java - Why this Spring MVC controller returns corrupted UTF-8 String? -

java - Why this Spring MVC controller returns corrupted UTF-8 String? -

i have modified many places create spring mvc work utf-8, including char filter, contexttype in jsp, , fixed mysql well, project working utf-8.

however, newly added function wouldn't right

@requestmapping(value = "/uploadfile", method = requestmethod.post, produces = "text/plain;charset=utf-8") public @responsebody string uploadfilehandler( @requestparam("name") string name, @requestparam("type") string type, @requestparam("file") multipartfile file//, httpservletresponse response ) throws ioexception { // response.setcharacterencoding("utf-8"); if (file.isempty()) homecoming "Ｅｍｐｔｙ";

as can see, have set procudes, , setcharacterencoding. returned string used in ajax , have

var ajax = new xmlhttprequest(); ajax.overridemimetype('text/xml;charset=utf-8');

here origin of form in jsp

<form name = "myform" method="post" onsubmit="return validateform()" enctype="multipart/form-data">

but webpage still shows ????. else missing? don't have jquery, hoping solution without using unless must.

found link responsebody problem homecoming utf-8 string due spring web "bug"

summary:

set org.springframework.web.filter.characterencodingfilter in web.xml enforce utf-8 set <value>text/plain;charset=utf-8</value> in spring-servlet.xml stringhttpmessageconverter problem eliminated creating own class

java ajax spring-mvc utf-8