Spring Aop Annotation

实体:

package com.bxw.aop.vo;

public class User {
    private String loginId;
    
    public User() {
    }
    
    public String getLoginId() {
        return loginId;
    }

    public void setLoginId(String loginId) {
        this.loginId = loginId;
    }
    
}

dao:

package com.bxw.aop.dao;

public interface UserDao {
    public void login(String id);
}

package com.bxw.aop.daoimpl;

import org.springframework.stereotype.Repository;

import com.bxw.aop.dao.UserDao;
@Repository("userDao")
public class UserDaoImpl implements UserDao{

    public void login(String id) {
        System.out.println("-----logining------"+id);
    }
}

service:

package com.bxw.aop.service;

public interface UserService {
    public void login(String id);
}

package com.bxw.aop.serviceimpl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

import com.bxw.aop.dao.UserDao;
import com.bxw.aop.service.UserService;
@Service("userService")
public class UserServiceImpl implements UserService{
    private UserDao userdao;
    
    public UserDao getUserdao() {
        return userdao;
    }
    @Autowired
    public void setUserdao(@Qualifier(value="userDao") UserDao userdao) {
        this.userdao = userdao;
    }

    public void login(String id) {
        userdao.login(id);
    }

}

或

package com.bxw.aop.serviceimpl;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

import com.bxw.aop.dao.UserDao;
import com.bxw.aop.service.UserService;
@Service("userService")
public class UserServiceImpl implements UserService{
    private UserDao userdao;
    
    public UserDao getUserdao() {
        return userdao;
    }
    @Resource(name="userDao")
    public void setUserdao(UserDao userdao) {
        this.userdao = userdao;
    }

    public void login(String id) {
        userdao.login(id);
    }

}

两份代码只是UserDao注入时，注解不同

interceptor:

package com.bxw.aop.interceptor;

import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class UserInterceptor {
    @Before("execution(public void com.bxw.aop.dao.UserDao.login(String))")
    public void loginBefore(){
        System.out.println("loginStart");
    }
    @After("execution(public void com.bxw.aop.dao.UserDao.login(String))")
    public void loginAfter(){
        System.out.println("loginOver");
    }
}

织入点语法：

@Before("execution(public void com.bxw.aop.dao.UserDao.login(String))")

Test:

package com.bxw.aop.Test;

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

import com.bxw.aop.service.UserService;
import com.bxw.aop.vo.User;

public class Test {
    public static void main(String[] args) {
        User user = new User();
        user.setLoginId("Bao");
        
        ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserService userService = (UserService) ac.getBean("userService");
        userService.login(user.getLoginId());
    }
}