Java Spring RestTemplate 发送列表和获取列表
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Spring RestTemplate Send List an get List
提问by Mohammad Mirzaeyan
I want to make a service with Spring's RestTemplate, in my service side the code is like this :
我想用 Spring 做一个服务RestTemplate，在我的服务端代码是这样的：
@PostMapping(path="/savePersonList")
@ResponseBody
public List<Person> generatePersonList(@RequestBody List<Person> person){
return iPersonRestService.generatePersonList(person);
}
In client side if I call the service with this code:
在客户端，如果我使用以下代码调用服务：
List<Person> p = (List<Person>) restTemplate.postForObject(url, PersonList, List.class);
I can't use the pobject as List<Person>, it will become a LinkedHashList.
After some research I find a solution that said I have to call the service with exchange method:
我不能将p对象用作List<Person>，它将成为LinkedHashList. 经过一番研究，我找到了一个解决方案，说我必须使用交换方法调用服务：
ResponseEntity<List<Person>> rateResponse = restTemplate.exchange(url, HttpMethod.POST, personListResult, new ParameterizedTypeReference<List<Person>>() {});
and with this solution the server can't take the object and raise an exception , what's the correct way?
使用此解决方案，服务器无法接受对象并引发异常，正确的方法是什么？
回答by abaghel
Check if your code is like below. This should work.
检查您的代码是否如下所示。这应该有效。
//header
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
//person list
List<Person> personList = new ArrayList<Person>();
Person person = new Person();
person.setName("UserOne");
personList.add(person);
//httpEnitity
HttpEntity<Object> requestEntity = new HttpEntity<Object>(personList,headers);
ResponseEntity<List<Person>> rateResponse = restTemplate.exchange(url, HttpMethod.POST, requestEntity,new ParameterizedTypeReference<List<Person>>() {});
回答by Sourav Ghadai
It may be helpful for you.
它可能对你有帮助。
List<Integer> officialIds = null;
//add values to officialIds
RestTemplate restTemplate = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
HttpEntity<List<Integer>> request = new HttpEntity<List<Integer>>(officialIds,
headers);
ResponseEntity<YourResponseClass[]> responses =
restTemplate.postForEntity("your URL", request , YourResponseClass[].class );
List<YourResponseClass> list = Arrays.asList(responses.getBody());
