Spring RESTtemplate POST

Question

我正在使用Spring框架並試圖發佈帖子請求。我的post方法使用url，HttpMethod和進入請求主體的參數。

注意：在network.POSTRequest（URL，..，...）中傳遞的var URL對於每個調用都是不同的。現在

，如果我把這種方法，象這樣一個參數......（它精美的作品！）

//with one parameter 
MultiValueMap<String, String> postParams = new LinkedMultiValueMap<String, String>(); 
postParams.add("id", "524cd432539ed"); 
network.POSTRequest(URL, HttpMethod.POST, postParams); 

，但如果有像這樣兩個參數....（它拋出這個錯誤）

org.springframework.web.client.HttpServerErrorException：500內部服務器錯誤

//with two parameters 
MultiValueMap<String, String> postParams = new LinkedMultiValueMap<String, String>(); 
postParams.add("id", "crisp"); 
postParams.add("name", "honey"); 
network.POSTRequest(URL, HttpMethod.POST, postParams); 

這是POSTRequest方法

public Object POSTRequest(String URL, HttpMethod method, MultiValueMap<String, String> postParams){ 
      HttpEntity<?> requestEntity = 
       new HttpEntity< MultiValueMap<String, String> >(postParams, getHeaders()); 
     RestTemplate restTemplate = new RestTemplate(); 
     List< HttpMessageConverter<?> > messageConverters = new ArrayList< HttpMessageConverter<?> >(); 

     messageConverters.add(new MappingJacksonHttpMessageConverter()); 
     restTemplate.getMessageConverters().add(new StringHttpMessageConverter()); 
     restTemplate.setMessageConverters(messageConverters); 

     System.out.println(requestEntity.toString()); 
     ResponseEntity result = 
       restTemplate.exchange(URL, method, requestEntity, APIResponse.class) ; 
     return result.getBody(); 
    } 

Answer 1

這不是設置消息轉換的一個好辦法：

List< HttpMessageConverter<?> > messageConverters = new ArrayList< HttpMessageConverter<?> >(); 
// empty list created 

messageConverters.add(new MappingJacksonHttpMessageConverter()); 
// list has 1 elem now 

restTemplate.getMessageConverters().add(new StringHttpMessageConverter()); 
// adds StringHttpMessageConverter to restTemplate converter list 

restTemplate.setMessageConverters(messageConverters); 
// replaces restTemplate converter list with your custom list containing MappingJacksonHttpMessageConverter only 
// original list containing StringHttpMessageConverter is LOST 

你還是用一貫的方法來這樣：

List< HttpMessageConverter<?> > messageConverters = new ArrayList< HttpMessageConverter<?> >(); 
// empty list created 

messageConverters.add(new MappingJacksonHttpMessageConverter());  
messageConverters.add(new StringHttpMessageConverter()); 

restTemplate.setMessageConverters(messageConverters);