Question

当我执行以下代码时，出现类似

的错误

"org.springframework.web.client.HttpClientErrorException: 400 null"。但是当我用邮递员称呼这个“ http://localhost:2018/test”时，它就起作用了。

    static final String URL_EMPLOYEES = "http://localhost:2018/test";   
            HttpHeaders headers = new HttpHeaders();
        headers.setAccept(Arrays.asList(new MediaType[] {  
             MediaType.APPLICATION_JSON}));
        // Request to return XML format
        headers.setContentType(MediaType.APPLICATION_JSON);
        headers.set("replyMsg", "str");

        // HttpEntity<Employee[]>: To get result as Employee[].
        HttpEntity<String> entity = new HttpEntity<String>(headers);
        // RestTemplate
        RestTemplate restTemplate = new RestTemplate();
        // Send request with GET method, and Headers.

        ResponseEntity<String> response = 
       restTemplate.exchange(URL_EMPLOYEES,
                HttpMethod.POST, entity,String.class);

        HttpStatus statusCode = response.getStatusCode();
        // Status Code: 200
        if (statusCode == HttpStatus.OK) {
            // Response Body Data
            msg=response.getBody();
            if (msg != null) {
              System.out.println(msg);
            }
        }


//my clint controller class
    @RestController
    public class TextController {
   @RequestMapping(value="/test",method = RequestMethod.POST)
   public String myData2(@RequestBody String payload) {
   return "done";

 }  

   }

有任何建议吗？

Answer 1

如果您使用Jackson作为JSON解析器，则只需声明类型为TextNode的参数即可。这是表示JSON字符串的Jackson类型。

public String updateName(@PathVariable(MY_ID) String myId, @RequestBody TextNode name) {

然后可以使用其asText方法检索其文本值。

Answer 2

在这里，您设置类型为{{1}的标头Content-Type并传递类型为JSON的正文。

text/String

因此，首先您需要将其更改为

headers.setContentType(MediaType.APPLICATION_JSON); //setting your Content type as JSON.

并在此行之后添加一些代码

headers.setContentType(MediaType.TEXT_PLAIN); //setting your Content type as Pure Text String.

添加此代码

// HttpEntity<Employee[]>: To get result as Employee[].
        HttpEntity<String> entity = new HttpEntity<String>(headers);

这可能对您有用。。谢谢：）

Spring Boot Rest客户端连接异常:: org.springframework.web.client.HttpClientErrorException：400 null

2 个答案: