Question

我必须编写一个程序，该程序将接受Hashmap格式的主体。我用Hashmap值和标头创建了HttpEntity。

public <T> void doPOSTRequest(String url, T body, HttpHeaders headers) throws JsonProcessingException {

    HttpEntity<T> request = new HttpEntity<T>(body,headers);
    System.out.println("Printing Request :" + request);
    ResponseEntity<String> response = null;

    //Calling POST Method
    //response=restTemplate.postForObject(url,request,String.class);
     response=restTemplate.exchange(url, HttpMethod.POST,request,String.class);


    System.out.println(response);

}

我正面临以下异常：

线程“主”中的异常 org.springframework.web.client.RestClientException：否用于[java.util.HashMap]的HttpMessageConverter，位于 org.springframework.web.client.RestTemplate $ HttpEntityRequestCallback.doWithRequest（RestTemplate.java:957）在 org.springframework.web.client.RestTemplate.doExecute（RestTemplate.java:733）在 org.springframework.web.client.RestTemplate.execute（RestTemplate.java:670）在 org.springframework.web.client.RestTemplate.exchange（RestTemplate.java:579）在Com.RESTRequest.doPOSTRequest（RESTRequest.java:39）在 Com.GenericREST.main（GenericREST.java:30）

Answer 1

尝试使用MultiValueMap代替通用

HttpEntity<MultiValueMap<String, Object>> entity = new HttpEntity<MultiValueMap<String, Object>>(parameters, headers);

完整块：

public <T> void doPOSTRequest(String url, T body, HttpHeaders headers) throws JsonProcessingException {
    HttpEntity<MultiValueMap<String, Object>> request = new HttpEntity<MultiValueMap<String, Object>>(body,headers);
    System.out.println("Printing Request :" + request);
    ResponseEntity<String> response = null;
    //Calling POST Method
    //response=restTemplate.postForObject(url,request,String.class);
     response=restTemplate.exchange(url, HttpMethod.POST,request,String.class);

    System.out.println(response);
}

接受Hashmap作为POST调用的正文

1 个答案: