使用REST客户端从JSON获取值

  • Z时代
  • 2024-01-10
  • 分类：问答

我的api工作正常，并且在POSTMAN中测试时确实返回了JSON结果。我有问题通过使用REST客户端的控制器检索JSON值。我正在使用spring和hibernate。使用REST客户端从JSON获取值

@RequestMapping(value = "/viewForm/{id}") 
    public String viewForm(@Valid @PathVariable("id") String id, Model model) { 
     RestTemplate restTemplate = new RestTemplate(); 
     String fooResourceUrl 
      = "http://localhost:8080/api/delivery/searchDanceform/"+ id; 
     System.out.println(fooResourceUrl); 
     ResponseEntity<DanceApplicationForm> rateResponse = 
       restTemplate.exchange(fooResourceUrl, 
          HttpMethod.GET, null, DanceApplicationForm.class); 
     DanceApplicationForm response = rateResponse.getBody(); 
     System.out.println(response); 
     logger.info("result = {}", response); 
     return VIEW_PATH + "dance-profile"; 
    }

我得到这个错误，

SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/intranet-web] threw exception [Request processing failed; nested exception is org.springframework.web.client.HttpClientErrorException: 404 null] with root cause 
org.springframework.web.client.HttpClientErrorException: 404 null 
    at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:78) 
    at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:700) 
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:653) 
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:613) 
    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:531) 
    at sg.com.ctc.intranet.web.training.controller.DanceController.viewDanceApplicationForm(DanceController.java:239) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

我自己也尝试这种方式。

String response = restTemplate.getForObject(fooResourceUrl, String.class);

但仍然无法正常工作。

回答：

你正在通过null值交换的方法，实际上代替null你必须通过实体引用。

HttpHeaders headers = new HttpHeaders(); 
headers.set("Accept", "application/json"); 
HttpEntity entity = new HttpEntity(headers); 
ResponseEntity<DanceApplicationForm> rateResponse = restTemplate.exchange(url, HttpMethod.GET, entity, DanceApplicationForm.class);

回答：

我把它放在答案部分，因为我不太确定我可以在哪里回复我的代码。

@RequestMapping(value = "/viewDanceApplication/{id}") 
    public String viewDanceApplicationForm(@Valid @PathVariable("id") String id, Model model) { 
     RestTemplate restTemplate = new RestTemplate(); 
     String fooResourceUrl 
      = "http://localhost:8080/api/delivery/searchDanceform/"+ id; 
     HttpHeaders headers = new HttpHeaders(); 
     headers.set("Accept", "application/json"); 
     HttpEntity entity = new HttpEntity(headers); 
     ResponseEntity<DanceApplicationForm> rateResponse = restTemplate.exchange(fooResourceUrl, HttpMethod.GET, entity, DanceApplicationForm.class); 
    logger.info("result = {}", rateResponse); 
    model.addAttribute("showProfile",rateResponse); 
return VIEW_PATH + "dance-profile"; 
    }

回答：

这是

处理程序控制器 

http://localhost:8080/api/delivery/searchDanceform/ 
@RequestMapping(value = "/searchDanceform/{id}") 
    public String searchDanceform(@Valid @PathVariable("id") String id, Model model) { 
      // do your code and return response 
    }

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