如何处理返回多种类型响应的spring rest服务调用

Question

Class responseDto {
 private Arraylist < Response > response;
 getResponse();
 setResponse();
}

Response {
  String code;
  String trid;
  Getters();
  Setters();
}

{
"response":[
   {
     "code":"100",
     "trid":"123"
   }
 ]
}

{
 "response":{
  "code":"700",
  "trid":"123"
 }
}

Answer 1

解决方案1：使用@JSONFormat(>2.6版本）

只需用@jsonformat将您的字段注释为

import java.util.List;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.annotation.JsonFormat.Feature;

public class ResponseDto {

    @JsonFormat(with = Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY)
    private List<Response> response;

    public List<Response> getResponse() {
        return response;
    }

    public void setResponse(List<Response> response) {
        this.response = response;
    }
}

解决方案2：设置DeserializationFeature

public static void main(String[] args) throws IOException {

    ObjectMapper mapper = new ObjectMapper();

    // global setting, can be overridden using @JsonFormat in beans
    // when using @JsonFormat on fields, then this is not needed 
    mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);

    ResponseDto dto =  mapper.readValue(stringResponse, ResponseDto.class);
}