SPRINGMVC using Handlerexceptionresolver for global exception handling

Today we use the exception handling in the SPRINGMVC, which is recorded here and will be used later.

Spring MVC provides a handlerexceptionresolver interface that can be used for uniform exception handling.

The actual code of the project is as follows:

 Packageorg.jeecgframework.core.common.exception;Importjava.io.IOException;ImportJava.io.PrintWriter;ImportJava.io.StringWriter;ImportJava.util.HashMap;ImportJava.util.Map;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse;ImportOrg.apache.log4j.Logger;ImportOrg.jeecgframework.core.common.model.json.AjaxJson;ImportOrg.jeecgframework.core.util.ExceptionUtil;ImportOrg.jeecgframework.core.util.JSONHelper;Importorg.jeecgframework.core.util.oConvertUtils;ImportOrg.jeecgframework.web.system.service.SystemService;Importorg.springframework.beans.factory.annotation.Autowired;Importorg.springframework.stereotype.Component;ImportOrg.springframework.web.servlet.HandlerExceptionResolver;ImportOrg.springframework.web.servlet.ModelAndView;/*** Spring MVC Global Handling exception capture distinguishes between Ajax and ordinary requests based on requests, responding separately. * First, the exception information is output to the log. * Second, the first 50 characters to intercept the exception details are written to the T_s_log in the log table. */@Component Public classGlobalexceptionresolverImplementsHandlerexceptionresolver {@AutowiredPrivateSystemservice Systemservice; //Logging log Information    Private Static FinalLogger log =Logger. GetLogger (globalexceptionresolver.class); //Record database maximum character length    Private Static Final intWirte_db_max_length = 1500; //Record database maximum character length    Private Static Final  ShortLog_level = 6; //Record database maximum character length    Private Static Final  Shortlog_opt = 3; /*** Unified Processing of exception information, distinguish between asynchronous and synchronous requests, respectively processing*/     PublicModelandview resolveexception (httpservletrequest request, httpservletresponse response, Object handler, Ex Ception ex) {BooleanIsajax =Isajax (Request,response); Throwable deepestexception=Deepestexception (ex); returnprocessexception (Request, response, Handler, deepestexception, Isajax); }    /*** Determines whether the current request is an asynchronous request. */    Private BooleanIsajax (httpservletrequest request, httpservletresponse response) {returnOconvertutils.isnotempty (Request.getheader ("X-requested-with")); }    /*** Get the original source of the anomaly, the place where the exception was originally thrown*/    Privatethrowable deepestexception (Throwable e) {throwable tmp=e; intBreakpoint = 0;  while(Tmp.getcause ()! =NULL){            if(Tmp.equals (Tmp.getcause ())) { Break; } tmp=Tmp.getcause (); Breakpoint++; if(breakpoint>1000){                 Break; }        }         returntmp; }    /*** Handle Exceptions. * @paramRequest *@paramResponse *@paramHandler *@paramdeepestexception *@paramIsajax *@return     */    PrivateModelandview processexception (httpservletrequest request, httpservletresponse response, Object handler, Throwable EX,BooleanIsajax) {        //Step One, the exception information is logged in the log file.Log.error ("Global handling Exception Capture:", ex); //Step Two, the exception information records intercepted the first 50 characters written to the database.Logdb (ex); //step three, the ordinary request and AJAX requests are processed separately.        if(isajax) {returnProcessajax (REQUEST,RESPONSE,HANDLER,EX); }Else{            returnProcessnotajax (REQUEST,RESPONSE,HANDLER,EX); }    }    /*** Exception information record intercepts the first 50 characters written in the database *@paramex*/    Private voidLogdb (Throwable ex) {//String exceptionmessage = Getthrowablemessage (ex);String exceptionmessage = "Error exception:" +ex.getclass (). Getsimplename () + ", error description:" +Ex.getmessage (); if(Oconvertutils.isnotempty (exceptionmessage)) {if(Exceptionmessage.length () >wirte_db_max_length) {Exceptionmessage= exceptionmessage.substring (0, wirte_db_max_length);    }} systemservice.addlog (Exceptionmessage, Log_level, log_opt); }    /*** Ajax exception handling and return. * @paramRequest *@paramResponse *@paramHandler *@paramdeepestexception *@return     */    PrivateModelandview Processajax (httpservletrequest request, httpservletresponse response, Object handler, Throwable deepestexception) {Modelandview empty=NewModelandview (); //Response.setcontenttype ("Application/json");Response.setheader ("Cache-control", "No-store"); Ajaxjson JSON=NewAjaxjson (); Json.setsuccess (true);        Json.setmsg (Deepestexception.getmessage ()); PrintWriter PW=NULL; Try{PW=Response.getwriter ();            Pw.write (Jsonhelper.bean2json (JSON));        Pw.flush (); } Catch(IOException e) {e.printstacktrace (); }finally{pw.close ();        } empty.clear (); returnempty; }    /*** Normal page exception handling and return. * @paramRequest *@paramResponse *@paramHandler *@paramdeepestexception *@return     */    PrivateModelandview Processnotajax (httpservletrequest request, httpservletresponse response, Object handler, Thro Wable ex) {String exceptionmessage=Getthrowablemessage (ex); Map<string, object> model =NewHashmap<string, object>(); Model.put ("Exceptionmessage", Exceptionmessage); Model.put ("Ex", ex); return NewModelandview ("Common/error", model); }    /*** return error message String * *@paramex * Exception *@returnerror message string*/     PublicString Getthrowablemessage (Throwable ex) {StringWriter SW=NewStringWriter (); PrintWriter PW=NewPrintWriter (SW);        Ex.printstacktrace (PW); returnsw.tostring (); }}。 

Spring-mvc.xml configuration:

<!---    < id = "Exceptionhandler"         class = "Org.jeecgframework.core.common.exception.GlobalExceptionResolver" />

This article transferred from: http://blog.csdn.net/wuqiwei521/article/details/71191505

SPRINGMVC using Handlerexceptionresolver for global exception handling