发送 JSON 没有标识符的请求体 SPRING 引导

Question

I am consuming a legacy rest service that receives xml text in the body but is sent as json as shown in the following image

Postman source request

I have done the process to transform the previous request to a request that receives a JSON in normal format New JSON request

And then I transform it into the format that asks me for the source request, my problem is that I do not know how to send my string request because I get the following error when I try to send it Request error new http request

I get the same error when I sent in my source request in plain text format Plain text error legacy http request

however in code I already transformed this text into JSON format but probably incorrectly,in the following sample code the http entity is the xml string object required by the legacy service

@Value("${client.medExpInsuranceQuotation.uri}")
private String clientUri;

@Autowired
@Qualifier("restTemplategetPolicyWs")
private RestTemplate restTemplate;

@Override
public Object callMedicalExpenseInsuranceQuotation(MedicalExpenseInsuranceQuotationRequestClient requestClient) {
    
    Gson gson = new Gson();
    Object json = gson.toJson(requestClient.getXml(), String.class);
    System.out.println("Object: "+json); 
    
    HttpEntity<Object> entity = new HttpEntity<>(json);
    log.info(requestClient.getXml());
    ResponseEntity<ResponseBean<Object>> responseEntity = restTemplate.exchange(clientUri, HttpMethod.POST, entity, new ParameterizedTypeReference<ResponseBean<Object>>() {
    });
    
    return responseEntity.getBody().getPayload();
}

Notes: The legacy service only receives the body in the format indicated in image 1 (Postman source request)

if I try to send the body in traditional json format with an attribute identifier attemp send normal json format

I get the following error without information

{
    "Message": "An error has occurred."
}

I hope you can help me greetings

Answer 1

That rest service is consuming json format. Note the double quotes at the start and the end of the payload - this makes it json string . Not json object , or json array , but json string . You need to transform the xml payload into json string and send the correct content type header - application/json .

Edit: To get json string first you need the xml as a string(it's already a string, i know that sounds strange, but can't explain it better). Then you call toJson() on that xml. Something similar to this:

String xml = "<xml><tag></tag></xml>";
String jsonString = gson.toJson(xml);
System.out.println(jsonString);