Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported

有时候不服不行，不学好英语就是在菜鸟圈里转啊。。
这个问题用中文搜永远没答案，英文搜索第一条就是答案。。(还是坚持学好英文吧)
https://stackoverflow.com/questions/33796218/content-type-application-x-www-form-urlencodedcharset-utf-8-not-supported-for/38252958#38252958

The problem is that when we use application/x-www-form-urlencoded, Spring doesn't understand it as a RequestBody. So, if we want to use this we must remove the @RequestBody annotation.

Then try the following:

@RequestMapping(value = "/{email}/authenticate", method = RequestMethod.POST,
        consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE, 
        produces = {MediaType.APPLICATION_ATOM_XML_VALUE, MediaType.APPLICATION_JSON_VALUE})
public @ResponseBody  Representation authenticate(@PathVariable("email") String anEmailAddress, MultiValueMap paramMap) throws Exception {
   if(paramMap == null && paramMap.get("password") == null) {
        throw new IllegalArgumentException("Password not provided");
    }
    return null;
}

Note that removed the annotation @RequestBody