spring aop记录Web系统操作日志

[color=red]blog迁移至[/color]:[url=http://www.micmiu.com]http://www.micmiu.com[/url]

在建的项目需要实现一个详细记录操作日志的需求：[color=red]即哪个用户在什么时间做了什么操作[/color]，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：[color=blue]SSH 即[Spring（v2）、struts（v1）、hibernate（v3）][/color]
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：【[color=red]只是初步设计，如果要记录到数据库，注入相应的service即可[/color]】
[color=blue]前置消息：LogBeforeAdvice.java[/color]

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);

    }
}

[color=blue]后置消息：LogAfterAdvice.java[/color]

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);
    }
}

[color=blue]spring配置文件部分代码[/color]

<!-- 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>

[color=blue]部分日志信息：[/color]
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