拦截器示例之日志记录

最新推荐文章于 2023-07-31 10:28:30 发布

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最新推荐文章于 2023-07-31 10:28:30 发布

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分类专栏： --------【JAVA Web】文章标签：日志记录拦截器

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xxx-servlet.xml配置

<mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**" />
            <bean class="exam.njxzc.Interceptor.AllInterceptor" />
        </mvc:interceptor>
    </mvc:interceptors>

AllInterceptor.java

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;

public class AllInterceptor implements HandlerInterceptor{
    protected Logger logger = LoggerFactory.getLogger(getClass());
    //定义线程本地变量，这里的NamedThreadLocal只是1个带name属性的ThreadLocal：
    private static final ThreadLocal<Long> startTimeThreadLocal =
            new NamedThreadLocal<Long>("ThreadLocal StartTime");

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
            Object handler) throws Exception {
        if (logger.isDebugEnabled()){
            long beginTime = System.currentTimeMillis();//1、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）  
            logger.debug("开始计时: {}  URI: {}", new SimpleDateFormat("hh:mm:ss.SSS")
                .format(beginTime), request.getRequestURI());
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response,
            Object handler, ModelAndView modelAndView) throws Exception {

        if (modelAndView != null){
            logger.info("ViewName: " + modelAndView.getViewName());
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request,
            HttpServletResponse resonse, Object handle, Exception ex)
            throws Exception {
        // 打印JVM信息。
            if (logger.isDebugEnabled()){
                long beginTime = startTimeThreadLocal.get();//得到线程绑定的局部变量（开始时间）  
                long endTime = System.currentTimeMillis();  //2、结束时间  
                logger.debug("计时结束：{}  耗时：{}  URI: {}  最大内存: {}m  已分配内存: {}m  已分配内存中的剩余空间: {}m  最大可用内存: {}m",
                        new Object[]{
                        new SimpleDateFormat("hh:mm:ss.SSS").format(endTime), formatDateTime(endTime - beginTime),
                        request.getRequestURI(), Runtime.getRuntime().maxMemory()/1024/1024, Runtime.getRuntime().totalMemory()/1024/1024, Runtime.getRuntime().freeMemory()/1024/1024, 
                        (Runtime.getRuntime().maxMemory()-Runtime.getRuntime().totalMemory()+Runtime.getRuntime().freeMemory())/1024/1024}); 
            }
    }

    /**
     * 转换为时间（天,时:分:秒.毫秒）
     * @param timeMillis
     * @return
     */
    private static String formatDateTime(long timeMillis){
        long day = timeMillis/(24*60*60*1000);
        long hour = (timeMillis/(60*60*1000)-day*24);
        long min = ((timeMillis/(60*1000))-day*24*60-hour*60);
        long s = (timeMillis/1000-day*24*60*60-hour*60*60-min*60);
        long sss = (timeMillis-day*24*60*60*1000-hour*60*60*1000-min*60*1000-s*1000);
        return (day>0?day+",":"")+hour+":"+min+":"+s+"."+sss;
    }
}

测试运行

03:47:42,507 DEBUG [exam.njxzc.Interceptor.AllInterceptor] -开始计时: 03:47:42.506  URI: /exammanage/listrooms.do
03:47:42,939  INFO [exam.njxzc.Interceptor.AllInterceptor] -ViewName: jsonView
03:47:42,959 DEBUG [exam.njxzc.Interceptor.AllInterceptor] -计时结束：03:47:42.958  耗时：0:0:0.452  URI: /exammanage/listrooms.do  最大内存: 247m  已分配内存: 168m  已分配内存中的剩余空间: 79m  最大可用内存: 159m