Spring-cloud-netflix: java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to com.chen.sopan.entity.SopanItem

[hcxin]

I hit exception when using restTemplate.postForObject().
client code like below：

List < com.chen.sopan.entity.SopanItem> result = restTemplate.postForObject("http://sopanService/getResultList", param, List.class);

service code:
@RequestMapping(value = "/getResultList")
public List getResultList(HttpServletRequest request, @RequestBody SoPanInfoParam param) {

    List< com.chen.sopan.entity.SopanItem> resultList =....
    return resultList ;
}

[spencergibb]

Can you please provide more information? Whatever is marshalling your objects is putting it into a LinkedHashMap. Maybe it's missing some configuration?

[hcxin]

I have resolved it by using ParameterizedTypeReference.
https://stackoverflow.com/questions/19463372/classcastexception-resttemplate-returning-listlinkedhashmap-instead-of-listm

[PAX523]

For all further dudes who struggle with this and are searching the entire web for any solution, consider that you also could transform the response type of your REST API into an array type (instead of List):

  @GetMapping(value = "...")
  public ResponseEntity<MyModel[]> getSomething(...) { ...

And on the client side you invoke it like this:

      final ResponseEntity<MyModel[]> response = restTemplate
              .getForEntity(uri, MyModel[].class);

      return Arrays.asList(response.getBody());