content: package com.alibaba.fastjson2.v1issues.issue_1400;
  
  import com.alibaba.fastjson2.JSON;
  import com.alibaba.fastjson2.annotation.JSONField;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class Issue1487 {
      @Test
      public void test_for_issue() throws Exception {
          Model model = new Model();
          model._id = 1001L;
          model.id = 1002L;
  
          String json = JSON.toJSONString(model);
          assertEquals("{\"_id\":1001,\"id\":1002}", json);
          Model model1 = JSON.parseObject(json, Model.class);
          assertEquals(json, JSON.toJSONString(model1));
      }
  
      public static class Model {
          private Long _id;
          private Long id;
  
          @JSONField(name = "_id")
          public long get_id() {
              if (null != _id) {
                  return _id.longValue();
              } else {
                  return 0L;
              }
          }
  
          @JSONField(name = "_id")
          public void set_id(Long _id) {
              this._id = _id;
          }
  
          public long getId() {
              if (null != id) {
                  return id.longValue();
              } else {
                  return 0L;
              }
          }
  
          public void setId(Long id) {
              this.id = id;
          }
      }
  }
  