新手入门：web项目控制台显示信息教程（对于新手开发，本地测试都很有用）

骑猪看日落 2022-06-01 23:52 107阅读 0赞

web项目控制台显示信息教程（对于新手开发，本地测试都很有用）

效果如图显示：![20171227132559071][]

环境 spring mvc 框架底下实现

（1）首先创建一个类代码如下：

package com.wmc.web.interceptor;
    import java.util.Arrays;
    import java.util.Date;
    import java.util.Map;
    import java.util.Map.Entry;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.web.method.HandlerMethod;
    import org.springframework.web.servlet.ModelAndView;
    import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    
    
    public class MethodFilter extends HandlerInterceptorAdapter  {
       private final static Logger logger = LoggerFactory.getLogger(MethodFilter.class);
    
       public void afterCompletion(HttpServletRequest arg0,
             HttpServletResponse arg1, Object arg2, Exception arg3)
             throws Exception {
       }
    
       public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
             Object arg2, ModelAndView arg3) throws Exception {
          try {
             long XY_RunStartTime = (Long) arg0.getAttribute("XY_RunStartTime");
             long XY_RunEndTime = System.currentTimeMillis();
             long XY_ExecuteTime = XY_RunEndTime - XY_RunStartTime;
             if (arg2 instanceof HandlerMethod) {
                logger.info("耗时时间:{}ms", XY_ExecuteTime);
             }
          } catch (Exception e) {
             logger.warn("", e);
          }
       }
       public boolean preHandle(HttpServletRequest request, HttpServletResponse arg1,
             Object arg2) throws Exception {
    
          try {
             long XY_RunStartTime = System.currentTimeMillis();
             request.setAttribute("XY_RunStartTime", XY_RunStartTime);
    
             if (arg2 instanceof HandlerMethod) {
                HandlerMethod h = (HandlerMethod) arg2;
    
                if(h.getBean().getClass().getName().indexOf("$")>0){
                   logger.info("请求类:{}", h.getBean().getClass().getName().substring(0, h.getBean().getClass().getName().indexOf("$")));
                }else{
                   logger.info("请求类:{}", h.getBean().getClass().getName());
                }
                logger.info("请求参数:{}", getParamString(request.getParameterMap()));
             }
             logger.info("请求方法:{}", request.getServletPath());
          } catch (Exception e) {
             logger.warn("", e);
          }
    
          return true;
       }
       private String getParamString(Map<String, String[]> map) {
                 StringBuilder sb = new StringBuilder();
                  for(Entry<String,String[]> e:map.entrySet()){
                          sb.append(e.getKey()).append("=");
                        String[] value = e.getValue();
                         if(value != null && value.length == 1){
                                 sb.append(value[0]).append("\t");
                             }else{
                                 sb.append(Arrays.toString(value)).append("\t");
                            }
                      }
                  return sb.toString();
               }
       
       
    }

（2 ）配置一个过滤器 在Spring mvc xml文件中，代码如下

<**mvc****:interceptors**>

**<**mvc****:interceptor**><**mvc****:mapping****path****="/\*\*"**/>

<**mvc****:exclude-mapping****path****="/static/\*\*"**/>

<**bean****class****="com.wmc.web.interceptor.MethodFilter"**/></**mvc****:interceptor**>

</mvc:interceptors>

(3)重新启动服务器就好了。 这个时候你会在控制台看到你所调用的URL,传递参数等一系列你想要信息

希望能帮到大家。大家如果有兴趣可以来我的网站看看:[www.jiegelo.com][]

[20171227132559071]: /images/20220602/b59e808b3b0e4d838e17807f47c2d813.png
[www.jiegelo.com]: http://www.jiegelo.com