Spring(十二)使用Spring的xml文件配置方式实现AOP

配置文件与注解方式的有非常大不同，多了非常多配置项。

beans2.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:context="http://www.springframework.org/schema/context"

xmlns:aop="http://www.springframework.org/schema/aop"

xsi:schemaLocation="http://www.springframework.org/schema/beans

           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd

           http://www.springframework.org/schema/context

           http://www.springframework.org/schema/context/spring-context-2.5.xsd

           http://www.springframework.org/schema/aop 

           http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">

     <aop:aspectj-autoproxy />

    <bean id="personService" class="test.spring.service.impl.PersonServiceBean"></bean>

    <bean id="myInterceptor" class="test.spring.aop.MyInterceptor2"></bean>

    <aop:config>

           <aop:aspect id="myAspect" ref="myInterceptor">

                    <aop:pointcut  id="myPointCut"  expression="execution(* test.spring.service.impl.PersonServiceBean.*(..))"
/>

                    <aop:before pointcut-ref="myPointCut" method="doAccessCheck" />

                    <aop:after-returning pointcut-ref="myPointCut"  method="doAfterReturning" />

                    <aop:after-throwing pointcut-ref="myPointCut"  method="doAfterThrowing" />

                    <aop:around pointcut-ref="myPointCut" method="doAround" />

                    <aop:after pointcut-ref="myPointCut" method="doAfter" />

           </aop:aspect>

    </aop:config>

</beans> 

切面的切入点语法定义

• 拦截test.spring.service.impl.PersonServiceBean下的全部方法
  
  expression="execution(* test.spring.service.impl.PersonServiceBean.*(..))"
  
  
• 拦截test.spring.service.impl子包下的全部类的全部方法
  
  expression="execution(* test.spring.service.impl..*.*(..))"
  
  
• 拦截test.spring.service.impl.PersonServiceBean下的全部返回值为String类型的方法
  
  expression="execution(java.lang.String test.spring.service.impl.PersonServiceBean.*(..))"
  
  
• 拦截test.spring.service.impl.PersonServiceBean下的全部方法中第一个參数类型为String的方法
  
  expression="execution(* test.spring.service.impl.PersonServiceBean.*(java.lang.String,..))"

package test.spring.service.impl;

import test.spring.service.PersonService;

//代理对象实现目标对象全部接口
public class PersonServiceBean implements PersonService {

	public PersonServiceBean() {

	}

	@Override
	public void save(String name) {
		System.out.println("save()->>" + name);
		throw new RuntimeException(">>----自己定义异常----<<");
	}

	@Override
	public String getResult() {
		return "getResult()==>>返回结果";
	}

}

package test.spring.aop;

import org.aspectj.lang.ProceedingJoinPoint;

public class MyInterceptor2 {

	public void doAccessCheck() {
		System.out.println("前置通知-->>");
	}

	public void doAfterReturning() {
		System.out.println("后置通知-->>");
	}

	public void doAfter() {
		System.out.println("终于通知");
	}

	public void doAfterThrowing() {
		System.out.println("异常通知-->");
	}

	public Object doAround(ProceedingJoinPoint pJoinPoint) throws Throwable {
		System.out.println("围绕通知");
		// 这里假设pJoinPoint.proceed()不运行。后面拦截到的方法都不会运行，很适用于权限管理
		Object result = pJoinPoint.proceed();
		System.out.println("退出");
		return result;
	}

}

package test.spring.junit;

import org.junit.Test;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import test.spring.service.PersonService;

public class AOPTest3 {

	@Test
	public void test() {
		AbstractApplicationContext aContext = //
		new ClassPathXmlApplicationContext("beans2.xml");
		PersonService pService = (PersonService) aContext
				.getBean("personService");
		pService.save("LinDL");
		pService.getResult();
		aContext.close();
	}

}