Question

我需要使用restTemplate发送一个jsonArray，但是我不知道正确的方法。这是我的代码。有人可以告诉我问题出在哪里吗？

requestHandler：

@CrossOrigin
    @RequestMapping(path = "/duplication", method = RequestMethod.GET)
    public ResponseEntity<Boolean> checkDeviceDuplication(
            @RequestHeader("token") String token,
            @RequestBody Set<DeviceCheckDuplicationMessage> devicesToCheck
            )
    {
        System.out.println("size:" + devicesToCheck.size());
    }

restTemplate客户端：

String authorityValidUrl = "http://192.168.227.100:15004/duplication";
                RestTemplate restTemplate = restTemplateBuilder.build();
                HttpHeaders requestHeaders = new HttpHeaders();
                requestHeaders.set("token", "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJkaXNwbGF5TmFtZSI6IuWuieaWh-mRqyIsInJvbGVzIjpbIlJPTEVfQ0hFQ0tBTkRGSVhNQU5BR0VSIiwiUk9MRV9QTEFORU1BTkFHRVIiLCJST0xFX1BST0pFQ1RNQU5BR0VSIiwiUk9MRV9URUNIU1RBVFVTTUFOQUdFUiIsIlJPTEVfQ0FUQUxPR1VFTUFOQUdFUiIsIlJPTEVfVFJJUE1BTkFHRVIiLCJST0xFX1VTRVIiXSwiZXhwIjoxNTQ1Mzk2MDc0LCJ1c2VybmFtZSI6ImFud3gifQ.tM2t7yLcg9fHr78KtCf0ocscy6nOAZioJ0V_zGERKaM");
                requestHeaders.setContentType(MediaType.APPLICATION_JSON);

                Set<DeviceCheckDuplicationMessage> devicesToCheck = new HashSet<>();
                devicesToCheck.add(new DeviceCheckDuplicationMessage("cn", "en", "model", "sn"));
                devicesToCheck.add(new DeviceCheckDuplicationMessage("name_cn1", "name_en1", "model1", "sn1"));

                String body = JSON.toJSONString(devicesToCheck);

                HttpEntity<String> requestEntity = new HttpEntity<>(body, requestHeaders);
                requestEntity.getBody();
                ResponseEntity<Boolean> validResult = restTemplate.exchange(
                        new URI(authorityValidUrl), 
                        HttpMethod.GET, 
                        requestEntity, 
                        Boolean.class
                    );

现在requestHandler告诉我缺少的requestBody。

但是我使用邮差请求具有相同的标头，并且jsonData可以。

Answer 1

我尝试更改http方法以将对象发布并请求到对象。而且有效。

根据文档https://docs.spring.io/spring/docs/5.1.3.RELEASE/spring-framework-reference/integration.html#spring-integration

您无需显式设置请求的Content-Type标头。在大多数情况下，您可以找到基于源对象类型的兼容消息转换器，并且所选消息转换器会相应地设置内容类型。如有必要，可以使用交换方法显式提供Content-Type请求标头，从而影响选择哪种消息转换器。

和

在HttpMessageConverter的帮助下，传递到RestTemplate方法和从RestTemplate方法返回的对象与原始内容进行转换。

在POST上，输入对象被序列化到请求正文

在GET上，响应主体反序列化为输出对象

所以我将代码更改为此并且可以正常工作。

@Test
    public void testValid() {
        try {
                String authorityValidUrl = "http://192.168.227.100:15004/duplication";
                HttpHeaders requestHeaders = new HttpHeaders();
                requestHeaders.set("token", "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJkaXNwbGF5TmFtZSI6IuWuieaWh-mRqyIsInJvbGVzIjpbIlJPTEVfQ0hFQ0tBTkRGSVhNQU5BR0VSIiwiUk9MRV9QTEFORU1BTkFHRVIiLCJST0xFX1BST0pFQ1RNQU5BR0VSIiwiUk9MRV9URUNIU1RBVFVTTUFOQUdFUiIsIlJPTEVfQ0FUQUxPR1VFTUFOQUdFUiIsIlJPTEVfVFJJUE1BTkFHRVIiLCJST0xFX1VTRVIiXSwiZXhwIjoxNTQ1NzE2NzQ1LCJ1c2VybmFtZSI6ImFud3gifQ.two6KeWnV2egnEk4QC3PuIPJfiRSSReNtKfzbE9qSQQ");
                //requestHeaders.setContentType(MediaType.APPLICATION_JSON);

                Set<DeviceCheckDuplicationMessage> devicesToCheck = new HashSet<>();
                devicesToCheck.add(new DeviceCheckDuplicationMessage("cn", "en", "model", "sn"));
                devicesToCheck.add(new DeviceCheckDuplicationMessage("name_cn1", "name_en1", "model1", "sn1"));

                HttpEntity<Set<DeviceCheckDuplicationMessage>> requestEntity = new HttpEntity<>(devicesToCheck, requestHeaders);
                ResponseEntity<Boolean> validResult = restTemplate.exchange(
                        new URI(authorityValidUrl), 
                        HttpMethod.POST, //HttpMethod.GET,
                        requestEntity, 
                        Boolean.class
                    );
                boolean result = Boolean.valueOf(validResult.getBody());
                System.out.println(result);
                System.out.println(validResult.getStatusCodeValue());
        }catch(Exception e) {
            e.printStackTrace();
        }
    }

如何使用restTemplate发送jsonArray？

1 个答案: