代理模式(Proxy)是通过代理对象访问目标对象,这样可以在目标对象基础上增强额外的功能,如添加权限,访问控制和审计等功能。
1.自定义业务接口
1
2
3
4
5
6
7
8
9
10
11
12
13
|
package com.haijiao12138.demo.spring.agentLog0815;
/**
* @author: haijiao12138
* @ClassName: BusinessClassService
* @description: TODO
* @date: 2021/8/15 14:33
*/
public interface BusinessClassService {
public void doSomeThing(); //自定义接口
}
|
2.自定义业务接口实现类
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
|
package com.haijiao12138.demo.spring.agentLog0815;
/**
* @author: haijiao12138
* @ClassName: BusinessClassServiceImpl
* @description: 业务类
* @date: 2021/8/15 14:34
*/
public class BusinessClassServiceImpl implements BusinessClassService {
//执行某事
@Override
public void doSomeThing() {
System.out.println( "doing somthing......" );
}
}
|
3.日志接口和实现类
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
package com.haijiao12138.demo.spring.agentLog0815;
import java.lang.reflect.Method;
/**
* @author: haijiao12138
* @ClassName: MyLogger
* @description:日志类接口
* @date: 2021/8/15 14:38
*/
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);
}
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
package com.haijiao12138.demo.spring.agentLog0815;
import java.lang.reflect.Method;
import java.util.Date;
/**
* @author: haijiao12138
* @ClassName: MyLoggerImpl
* @description: TODO 日志实现类
* @date: 2021/8/15 14:40
*/
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());
}
}
|
4.下面是日志类的handler实现:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
package com.haijiao12138.demo.spring.agentLog0815;
import java.lang.reflect.Method;
import java.util.Date;
/**
* @author: haijiao12138
* @ClassName: MyLoggerImpl
* @description: TODO 日志实现类
* @date: 2021/8/15 14:40
*/
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());
}
}
|
5.测试类
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
package com.haijiao12138.demo.spring.agentLog0815;
import java.lang.reflect.Proxy;
/**
* @author: haijiao12138
* @ClassName: MyLoggerTest
* @description: TODO 日志测试类
* @date: 2021/8/15 14:43
*/
public class MyLoggerTest {
public static void main(String[] args) {
/** 实例化真实项目中业务类 **/
BusinessClassService businessClassService = new BusinessClassServiceImpl();
/** 日志类的handler **/
MyLoggerHandler myLoggerHandler = new MyLoggerHandler(businessClassService);
/** 获得代理类对象 **/
BusinessClassService businessClass = (BusinessClassService) Proxy.newProxyInstance(businessClassService.getClass().getClassLoader(), businessClassService.getClass().getInterfaces(),myLoggerHandler);
/** 执行代理类方法 **/
businessClass.doSomeThing();
}
}
|
结果输出:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/qq_40604313/article/details/119713796