Spring AOP实现方式三【附源码】
2015-04-18 23:18
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注解AOP实现
源码结构:
1、首先我们新建一个接口,love 谈恋爱接口。
package com.spring.aop; /** * 谈恋爱接口 * * @author Administrator * */ public interface Love { /* * 谈恋爱方法 */ void fallInLove(); void test() throws Exception; }.csharpcode, .csharpcode pre
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[/code]
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2、我们写一个Person类实现Love接口
package com.spring.aop; /** * 人对象 * * @author luwenbin006@163.com * */ public class Person implements Love { /* * 重写谈恋爱方法 */ @Override public void fallInLove() { System.out.println("谈恋爱了..."); } @Override public void test() throws Exception { // TODO Auto-generated method stub throw new Exception("我就说你们在一起不会幸福的,你能拿我怎么滴?"); } }
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3、下面我们来写aop 注解通知类【执行方法前 执行方法后 执行方法前后也称为环绕方法 方法执行过程中抛出异常】
package com.spring.aop; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.After; import org.aspectj.lang.annotation.AfterThrowing; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.aspectj.lang.annotation.Pointcut; /** * 注解方式 aop通知类 * * @author luwenbin006@163.com * */ @Aspect public class LoveHelper { @Pointcut("execution(* com.spring.aop.*..*(..))") private void loveMethod() { }// 定义一个切入点 // 在调用方法之前执行 执行拦截包com.spring.aop.*下所有的方法 @Before("execution(* com.spring.aop.*..*(..))") public void before(JoinPoint point) throws Throwable { System.out.println("before::method " + point.getTarget().getClass().getName() + "." + point.getSignature().getName()); System.out.println("谈恋爱之前必须要彼此了解!"); } // 在调用方法前后执行 @Around("execution(* com.spring.aop.*..*(..))") public Object around(ProceedingJoinPoint point) throws Throwable { System.out.println("around::method " + point.getTarget().getClass().getName() + "." + point.getSignature().getName()); if (point.getArgs().length > 0) { return point.proceed(point.getArgs()); } else { return point.proceed(); } } // 在调用方法之后执行 @After("execution(* com.spring.aop.*..*(..))") public void afterReturning(JoinPoint point) throws Throwable { System.out.println("method " + point.getTarget().getClass().getName() + "." + point.getSignature().getName()); System.out.println("我们已经谈了5年了,最终还是分手了!"); // System.out.println("我们已经谈了5年了,最终步入了结婚的殿堂!"); } // 当抛出异常时被调用 @AfterThrowing(value = "execution(* com.spring.aop.*..*(..))", throwing = "ex") public void doThrowing(JoinPoint point, Throwable ex) { System.out.println("doThrowing::method " + point.getTarget().getClass().getName() + "." + point.getSignature().getName() + " throw exception"); System.out.println(ex.getMessage()); } }
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4、配置好application.xml 就配置好bean和aop通知类 加上一句启用注解模式配置。
<?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" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"> <!-- 配置bean --> <bean id="person" class="com.spring.aop.Person"> </bean> <!-- 配置通知方法类 --> <bean id="loveHelper" class="com.spring.aop.LoveHelper"> </bean> <aop:aspectj-autoproxy /> </beans>
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5、写上我们的测试类 测试下效果 嘿嘿~~~
package com.spring.aop; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.spring.aop.Love; public class LoveTest { public static void main(String[] args) { ApplicationContext appCtx = new ClassPathXmlApplicationContext( "applicationContext.xml"); Love love = (Love) appCtx.getBean("person"); love.fallInLove(); try { // 测试异常捕获 love.test(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
6、或者写上Junit测试类
package com.love.test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.spring.aop.Love; import junit.framework.TestCase; public class LoveAopTest extends TestCase { protected void setUp() { /* 开始test前的准备操作:初始化,获取数据连接... */ } protected void tearDown() { /* 完成test后的清理工作:关闭文件, 关闭数据连接... */ } public void testCase2() { ApplicationContext appCtx = new ClassPathXmlApplicationContext( "applicationContext.xml"); Love love = (Love) appCtx.getBean("person"); love.fallInLove(); try { // 测试异常捕获 love.test(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); assertTrue(true); } } }
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7、看控制台输出结果 调用了我们定义的aop拦截方法~~~ ok了
8、源码下载地址:源码下载
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