在springboot微服务架构中，带有JSON主体的POST请求不传递到endpoint

Question

public class Registration{

public static void postRegistration(){

final String registrationUrl = "localhost:9000/registry";
RestTemplate restTemplate = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
JSONObject registrationDetails = new JSONObject();

headers.setContentType(MediaType.APPLICATION_JSON);
registrationDetails.put("name", "OrderGenerator");
registrationDetails.put("uri", "http://localhost:8081/generate");
HttpEntity<String> request = 
new HttpEntity<String>(registrationDetails.toString(), headers);

String response = restTemplate.postForObject(registrationUrl,request,String.class);
System.out.println(response);
 }

};

@SpringBootApplication
public class OrderGeneratorServiceApplication {

public static void main(String[] args) {
    
    SpringApplication.run(OrderGeneratorServiceApplication.class, args);
    Registration.postRegistration();
}

Answer 1

如果您使用的是Postman，它会为您提出的请求创建自动生成的代码。它在右手边的“保存”按钮的正下方。您需要创建自己的自动格式化方法，以便提供正确的输入。下面是我目前正在使用的一些API的一个示例。

你看到我在第三行有一个超长的输入了吗？您应该创建一个方法，该方法将接受您的输入并自动格式化它。

                OkHttpClient client = new OkHttpClient().newBuilder()
                        .build();
                MediaType mediaType = MediaType.parse("application/json");
                RequestBody body = RequestBody.create(mediaType, "{\r\n  \"categoryName\": \"PostMan\",\r\n  \"categoryQuestions\": [\r\n    \"When is the last time you experienced nostalgia?\",\r\n    \"What's the scariest dream you've ever had?\",\r\n    \"What's the weirdest thought you've ever had?\",\r\n    \"What's the first thing that comes to mind when you hear the word fidget?\",\r\n    \"What made-up word would you incorporate into the English language if you could?\"\r\n  ]\r\n}");
                Request request = new Request.Builder()
                        .url("http://localhost:8080/api/v1/categories")
                        .method("POST", body)
                        .addHeader("Content-Type", "application/json")
                        .build();
                Response response = client.newCall(request).execute();
                System.out.println(response.body().string());

下面是我的示例（我使用的是如下格式的JSON数据

{
  "categoryName": "PostMan",
  "categoryQuestions": [
    "When is the last time you experienced nostalgia?",
    "What's the scariest dream you've ever had?",
    "What's the weirdest thought you've ever had?",
    "What's the first thing that comes to mind when you hear the word fidget?",
    "What made-up word would you incorporate into the English language if you could?"
  ]
}

public static String inputParse(String nameInput, ArrayList<String> questionInput) {
        String inputBuilder = "{\r\n  \"categoryName\": \"" + nameInput + "\",\r\n  \"categoryQuestions\": [\r\n    ";
        for (int i = 0; i < questionInput.size(); i++)
        {
            inputBuilder += "\"" + questionInput.get(i) + "\"";
            if (i != questionInput.size()-1)
            {
                inputBuilder += ",";
            }
        }
        inputBuilder += "\r\n  ]\r\n}";
        return inputBuilder;
    }

private void createEmployee() {

        Employee newEmployee = new Employee("admin", "admin", "[e-mail]");

        RestTemplate restTemplate = new RestTemplate();
        Employee result = restTemplate.postForObject(CREATE_EMPLOYEE_ENDPOINT_URL, newEmployee, Employee.class);

        System.out.println(result);
    }