Spring MVC-Ajax调用返回HTTP状态415 –不支持的媒体类型

Question

我想将表单数据提交给控制器，但是即使在HTTP请求中看到正在发送参数，我仍然收到415 HTTP错误。 这是我对控制器的JQuery / AJAX调用：

$.ajax({
            headers: {
                'Accept': 'application/json',
                'Content-Type': 'application/json'
            },
            dataType: "json",
            type: 'POST',
            url: "calculate",
            data : JSON.stringify(data),
            success : function(response){
                alert("OK");
            },
            error : function(){
                alert("Error");
            }
        });

这是我的控制器：

@RequestMapping(value = "calculate", method = RequestMethod.POST, produces = "application/json")
public @ResponseBody void calculate (@RequestBody QueryElements queryElements, HttpServletRequest request) throws IOException {
    System.out.println("OK");
}

现在发生的是，如果我在控制器中删除@RequestBody，则在调试中看到正在调用该控制器，但是显然我需要保留注释。

这是HTTP请求：

Accept:application/json, text/javascript, */*; q=0.01
Accept-Encoding:gzip, deflate, br
Accept-Language:it-IT,it;q=0.8,en-US;q=0.6,en;q=0.4
Connection:keep-alive
Content-Length:593
Content-Type:application/json; charset=UTF-8
Cookie:JSESSIONID=AD8FEA2E46709554189D687A7C65929D
Host:localhost:9082
Origin:http://localhost:9082
Referer:http://localhost:9082/cheexport/export?
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) 
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36
X-Requested-With:XMLHttpRequest
{"bindListregInc":"","bindListregEsc":"","bindListprovInc":"","bindListprovEsc":"","bindListcomInc":"","bindListcomEsc":"","bindListcapInc":"","bindListcapEsc":"","bindListsitInc":"","bindListsitEsc":"","stringaInclusa":"","stringaEsclusa":"","consenso":"","clausola1c":"","sponsor":"","bindListcontrInc":"","bindListcontrEsc":"","bindListcliInc":"","bindListcliEsc":"","nomeContratto":"","customQuote":"","campiHeaderHidden":""}

Answer 1

当您期望使用JSON时，也许您有一个void计算方法。 尝试返回一些东西：

@RequestMapping(value = "calculate", method = RequestMethod.POST, produces = "application/json")
public @ResponseBody ResponseEntity<?> calculate (@RequestBody QueryElements queryElements, HttpServletRequest request) throws IOException {
    return ResponseEntity.ok("OK");
} 

Answer 2

在您的@RequestMapping批注中，您应该添加consumps =“ application / json”，如下所示：@RequestMapping（value =“ someUrl”，消耗= {MediaType.APPLICATION_JSON_VALUE}）

这将告诉Spring方法接受applicatin / json请求。

或者您可以尝试使用@RestController而不是@Controller

另外，尝试将“ contentType”添加到JS代码中。 $ .ajax（{url：“ / api1 / tax”，数据：JSON.stringify（requestData），类型：方法，contentType：“ application / json; charset = utf-8”，成功：函数（数据）{setTimeout（ reloadTable，globalTimeout）;}，错误：函数（错误）{console.log（error）;}}）;