JQuery Ajax Request Submission Background getparameter receive no data

A summary of the problems encountered today

jquery's $ajax ({

　　contentType: "Application/json",//content encoding type when sending information to the server.

})

When such a method is submitted, if the specified contenttype is Application/json, then the background through the traditional getparameter ("attribute name") can not get the data passed by the front end,

At this point you need to use

http://blog.csdn.net/mhmyqn/article/details/25561535 the method here to get it back; The code is as follows:

privatestring getrequestpayload (httpservletrequest req) {STRINGBUILDERSB=NewStringBuilder (); Try(Bufferedreaderreader =Req.getreader ();) {                            Char[]buff =New Char[1024];                            Intlen;  while(len = reader.read (buff))! =-1) {sb.append (buff,0, Len); }                   }Catch(IOException e) {e.printstacktrace ();         } returnsb.tostring (); }

I'm using the jquery version is 1.10, is not required to specify Content-type, it will be used by default: content-type:application/x-www-form-urlencoded

My problem is to set up the Content-type, and take the getparameter way to take the value, so it will not be taken;

JQuery Ajax Request Submission Background getparameter receive no data