Java – spring resttemplate send list get list

I want to use spring's resttemplate to provide services. In terms of my services, the code is as follows:

@PostMapping(path="/savePersonList")
@ResponseBody
public List<Person> generatePersonList(@RequestBody List<Person> person){
    return iPersonRestService.generatePersonList(person);
}

On the client side, if I use this code to invoke a service:

List<Person> p = (List<Person>) restTemplate.postForObject(url,PersonList,List.class);

I can't use the P object as list < person >, it will become linkedhashlist After some research, I found a solution that I must call the service with the exchange method:

ResponseEntity<List<Person>> rateResponse = restTemplate.exchange(url,HttpMethod.POST,personListResult,new ParameterizedTypeReference<List<Person>>() {});

And with this solution, the server cannot get the object and throw an exception. Is this the correct method?

Solution

Check that your code is as follows This should work

//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,requestEntity,new ParameterizedTypeReference<List<Person>>() {});