Restful Spring postForObject 缺少所有 属性 值

Question

我尝试模拟restful服务器：

private void btnPostActionPerformed(java.awt.event.ActionEvent evt) {                                        
        RestTemplate restTemplate = new RestTemplate();

        Issuer issuer = new Issuer();
        issuer.setCountry("Teacher 1");
        issuer.setIssuerName("Department 1");
        String url = txtHost.getText()+txtGet.getText();
        restTemplate.postForObject(url, issuer, Issuer.class) ;
    }          

控制器代码：

 @RequestMapping(value = "/issuer/addIssuer", method = RequestMethod.POST)
    @ResponseBody
    public Issuer addIssuer(@ModelAttribute("issuer") Issuer issuer) {

        if (issuer != null) {
            logger.info("Inside addIssuer, adding: " + issuer.toString());
        } else {
            logger.info("Inside addIssuer...");
        }
        issuers.put(issuer.getTicker(), issuer);
        return issuer;

    }

我已经填充了一些属性，但是当我调试服务器时，所有值都是空的。

信息：com.avaldes.tutorial.RestController - 在 addIssuer 内部，添加：[null, null, null, null]

IssuerName 和 country 也为 null.. 我的代码有什么问题？

Answer 1

您正在控制器中使用 @ModelAttribute。在这种情况下，您需要将数据发送为 application/x-www-form-urlencoded:

MultiValueMap<String, Object> variables = new LinkedMultiValueMap<>();
variables.add("country", "Teacher 1");
variables.add("issuerName", "Department 1");

RestTemplate restTemplate = new RestTemplate();

HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(variables, requestHeaders);

String url = txtHost.getText()+txtGet.getText();
ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.POST, requestEntity, Issuer.class);