Spring动态代理实现日志功能详解

package com.haijiao12138.demo.spring.agentLog0815;
 

public interface BusinessClassService {
 
    public void doSomeThing();//自定义接口
 
}

package com.haijiao12138.demo.spring.agentLog0815;
 

public class BusinessClassServiceImpl implements BusinessClassService {
 
    //执行某事
    @Override
    public void doSomeThing() {
        System.out.println("doing  somthing......");
    }
}

package com.haijiao12138.demo.spring.agentLog0815;
 
import java.lang.reflect.Method;
 

public interface MyLogger {
 
    //记录进入方法时间
    public void saveIntoMethodTime(Method method);
 
    //记录退出方法的时间
    public void saveOutMethodTime(Method method);
}

package com.haijiao12138.demo.spring.agentLog0815;
 
import java.lang.reflect.Method;
import java.util.Date;
 

public class MyLoggerImpl  implements MyLogger{
    @Override
    public void saveIntoMethodTime(Method method) {
        System.out.println("进入" + method.getName()  +"方法时间为: " + new Date());
    }
 
    @Override
    public void saveOutMethodTime(Method method) {
        System.out.println("退出" + method.getName() + "方法时间为：" + new Date());
    }
}

package com.haijiao12138.demo.spring.agentLog0815;
 
import java.lang.reflect.Method;
import java.util.Date;
 

public class MyLoggerImpl  implements MyLogger{
    @Override
    public void saveIntoMethodTime(Method method) {
        System.out.println("进入" + method.getName()  +"方法时间为: " + new Date());
    }
 
    @Override
    public void saveOutMethodTime(Method method) {
        System.out.println("退出" + method.getName() + "方法时间为：" + new Date());
    }
}

package com.haijiao12138.demo.spring.agentLog0815;
 
import java.lang.reflect.Proxy;
 

public class MyLoggerTest {
    public static void main(String[] args) {
        
        BusinessClassService businessClassService = new BusinessClassServiceImpl();
        
        MyLoggerHandler myLoggerHandler = new MyLoggerHandler(businessClassService);
        
        BusinessClassService businessClass = (BusinessClassService) Proxy.newProxyInstance(businessClassService.getClass().getClassLoader(), businessClassService.getClass().getInterfaces(),myLoggerHandler);
        
        businessClass.doSomeThing();
 
    }
 
}