Pratique de développement Java : springMVC utilise AOP pour gérer les journaux d'accès

<aop:aspectj-autoproxy proxy-target-class="true" />

package com.t1heluosh1.system.log.annotion;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * 日志controller层注解
 * 
 * @author xuyong
 *
 */
//作用于参数和方法上
@Target({ElementType.PARAMETER, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface SysControllerLog {

	int logType() default 100;				//日志类型，默认为100-系统
	
	int module() default 100;				//操作模块，默认为100-登录
	
	String description() default "";		//操作描述
}

<context:component-scan base-package="com.t1heluosh1.system.log" >
         <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

package com.t1heluosh1.system.log.aspect;

import java.lang.reflect.Method;
import java.util.Date;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import com.t1heluosh1.pullulate.biz.sysLog.service.SysLogService;
import com.t1heluosh1.pullulate.biz.sysLog.vo.SysLogVo;
import com.t1heluosh1.pullulate.biz.user.model.User;
import com.t1heluosh1.system.constant.SysParams;
import com.t1heluosh1.system.log.annotion.SysControllerLog;
import com.t1heluosh1.util.IPUtil;


/**
 * 日志切点类即实现类
 * 
 * @author xuyong
 *
 */
@Aspect  
@Component 
public class SysLogAspect {

	//本地异常日志记录对象
	private static final Logger logger = Logger.getLogger(SysLogAspect.class);
	
	@Resource
	private SysLogService logService;
	
	
	//切入点定义：controller
	@Pointcut("@annotation(com.t1heluosh1.system.log.annotion.SysControllerLog)")
	public void controllerAspect() {
		System.out.println("---------------------controllerAspect for log start----------------------------");
	}
	
	
	
	/**
	 * controller切入点方法实现
	 * 
	 * @param joinPoint
	 */
	@Before("controllerAspect()")
	public void doBefore(JoinPoint joinPoint) {
		 HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder  
	                .getRequestAttributes()).getRequest();
		 
		 //获取登录用户的信息
		 User user = (User)request.getSession().getAttribute(SysParams.CURRENT_USER);
		 
		 //获取请求IP地址
		 String ip = IPUtil.getRemoteHost(request);
		 
		 try {
			 String methodDesc = getControllerMethodDescription(joinPoint);
			 System.out.println("request method : " + joinPoint.getTarget().getClass().getName()+"."+joinPoint.getSignature().getName()+"()");
			 System.out.println("method description : " + methodDesc);
			 System.out.println("request username : " + (user==null?"no login info found":user.getUserName()));
			 
			 System.out.println("request ip address : "+ ip);
			 
			 System.out.println("insert log infos into db start ...");
			 
			 //获取相关日志参数
			 Object[] orgs = joinPoint.getArgs();
			 SysLogVo sysLogVo = null;
			 if (orgs != null && orgs.length > 0) {
				 for (Object obj:orgs) {
					 if (obj instanceof SysLogVo)
						 sysLogVo = (SysLogVo)obj;
					 
				 }
			 }
			 if (sysLogVo == null) {
				 sysLogVo = new SysLogVo();
			 }
			 //执行日志入库操作
			 
			 //获取注解的信息
			 MethodSignature ms = (MethodSignature)joinPoint.getSignature();
			 Method method = ms.getMethod();
			 SysControllerLog log = method.getAnnotation(SysControllerLog.class);
			 sysLogVo.setLogType(log.logType());
			 sysLogVo.setModule(log.module());
			 sysLogVo.setIpAddr(ip);
			 sysLogVo.setUrl(request.getRequestURI());
			 sysLogVo.setMethodName(joinPoint.getTarget().getClass().getName()+"."+joinPoint.getSignature().getName()+"()");
			 sysLogVo.setMethodDesc(methodDesc);
			 //TODO:remark可根据业务来进行改变，暂时为方法描述
			 sysLogVo.setRemark(log.description());
			 Date date = new Date();
			 sysLogVo.setAddTime(date);
			 sysLogVo.setAddUser(user==null?SysParams.ADMIN_ID:String.valueOf(user.getId()));
			 sysLogVo.setUpdateTime(date);
			 sysLogVo.setUpdateUser(user==null?SysParams.ADMIN_ID:String.valueOf(user.getId()));
			 logService.save(sysLogVo);
			 System.out.println("insert log infos into db successful.");
		 } catch (Exception e) {
			 logger.error("--------------controllerAspect for log fail-----------------------");  
	         logger.error("exception info : ", e);  
		 }
		 
	}
	
	 
	/**
	 * 获取方法的描述
	 * 
	 * @param joinPoint
	 * @return
	 * @throws Exception 
	 */
	@SuppressWarnings("rawtypes")
	private String getControllerMethodDescription(JoinPoint joinPoint) throws Exception {
		 //获取目标类名  
        String targetName = joinPoint.getTarget().getClass().getName();  
        //获取方法名  
        String methodName = joinPoint.getSignature().getName();  
        //获取相关参数  
        Object[] arguments = joinPoint.getArgs();  
        //生成类对象  
        Class targetClass = Class.forName(targetName);  
        //获取该类中的方法  
        Method[] methods = targetClass.getMethods();  
          
        String description = "";  
          
        for(Method method : methods) {  
            if(!method.getName().equals(methodName)) {  
                continue;  
            }  
            Class[] clazzs = method.getParameterTypes();  
            if(clazzs.length != arguments.length) {  
                continue;  
            }  
            description = method.getAnnotation(SysControllerLog.class).description();  
        }  
        return description;  
	}
	
	
}