the request doesn't contain a multipart/form-data or multipart/form-data stream, content type header is application/x-javascript; charset=utf-8
设置了con.setRequestProperty("Content-Type","multipart/form-data;boundary="+boundary);
服务器还是出现the request doesn't contain a multipart/form-data or multipart/form-data stream, content type header is application/x-javascript; charset=utf-8问题
