除非@RequestParam"required = false",否则Spring不接受POST参数

Question

我正在运行Spring 3.1.2应用程序.我有一个RESTful servlet,有许多方法.GET方法工作得非常好(@PathVariables匹配,响应正确地编组为基于Accept标头的JSON或XML等)100%的时间.

但是POST方法根本不起作用.经过几个小时的捣乱与皈依者以及我能找到的所有其他春天方面(所有修修补补),我把它缩小到required现场@RequestParam.这是我用来调查的简化测试方法:

@RequestMapping (value = "/bogus",
                 method = POST)
public @ResponseBody PassResponse bogus (
            @RequestParam (value = "test", required = false) String test) {
    // Just some handy garbage objects that marshal to JSON/XML
    UserResponse user = new UserResponse ();
    user.setName (test);
    AccountDetail detail = new AccountDetail (user,null);
    return new PassResponse (detail);
}

required = false:一切正常(参数被接收和解释).正如我所期望的那样

required = true :(或未指定,因为这是默认值)我一直收到消息" MissingServletRequestParameterException:Required String parameter'test'不存在 "

客户端视图:

需要= TRUE

Request URL:http://localhost:8080/internal-project/rest/bogus
Request Method:POST
Status Code:400 Bad Request
Request Headersview source
Accept:application/json
Connection:keep-alive
Content-Length:12
Host:localhost:8080
Request Payload
test=LALALAA
Response Headersview source
Connection:close
Content-Length:971
Content-Type:text/html;charset=utf-8
Date:Wed, 24 Oct 2012 18:41:05 GMT
Server:Apache-Coyote/1.1

需要= FALSE

Request URL:http://localhost:8080/internal-project/rest/bogus
Request Method:POST
Status Code:200 OK
Request Headersview source
Accept:application/json
Connection:keep-alive
Content-Length:12
Host:localhost:8080
Request Payload
test=LALALAA
Response Headersview source
Content-Type:application/json;charset=UTF-8
Date:Wed, 24 Oct 2012 18:44:03 GMT
Server:Apache-Coyote/1.1
Transfer-Encoding:chunked

它是切换时运行的完全相同的测试套件required,我可以看到参数正在传递.当参数是可选的时,Spring会正确处理它.

如果有人之前碰过这个或有任何想法,我很乐意听到他们.将所需参数标记为可选参数即使可行,也是可怕的自我文档,即使我发表评论.此外,这种行为让我有点紧张.希望我只是搞砸了某个地方......

Answer 1

我认为你的Content-Type标题应该是application/x-www-form-urlencoded.