spring_aop_annotaion

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demo:

description:注解方式实现aop

Aspect.java

/** *切面 */@Component@org.aspectj.lang.annotation.Aspectpublic class Aspect {        private Logger logger = Logger.getLogger(Aspect.class);        @Pointcut(value="execution(* com.asarja.aop.annotation.*.*(..))")    public void pointcut(){            }        /**     * 前置通知     */    @Before(value="execution(* com.asarja.aop.annotation.*.*(..))")    public void doBefore(JoinPoint jp){        logger.debug("before "+jp.getTarget().getClass().getName()+"."+jp.getSignature().getName()+" execute");    }        /**     * 后置通知     */    @After(value="execution(* com.asarja.aop.annotation.*.*(..))")    public void doAfter(JoinPoint jp){        logger.debug("finally after "+jp.getTarget().getClass().getName()+"."+jp.getSignature().getName()+" execute");    }        /**     * 环绕通知     */    @Around(value="execution(* com.asarja.aop.annotation.*.*(..))")    public void doAround(ProceedingJoinPoint pjp) throws Throwable{        logger.debug("around before "+pjp.getTarget().getClass().getName()+"."+pjp.getSignature().getName()+" execute");        pjp.proceed();        logger.debug("around after "+pjp.getTarget().getClass().getName()+"."+pjp.getSignature().getName()+" execute");    }        /**     * 后置返回通知     */    @AfterReturning(value="execution(* com.asarja.aop.annotation.*.*(..))")    public void doAfterRetuning(JoinPoint jp){        logger.debug("after return "+jp.getTarget().getClass().getName()+"."+jp.getSignature().getName()+" execute");    }        /**     * 抛出异常后通知     */    @AfterThrowing(value="execution(* com.asarja.aop.annotation.*.*(..))",throwing="e")    public void doThrowing(JoinPoint jp, Throwable e){        logger.debug("after throwing "+jp.getTarget().getClass().getName()+"."+jp.getSignature().getName()+" execute");        logger.debug(e.getMessage());    }    }

Dao.java

public interface Dao<T> {        void save(T t);        void select(T t);        void delete(T t);}

DaoImpl.java

@Componentpublic class DaoImpl implements Dao<Mp3>{    @Override    public void save(Mp3 t) {        if(t.getId().equals(1)){            throw new RuntimeException("save() 运行时异常");        }        System.out.println("execute save()");    }    @Override    public void select(Mp3 t) {        System.out.println("execute select()");    }    @Override    public void delete(Mp3 t) {        System.out.println("execute delete()");    }}

Mp3.java

public class Mp3 implements Serializable{    private static final long serialVersionUID = 1L;    private Integer id;        private String url;    public Mp3() {    }    public Mp3(Integer id, String url) {        this.id = id;        this.url = url;    }    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    public String getUrl() {        return url;    }    public void setUrl(String url) {        this.url = url;    }        }

applicationContext-aop.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: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-3.0.xsd               http://www.springframework.org/schema/context               http://www.springframework.org/schema/context/spring-context-3.0.xsd           http://www.springframework.org/schema/aop               http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"    default-autowire="byName">       <context:component-scan base-package="com.asarja.aop.annotation" />   <!-- 打开aop注解 -->   <aop:aspectj-autoproxy />    </beans>

Test.java

public class Test {    public static void main(String[] args) {        ApplicationContext context = new ClassPathXmlApplicationContext("com/asarja/aop/annotation/applicationContext-aop.xml");        Dao<Mp3> dao = (Dao<Mp3>)context.getBean("daoImpl");        dao.delete(new Mp3(2,"http://,,,,,"));        dao.select(new Mp3(1,"http://,,,,,"));        dao.save(new Mp3(1,"http://,,,,,"));    }}

结果：

2013-04-09 16:32:13,535 [main] DEBUG com.asarja.aop.annotation.Aspect - before com.asarja.aop.annotation.DaoImpl.delete execute
2013-04-09 16:32:13,535 [main] DEBUG com.asarja.aop.annotation.Aspect - around before com.asarja.aop.annotation.DaoImpl.delete execute
execute delete()
2013-04-09 16:32:13,536 [main] DEBUG com.asarja.aop.annotation.Aspect - finally after com.asarja.aop.annotation.DaoImpl.delete execute
2013-04-09 16:32:13,536 [main] DEBUG com.asarja.aop.annotation.Aspect - around after com.asarja.aop.annotation.DaoImpl.delete execute
2013-04-09 16:32:13,536 [main] DEBUG com.asarja.aop.annotation.Aspect - after return com.asarja.aop.annotation.DaoImpl.delete execute
2013-04-09 16:32:13,537 [main] DEBUG com.asarja.aop.annotation.Aspect - before com.asarja.aop.annotation.DaoImpl.select execute
2013-04-09 16:32:13,537 [main] DEBUG com.asarja.aop.annotation.Aspect - around before com.asarja.aop.annotation.DaoImpl.select execute
execute select()
2013-04-09 16:32:13,537 [main] DEBUG com.asarja.aop.annotation.Aspect - finally after com.asarja.aop.annotation.DaoImpl.select execute
2013-04-09 16:32:13,537 [main] DEBUG com.asarja.aop.annotation.Aspect - around after com.asarja.aop.annotation.DaoImpl.select execute
2013-04-09 16:32:13,537 [main] DEBUG com.asarja.aop.annotation.Aspect - after return com.asarja.aop.annotation.DaoImpl.select execute
2013-04-09 16:32:13,537 [main] DEBUG com.asarja.aop.annotation.Aspect - before com.asarja.aop.annotation.DaoImpl.save execute
2013-04-09 16:32:13,538 [main] DEBUG com.asarja.aop.annotation.Aspect - around before com.asarja.aop.annotation.DaoImpl.save execute
2013-04-09 16:32:13,538 [main] DEBUG com.asarja.aop.annotation.Aspect - finally after com.asarja.aop.annotation.DaoImpl.save execute
2013-04-09 16:32:13,538 [main] DEBUG com.asarja.aop.annotation.Aspect - after throwing com.asarja.aop.annotation.DaoImpl.save execute
2013-04-09 16:32:13,538 [main] DEBUG com.asarja.aop.annotation.Aspect - save() 运行时异常