Spring AOP-02-后置加强 AfterReturningAdvice

时间 2020-01-29

标签 spring aop 后置加强 afterreturningadvice 栏目 Spring 繁體版

原文原文链接

一、须要加强的类java

package com.test.springadvicetype;

import org.springframework.stereotype.Component;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * 服务员类
 */
@Component
public class Waiter {
    /**
     * 服务
     * @param name
     */
    public String serve(String name) {
        System.out.println(name + ",您好，很高兴为您服务。");
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        return name + ",您好，如今是北京时间" + format.format(new Date());
    }

    /**
     * 开车
     * @param name
     */
    public void driving(String name) {
        throw new RuntimeException(name + "，您好，禁止酒后驾车！");
    }
}

二、后置加强，实现 AfterReturningAdvice 接口spring

package com.test.springadvicetype.afterretuningadvice;

import org.springframework.aop.AfterReturningAdvice;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;

/**
 * 后置加强
 */
@Component
public class SpringAfterReturningAdvice implements AfterReturningAdvice {
    @Override
    public void afterReturning(Object returnValue, Method method, Object[] args, Object target) 
            throws Throwable {
        String methodName = method.getName();
        System.out.printf("AfterReturningAdvice加强的方法返回值是:%s%n", returnValue);
        System.out.printf("AfterReturningAdvice加强的方法是:%s%n", methodName);
        System.out.printf("AfterReturningAdvice加强的方法的参数是:%s%n", args[0]);
        System.out.printf("AfterReturningAdvice加强的对象是:%s%n", target);
    }
}

三、xml配置 spring-chapter3-springaoptype.xmlide

<?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:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 开启注解扫描 -->
    <context:component-scan base-package="com.test.springadvicetype"/>
</beans>

四、运行代码测试

package com.test.springadvicetype.afterretuningadvice;

import org.springframework.aop.AfterReturningAdvice;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;

/**
 * 后置加强
 */
@Component
public class SpringAfterReturningAdvice implements AfterReturningAdvice {
    @Override
    public void afterReturning(Object returnValue, Method method, Object[] args, Object target)
            throws Throwable {
        String methodName = method.getName();
        System.out.printf("AfterReturningAdvice加强的方法返回值是:%s%n", returnValue);
        System.out.printf("AfterReturningAdvice加强的方法是:%s%n", methodName);
        System.out.printf("AfterReturningAdvice加强的方法的参数是:%s%n", args[0]);
        System.out.printf("AfterReturningAdvice加强的对象是:%s%n", target);
    }
}

五、运行结果code

Spring后置加强测试
==========我是分割线==========
Michael,您好，很高兴为您服务。
AfterReturningAdvice加强的方法返回值是:Michael,您好，如今是北京时间2020-01-28 10:27:56
AfterReturningAdvice加强的方法是:serve
AfterReturningAdvice加强的方法的参数是:Michael
AfterReturningAdvice加强的对象是:com.test.springadvicetype.Waiter@2e32ccc5
==========我是分割线==========
Tommy,您好，很高兴为您服务。
AfterReturningAdvice加强的方法返回值是:Tommy,您好，如今是北京时间2020-01-28 10:27:56
AfterReturningAdvice加强的方法是:serve
AfterReturningAdvice加强的方法的参数是:Tommy
AfterReturningAdvice加强的对象是:com.test.springadvicetype.Waiter@2e32ccc5