Spring AOP xml配置方法

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本文介绍了一种软件设计模式——面向切面编程(AOP)，并通过具体示例展示了如何使用Spring框架实现AOP的各种通知类型，包括前置通知、后置通知、环绕通知等。

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面向切面编程

所有支持<aop:aspect>标签的功能只支持单例模式。

配置类截图

package com.test.xml;

import org.aspectj.lang.ProceedingJoinPoint;

public class MoocAspect {
public void before(){
  System.out.println("*********before********");
}
public void after(){
  System.out.println("*********after*********");
}
public void afterReturn(){
  System.out.println("******afterReturn*****");
}

/*
* <aop:around method="around" pointcut-ref="bizservice3"/>
* 在执行around时候必须要有ProceedingJoinPoint类型的参数，并且返回一个Object值。
*
*/
public Object around(ProceedingJoinPoint pjp) {
  Object object = null;
  try {
    System.out.println("******around1*****");
    object = pjp.proceed();
    System.out.println("******around2*****");

  } catch (Throwable e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  return object;
}
public void afterThrowing(){
  System.out.println("**********afterThrowing*********");
}

public Object aroundParameter(ProceedingJoinPoint pjp,String name,String sex,int age){
  Object o = null;
  try {
   System.out.println("aroundParameter1:"+name+" "+sex+" "+age);
   o = pjp.proceed();
   System.out.println("aroundParameter2:"+name+" "+sex+" "+age);
  } catch (Throwable e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  return o;

}

}

业务类：

package com.test.xml;

import java.io.File;

public class AspectBiz {
public void bizservice(){
  System.out.println("*********执行bizservice()************");
}

public void bizreturn(){
  System.out.println("**********执行bizreturn()**************");
}

public void bizaround(){
  System.out.println("**********执行bizaround()**************");
}
public void bizafterthrow() throws Exception{
  System.out.println("**********执行bizAfterthrow()**************");
  File f =null;
  f.getName();

}
/*
* <aop:pointcut id="bizservice5" expression="execution(* com.test.xml.AspectBiz.*aroundParameter(String,String,int)) and args(name,sex,age)" />
* 规定参数名字必须是name,sex,age
*/

public void bizaroundParameter(String name,String sex,int age){
  System.out.println("*********bizaroundPararmeter*********");
}

}

测试类：package com.test.xml;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.BlockJUnit4ClassRunner;
import com.junit.test.UnitTestBase;
/*
* 测试类
*/
@RunWith(BlockJUnit4ClassRunner.class)
public class TestXml extends UnitTestBase {
public TestXml(){
  super("classpath:applicationContext.xml");
  //super("classpath:round.xml");
}
@Test
public void test1() throws Exception {
  AspectBiz ab = super.getBean("aspectBiz");
//  ab.bizservice();
//  //从慕课网（用的spring4）看到的视频是after应该在afterreturn后执行，实验结果（用的spring3）是afterreturn在after之后
//  ab.bizreturn();
//  ab.bizaround();
//  ab.bizafterthrow();
//  ab.bizaroundParameter("zhangfei", "man", 23);

}

}

UnitTestBase类：

package com.junit.test;

import org.junit.After;
import org.junit.Before;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class UnitTestBase {
private ClassPathXmlApplicationContext context;
private String stringXmlPath;
public UnitTestBase() {};
public UnitTestBase(String stringXmlPath) {
  this.stringXmlPath = stringXmlPath;
};
@Before
public void before(){

  if(stringXmlPath==null||stringXmlPath.equals("")){
   stringXmlPath = "classPath*:spring-*.xml";
  }
  try{
   context = new ClassPathXmlApplicationContext(stringXmlPath.split("[,\\s]+"));
   context.start();
  }catch(Exception e){
   e.printStackTrace();
  }
}
@After
public void after(){
  context.destroy();

}

@SuppressWarnings("unchecked")
protected <T extends Object>T getBean(String beanId){
  return (T)context.getBean(beanId);
}

protected <T extends Object>T getBean(Class<T> clazz){
  return (T)context.getBean(clazz);
}

}

applicationContext.xml:

<?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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

<bean id="mookAspect" class="com.test.xml.MoocAspect"/>
<bean id="aspectBiz" class="com.test.xml.AspectBiz"/>

<aop:config>
<aop:aspect id="mookAspectAop" ref="mookAspect">
<aop:pointcut id="bizservice1" expression="execution(public * *(..))" />
<aop:pointcut id="bizservice2" expression="execution(* com.test.xml.AspectBiz.*return(..))" />
<aop:pointcut id="bizservice3" expression="execution(* com.test.xml.AspectBiz.*around(..))" />
<aop:pointcut id="bizservice4" expression="execution(* com.test.xml.AspectBiz.*afterthrow(..))" />
<aop:pointcut id="bizservice11" expression="execution(* com.test.xml.AspectBiz.*aroundParameter(String,String,int)) and args(name,sex,age)"/>
<aop:before method="before" pointcut-ref="bizservice1"/>
<aop:after method="after" pointcut-ref="bizservice1"/>
<aop:after-returning method="afterReturn" pointcut-ref="bizservice2"/>

<aop:after-throwing method="afterThrowing" pointcut-ref="bizservice4"/>
<aop:around method="around" pointcut-ref="bizservice3"/>
<aop:around method="aroundParameter" pointcut-ref="bizservice11"/>

</aop:aspect>
</aop:config>

</beans>

其中applicationContext.xml中的<aop:around method="around" pointcut-ref="bizservice3"/>
<aop:around method="aroundParameter" pointcut-ref="bizservice11"/>这两条配置需要挨着，否则实验测试时候总是包.xml文件初始化错误，原因未找到