springmvc之环绕通过(最简单的用法,配置)

最新推荐文章于 2024-01-29 08:00:00 发布

原创最新推荐文章于 2024-01-29 08:00:00 发布 · 1.4k 阅读

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本文通过具体示例介绍如何在Spring框架中实现AOP环绕通知，包括定义接口和服务实现类，编写环绕通知逻辑，并在配置文件中进行相应配置，最后通过JUnit测试验证环绕通知的效果。

1. service类

package com.ssm.blog.aop;

public interface AopService {
	public void sayAround(String param); 
}

2. serviceImpl类

package com.ssm.blog.aop;

public class AopServiceImpl implements AopService{

	public void sayAround(String param) {
		System.out.println("============around param:" + param);
	}

}

3. aop环绕通知类

package com.ssm.blog.aop;

import org.aspectj.lang.ProceedingJoinPoint;

public class StringAop{

	public Object aroundAdvice(ProceedingJoinPoint pjp) throws Throwable {
	    System.out.println("===========around before advice");
	    Object[] obj = pjp.getArgs() ;
	    Object retVal = null ;
	    for(int i=0;i<obj.length;++i){
	    	System.out.println(i+"---->"+obj[i]);
	    	if(obj[i].equals("haha")){
	    		retVal = pjp.proceed(new Object[] {"replace12312321"});
	    	}
	    }
	    //Object retVal = pjp.proceed(new Object[] {"replace"});
	    System.out.println("===========around after advice");
	    return retVal ;
	}
 
}

4. 在配置文件中进行配置

<bean id="aspectSupportBean" class="com.ssm.blog.aop.StringAop"/>
	<bean id="aopService" class="com.ssm.blog.aop.AopServiceImpl"/>		
		
	<aop:config>	
		<aop:aspect ref="aspectSupportBean">  
	 		<aop:around pointcut="execution(* com.ssm..*.sayAround(..))" method="aroundAdvice"/>  
	 	</aop:aspect>
	</aop:config>

5. Junit测试

public class TestAop {

	@Test  
	public void testSchemaAroundAdvice() {  
	    System.out.println("======================================");  
	    ApplicationContext ctx = new ClassPathXmlApplicationContext("aop.xml");  
	    AopService aopService =  ctx.getBean("aopService", AopService.class);  
	    aopService.sayAround("haha");  
	    System.out.println("======================================");  
	}  
}