通过拦截器Interceptor实现Spring MVC中Controller接口访问信息的记录

 1 package com.api.web.interceptor;
 2 
 3 import java.util.Arrays;
 4 import java.util.Date;
 5 import java.util.Map;
 6 import java.util.Map.Entry;
 7 
 8 import javax.servlet.http.HttpServletRequest;
 9 import javax.servlet.http.HttpServletResponse;
10 
11 import org.apache.log4j.Logger;
12 import org.springframework.web.method.HandlerMethod;
13 import org.springframework.web.servlet.HandlerInterceptor;
14 import org.springframework.web.servlet.ModelAndView;
15 
16 import com.yijia.api.util.SimpleDateFormatCache;
17 
18 /**
19  * 记录信息:</br> 访问时间</br>Controller路径</br>对应方法名</br>请求参数信息</br>请求相对路径</br>请求处理时长
20  * 
21  * @author Administrator
22  * 
23  */
24 public class TimeCostInterceptor implements HandlerInterceptor {
25 
26     // before the actual handler will be executed
27     public boolean preHandle(HttpServletRequest request,
28             HttpServletResponse response, Object handler) throws Exception {
29         long startTime = System.currentTimeMillis();
30         request.setAttribute("startTime", startTime);
31         if (handler instanceof HandlerMethod) {
32             StringBuilder sb = new StringBuilder(1000);
33 
34             sb.append("-----------------------").append(SimpleDateFormatCache.getYmdhms().format(new Date()))
35                     .append("-------------------------------------\n");
36             HandlerMethod h = (HandlerMethod) handler;
37             sb.append("Controller: ").append(h.getBean().getClass().getName()).append("\n");
38             sb.append("Method    : ").append(h.getMethod().getName()).append("\n");
39             sb.append("Params    : ").append(getParamString(request.getParameterMap())).append("\n");
40             sb.append("URI       : ").append(request.getRequestURI()).append("\n");
41             System.out.println(sb.toString());
42         }
43         return true;
44     }
45 
46     // after the handler is executed
47     public void postHandle(HttpServletRequest request,
48             HttpServletResponse response, Object handler,
49             ModelAndView modelAndView) throws Exception {
50         long startTime = (Long) request.getAttribute("startTime");
51         long endTime = System.currentTimeMillis();
52         long executeTime = endTime - startTime;
53         if(handler instanceof HandlerMethod){
54             StringBuilder sb = new StringBuilder(1000);
55             sb.append("CostTime  : ").append(executeTime).append("ms").append("\n");
56             sb.append("-------------------------------------------------------------------------------");
57             System.out.println(sb.toString());
58         }
59     }
60 
61     private String getParamString(Map<String, String[]> map) {
62         StringBuilder sb = new StringBuilder();
63         for(Entry<String,String[]> e:map.entrySet()){
64             sb.append(e.getKey()).append("=");
65             String[] value = e.getValue();
66             if(value != null && value.length == 1){
67                 sb.append(value[0]).append("\t");
68             }else{
69                 sb.append(Arrays.toString(value)).append("\t");
70             }
71         }
72         return sb.toString();
73     }
74 
75     public void afterCompletion(HttpServletRequest arg0,
76             HttpServletResponse arg1, Object arg2, Exception arg3)
77             throws Exception {
78 
79     }
80 }

 <mvc:interceptors>
        <!-- 使用bean定义一个Interceptor，直接定义在mvc:interceptors根下面的Interceptor将拦截所有的请求 -->
        <mvc:interceptor>
            <mvc:mapping path="/**"/>            
            <!-- 需排除拦截的地址 -->  
            <mvc:exclude-mapping path="/" />
            <mvc:exclude-mapping path="/test" />
            <!-- 定义在mvc:interceptor下面的表示是对特定的请求才进行拦截的 -->
            <bean class="com.api.web.interceptor.TimeCostInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>