在建的项目需要实现一个详细记录操作日志的需求：即哪个用户在什么时间做了什么操作，需要把这些日志记录到数据库，提供相应的用户查询、统计以及做一些日志审核。
项目的基本架构：SSH 即[Spring（v2）、struts（v1）、hibernate（v3）]
为了减小在建项目人力成本、降低修改程度、降低系统的耦合性，同时该项目spring配置中定义的Action bean的名称比较规范统一，所以就考虑用Spring AOP来完成日志记录。
代码及详细配置如下：【只是初步设计，如果要记录到数据库，注入相应的service即可】
前置消息：LogBeforeAdvice.java
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package aoplog; import java.lang.reflect.Method; import javax.servlet.http.HttpServletRequest; import org.apache.commons.lang.StringUtils; import org.apache.log4j.Logger; import org.springframework.aop.MethodBeforeAdvice; import domain.UserAccount; /** * * @author Michael */ public class LogBeforeAdvice implements MethodBeforeAdvice { /** * Logger for this class */ private static final Logger logger = Logger .getLogger(LogBeforeAdvice.class); /** * @param method * @param args * @param target * @throws Throwable */ public void before(Method method, Object[] args, Object target) throws Throwable { UserAccount curUser = null; String methodName = "execute"; for (Object obj : args) { if (null == obj) { continue; } if (obj instanceof HttpServletRequest) { HttpServletRequest request = (HttpServletRequest) obj; curUser = (UserAccount) request.getSession().getAttribute( "HUAXIA_CURRENT_USER"); if (StringUtils.isNotEmpty(request.getParameter("method"))) { methodName = request.getParameter("method"); } } } if (null == curUser) { logger.info("can not get session user."); } else { logger.info("operate user:" + curUser.getUserID()); } logger.info("logging before advice. class:" + target.getClass().getSimpleName() + " method:" + methodName); } } |
后置消息：LogAfterAdvice.java
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package aoplog; import java.lang.reflect.Method; import javax.servlet.http.HttpServletRequest; import org.apache.commons.lang.StringUtils; import org.apache.log4j.Logger; import org.springframework.aop.AfterReturningAdvice; import domain.UserAccount; /** * @author Michael */ public class LogAfterAdvice implements AfterReturningAdvice { /** * Logger for this class */ private static final Logger logger = Logger.getLogger(LogAfterAdvice.class); /** * @param returnObj * @param method * @param args * @param target * @throws Throwable */ public void afterReturning(Object returnObj, Method method, Object[] args, Object target) throws Throwable { UserAccount curUser = null; String methodName = "execute"; for (Object obj : args) { if (null == obj) { continue; } if (obj instanceof HttpServletRequest) { HttpServletRequest request = (HttpServletRequest) obj; curUser = (UserAccount) request.getSession().getAttribute( "HUAXIA_CURRENT_USER"); if (StringUtils.isNotEmpty(request.getParameter("method"))) { methodName = request.getParameter("method"); } } } if (null == curUser) { logger.info("can not get session user."); } else { logger.info("operate user:" + curUser.getUserID()); } logger.info("logging after advice. return obj:" + returnObj); logger.info("logging after advice. class:" + target.getClass().getSimpleName() + " method:" + methodName); } } |
spring配置文件部分代码：
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<!-- aop log cfg 自动代理 --> <bean name="logBefore" class="aoplog.LogBeforeAdvice"></bean> <bean name="logAfter" class="aoplog.LogAfterAdvice"></bean> <bean name="loggerAutoProxy" class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"> <property name="beanNames"> <list> <value>*Action</value> <value>*Logout</value> </list> </property> <property name="interceptorNames"> <list> <value>logBefore</value> <value>logAfter</value> </list> </property> </bean> |
部分日志信息：
INFO – LogBeforeAdvice.before(51) | operate user:admin
INFO – LogBeforeAdvice.before(53) | logging before advice.
class:UserAccountMainAction method:displayUserAccountMainScreen
INFO – LogAfterAdvice.afterReturning(51) | operate user:admin
INFO – LogAfterAdvice.afterReturning(53) | logging after advice.
returnobj:ForwardConfig[name=UserAccountMain.screen,
path=/UserAccountMain.jsp,redirect=false,contextRelative=false,module=null]
INFO – LogAfterAdvice.afterReturning(54) | logging after advice.
class:UserAccountMainAction method:displayUserAccountMainScreen
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