• 使用spring拦截器实现日志管理


    使用HandlerInterceptor拦截器,可以拦截请求,实现通用的日志管理操作

    一、添加拦截器类

    在"src/main/java"代码文件夹的"org.xs.demo1"的包下新建"LogInterceptor.java"类:

    /**
     * Copyright © 2012-2014 <a href="https://github.com/thinkgem/jeesite">JeeSite</a> All rights reserved.
     */
    package org.xs.demo1;
     
    import java.text.SimpleDateFormat;
     
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
     
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.core.NamedThreadLocal;
    import org.springframework.web.servlet.HandlerInterceptor;
    import org.springframework.web.servlet.ModelAndView;
     
    /**
     * 日志拦截器
     * @author ThinkGem
     */
    public class LogInterceptor implements HandlerInterceptor {
     
        private final Logger log = LoggerFactory.getLogger(getClass().getName());
         
        private static final ThreadLocal<Long> startTimeThreadLocal = new NamedThreadLocal<Long>("ThreadLocal StartTime");
         
        /** 
         * 预处理
         */
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
             
            long beginTime = System.currentTimeMillis(); //开始时间  
            startTimeThreadLocal.set(beginTime); //线程绑定变量(该数据只有当前请求的线程可见)  
            log.info("开始计时: {}", new SimpleDateFormat("hh:mm:ss.SSS").format(beginTime));
             
            return true;
        }
     
        /**
         * 返回处理
         */
        @Override
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
            if (modelAndView != null){
                log.info("ViewName: " + modelAndView.getViewName());
            }
        }
     
        /**
         * 后处理
         */
        @Override
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
     
            // 保存日志
            //LogUtils.saveLog(request, handler, ex, null);
             
            // 输出日志信息
            log.info("访问地址:" + request.getRequestURI() + ",执行方式:" + request.getMethod());
             
            long beginTime = startTimeThreadLocal.get(); //得到线程绑定的局部变量(开始时间)  
            long endTime = System.currentTimeMillis(); //结束时间  
            log.info("计时结束:{}", new SimpleDateFormat("hh:mm:ss.SSS").format(endTime)); 
        }
    }
    

    二、修改配置文件

    修改spring-mvc.xml件,加入:

    <!-- 拦截器配置 -->
    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**" />
            <bean class="org.xs.demo1.LogInterceptor" />
        </mvc:interceptor>
    </mvc:interceptors>
    

    三、运行测试

    访问"http://localhost:8080/demo1/hello/list2"地址

    可以看到拦截器中输出的日志信息了

    实例代码地址:https://github.com/ctxsdhy/cnblogs-example

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  • 原文地址:https://www.cnblogs.com/ctxsdhy/p/6421067.html
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