Spring+AOP+Log4j 用注解的方式记录指定某个方法的日志
一、spring aop execution表达式说明
在使用spring框架配置AOP的时候,不管是通过XML配置文件还是注解的方式都需要定义pointcut"切入点"
例如定义切入点表达式 execution(* com.sample.service.impl..*.*(..))
execution()是最常用的切点函数,其语法如下所示:
整个表达式可以分为五个部分:
1、execution(): 表达式主体。
2、第一个*号:表示返回类型,*号表示所有的类型。
3、包名:表示需要拦截的包名,后面的两个句点表示当前包和当前包的所有子包,com.sample.service.impl包、子孙包下所有类的方法。
4、第二个*号:表示类名,*号表示所有的类。
5、*(..):最后这个星号表示方法名,*号表示所有的方法,后面括弧里面表示方法的参数,两个句点表示任何参数。
二、程序
1.要记录日志的某个方法: updatePromote
/** * 修改商品活动 * @param vo * @param promoteId为,AOP监控的查询ID * @return * @throws Exception */ public ResultVO updatePromote(PromoteVO vo,Long promoteId)throws Exception;
2.增加一个横切关注点,打印日志,Java类为
package com.fortis.drugstore.web.userdbThrift.aop; import java.util.Date; import org.apache.log4j.Logger; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.After; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.aspectj.lang.annotation.Pointcut; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import com.fortis.drugstore.base.action.BaseAction; import com.fortis.drugstore.system.utils.SessionInfo; import com.fortis.drugstore.web.userdbThrift.activity.service.PromoteService; import com.fortis.thrift.userdb.PromoteVO; //声明这是一个组件 @Component //声明这是一个切面Bean @Aspect public class ServiceAspect extends BaseAction<Object>{ private static final long serialVersionUID = 7690224540336380592L; private final static Logger log = Logger.getLogger(ServiceAspect.class); @Autowired private PromoteService service; //配置切入点,该方法无方法体,主要为方便同类中其他方法使用此处配置的切入点 @Pointcut("execution(* com.fortis.drugstore.web.userdbThrift.activity.service.impl..PromoteServiceImpl.updatePromote(..))") public void aspect(){ } /* * 配置前置通知,使用在方法aspect()上注册的切入点 * 同时接受JoinPoint切入点对象,可以没有该参数 */ @Before("aspect()") public void before(JoinPoint joinPoint){ PromoteVO obBefore = new PromoteVO(); Object []param = joinPoint.getArgs(); if(log.isInfoEnabled()){ Object promoteId = param[1]; //切点中有两个参数,第二个为表的主键,用于查询 SessionInfo sessionInfo = (SessionInfo) getSession().getAttribute("sessionInfo"); try { obBefore = service.queryPromoteDetail(Long.valueOf(promoteId.toString())); } catch (Exception e) { e.printStackTrace(); } log.info("【修改活动数据】:"+new Date()+" 【账号】:"+sessionInfo.getUserAcct()+" 【名称】:"+sessionInfo.getUserName()); log.info("修改之前:"+obBefore.toString()); } } //配置后置通知,使用在方法aspect()上注册的切入点 @After("aspect()") public void after(JoinPoint joinPoint){ PromoteVO obAfter = new PromoteVO(); Object []param = joinPoint.getArgs(); if(log.isInfoEnabled()){ Object promoteId = param[1]; try { obAfter = service.queryPromoteDetail(Long.valueOf(promoteId.toString())); } catch (Exception e) { e.printStackTrace(); } log.info("修改之后:"+obAfter.toString()); } } }
3.spring aop的配置文件 spring-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:aop="http://www.springframework.org/schema/aop" xmlns:c="http://www.springframework.org/schema/c" xmlns:cache="http://www.springframework.org/schema/cache" xmlns:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:lang="http://www.springframework.org/schema/lang" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" xmlns:task="http://www.springframework.org/schema/task" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"> <!-- 激活自动代理功能 --> <aop:aspectj-autoproxy proxy-target-class="true"/> </beans>