Override

public void saveUser() {

System.out.println("UserServiceImpl.saveUser()");

}

@Override

public void deleteUser() {

System.out.println("UserServiceImpl.deleteUser()");

}

}
三：UserServiceImplProxy.java

package com.cloud.demo5;

public class UserServiceImplProxy implements UserService{

private UserService userService;

public UserServiceImplProxy(UserService userService){

this.userService=userService;

}

@Override

public void querUsers() {

System.out.println("之前");

userService.querUsers();

System.out.println("之后");

}

@Override

public void saveUser() {

userService.saveUser();

}

@Override

public void deleteUser() {

userService.deleteUser();

}

}
四：MainTest.java

package com.cloud.demo5;

import org.junit.Test;

public class MainTest {

@Test

public void test1() throws Exception {

UserService userService=new UserServiceImpl();

userService=new UserServiceImplProxy(userService);

userService.querUsers();

}

}