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要求

• 利用注解形式实现在jdbc中的通知，通知方法形式是输出当前的时间~

代码实现

实体类

• 根据数据库表格封装实例类
  

package JDBC_AOP.Entry;public class User {       // 字段    private String userId;    private String userName;    private String userStatus;    //重写toString（）    @Override    public String toString() {           return "User{" +                "userId='" + userId + '\'' +                ", userName='" + userName + '\'' +                ", userStatus='" + userStatus + '\'' +                '}';    }    // set\get    public void setUserId(String userId) {           this.userId = userId;    }    public void setUserName(String userName) {           this.userName = userName;    }    public void setUserStatus(String userStatus) {           this.userStatus = userStatus;    }    public String getUserId() {           return userId;    }    public String getUserName() {           return userName;    }    public String getUserStatus() {           return userStatus;    }}

Dao层

package JDBC_AOP.Dao;import JDBC_AOP.Entry.User;import java.util.List;public interface UserDao {       List
   
     getAll();}
   

package JDBC_AOP.Dao;import JDBC_AOP.Entry.User;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.jdbc.core.BeanPropertyRowMapper;import org.springframework.jdbc.core.JdbcTemplate;import org.springframework.stereotype.Repository;import java.util.List;@Repositorypublic class UserDaoImpl implements UserDao{       @Autowired    JdbcTemplate jdbcTemplate;  // 注入jdbcTemplate帮助类    @Override                   // 查询所有    public List
   
     getAll() {           String sql = "select * from t_user";        List
    
      list = jdbcTemplate.query(sql,new BeanPropertyRowMapper
     
      (User.class));        System.out.println(list.get(1).getUserName());        return list;    }}
     
    
   

Service层

package JDBC_AOP.Service;import JDBC_AOP.Entry.User;import java.util.List;public interface UserService {       List
   
     getAll();}
   

package JDBC_AOP.Service;import JDBC_AOP.Dao.UserDao;import JDBC_AOP.Entry.User;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import java.util.List;@Servicepublic class UserServiceImpl implements UserService{       @Autowired    private UserDao dao;    @Override    public List
   
     getAll() {           return dao.getAll();    }}
   

Aop处理

package JDBC_AOP.Extra;import org.aspectj.lang.annotation.After;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;import org.omg.CORBA.PUBLIC_MEMBER;import org.springframework.stereotype.Component;import java.text.SimpleDateFormat;import java.util.Date;@Aspect@Componentpublic class Extra {       // 抽取公共切入点    @Pointcut("execution(* JDBC_AOP.Dao.UserDaoImpl.getAll(..))")    public void all(){   }    @Before(value="all()")   // 前置通知    public void showTimeBefore(){           Date date = new Date(System.currentTimeMillis());        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-hh HH:mm:ss:SSS");        String str = simpleDateFormat.format(date);        System.out.println(str+" Before");    }    @After(value="all()")    // 后置通知    public void showTimeAfter(){           Date date = new Date(System.currentTimeMillis());        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-hh HH:mm:ss:SSS");        String str = simpleDateFormat.format(date);        System.out.println(str+" After");    }}

xml配置

测试类

package JDBC_AOP;import JDBC_AOP.Dao.UserDao;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Test {       @Autowired    private UserDao dao;      // 注入UserDao对象    // 测试方法     public void print(){           dao.getAll();    }    public static void main(String[] args) {           ApplicationContext context = new ClassPathXmlApplicationContext("JDBC_AOP/jdbcaop.xml");        Test test = context.getBean("test",Test.class);        test.print();    }}

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