Get request in Spring MVC

How does spring MVC get the request?
There are the following ways:
method One: Inject request in action
Add HttpServletRequest request directly to the action parameter
For example

/*** * Returns JSON * @param ID * @param rolelevel * @param model * @para  M Request * @param targetview * @return * @throws SecurityException *  @throws nosuchfieldexception * @throws illegalargumentexception * @throws Illegalacce Ssexception * *    @ResponseBody    @RequestMapping(Value ="/{id}/update/json", Method=requestmethod.post) PublicStringjson_update(@PathVariableintId,t rolelevel, Model model,httpservletrequest request,string TargetView)throwsSecurityException, Nosuchfieldexception, IllegalArgumentException, illegalaccessexception {Booleansuccess= Updatecommon (ID, rolelevel, model, request); Map map=NewHashMap ();if(!success) {Map.put (Constant2.login_result_key,false); Map.put (Constant2.response_key_error_message,"Record not found, ID:"+ID);returnHWUTILS.GETJSONP (map); }returnConstant2.response_right_result; }

mode two: Use Requestcontextholder
HttpServletRequest request = ((servletrequestattributes) requestcontextholder.getrequestattributes ()). GetRequest () ;

protectedgetDao() {        if(this.dao==null){            System.out.println("请先执行init(request)");            HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();            init(request);        }        returnthis.dao;    }

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Get request in Spring MVC