Spring代理处理参数和方法_dynamicmockmanager-优快云博客

本文链接：https://blog.youkuaiyun.com/longronglin/article/details/3301905

本文介绍如何使用 Spring AOP 在 UserManager 接口的方法调用前进行参数和方法名的检查，确保安全性。通过配置 aspect 和 pointcut，实现对 addUser 方法的前置通知。

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Spring代理处理参数和方法:

package com.rx.spring.dynamicmock;
public interface UserManager {
    public void addUser(String username, String password);
    
    public void deleteUser(int id);
    
}

package com.rx.spring.dynamicmock;
public class UserManagerImpl implements UserManager {
    public void addUser(String username, String password) {
        System.out.println("-------UserManagerImpl.addUser()----------");
    }
    public void deleteUser(int id) {
        System.out.println("-------UserManagerImpl.deleteUser()----------");
    }
}

package com.rx.spring.dynamicmock;
import org.aspectj.lang.JoinPoint;
public class SecurityHandler {
    
    /***
     * 处理连接点
     * @param joinPoint 
     */
    private void checkSecurity(JoinPoint joinPoint) {
        
        Object[] args = joinPoint.getArgs();
        for (int i=0; i<args.length; i++) {
            System.out.println(args[i]);
        }
        
        System.out.println(joinPoint.getSignature().getName());
        
        System.out.println("----------checkSecurity()---------------");
    }
    
}

package com.rx.spring.dynamicmock;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Client {
    public static void main(String[] args) {
        BeanFactory factory = new ClassPathXmlApplicationContext("applicationContextMockSpring.xml");
        
        UserManager userManager = (UserManager)factory.getBean("userManager");
        
        userManager.addUser("abc", "123");
        
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:aop="http://www.springframework.org/schema/aop"
         xmlns:tx="http://www.springframework.org/schema/tx"
         xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd 
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd 
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd"> 
    
    <bean id="securityHandler" class="com.rx.spring.dynamicmock.SecurityHandler"/>           
    
    <bean id="userManager" class="com.rx.spring.dynamicmock.UserManagerImpl"/>
    
    <aop:config>
        <aop:aspect id="security" ref="securityHandler">
            <aop:pointcut id="allAddMethod" expression="execution(* com.rx.spring.dynamicmock.UserManagerImpl.add*(..))"/>
            <aop:before method="checkSecurity" pointcut-ref="allAddMethod"/>
        </aop:aspect>
    </aop:config>   
</beans>

运行结果：

abc
123
addUser
----------checkSecurity()---------------
-------UserManagerImpl.addUser()----------