content: package com.alibaba.fastjson2.issues;
  
  import com.alibaba.fastjson2.JSON;
  import lombok.AllArgsConstructor;
  import lombok.Data;
  import lombok.NoArgsConstructor;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class Issue924 {
      @Test
      public void test() {
          Entity entity = new Entity(101L);
          String json = JSON.toJSONString(entity);
          assertEquals("{\"C\":101}", json);
  
          Entity entity1 = JSON.parseObject(json, Entity.class);
          assertEquals(entity.C, entity1.C);
  
          Entity entity2 = JSON.parseObject("{\"c\":101}", Entity.class);
          assertEquals(entity.C, entity2.C);
      }
  
      @Test
      public void test1() {
          Entity1 entity = new Entity1(101L);
          String json = JSON.toJSONString(entity);
          assertEquals("{\"C\":101}", json);
  
          Entity1 entity1 = JSON.parseObject(json, Entity1.class);
          assertEquals(entity.C, entity1.C);
  
          Entity1 entity2 = JSON.parseObject("{\"c\":101}", Entity1.class);
          assertEquals(entity.C, entity2.C);
      }
  
      @AllArgsConstructor
      @NoArgsConstructor
      @Data
      public static class Entity {
          private Long C;
      }
  
      @AllArgsConstructor
      @NoArgsConstructor
      @Data
      private static class Entity1 {
          private Long C;
      }
  
      @Test
      public void test2() {
          Entity2 entity = new Entity2();
          entity.ID = 101L;
          String json = JSON.toJSONString(entity);
          assertEquals("{\"ID\":101}", json);
  
          Entity2 entity1 = JSON.parseObject(json, Entity2.class);
          assertEquals(entity.ID, entity1.ID);
  
          Entity2 entity2 = JSON.parseObject("{\"id\":101}", Entity2.class);
          assertEquals(entity.ID, entity2.ID);
      }
  
      public static class Entity2 {
          private Long ID;
  
          public Entity2() {
          }
  
          public Long getID() {
              return ID;
          }
  
          public void setID(Long id) {
              this.ID = id;
          }
      }
  
      @Test
      public void test3() {
          Entity3 entity = new Entity3();
          entity.ID = 101L;
          String json = JSON.toJSONString(entity);
          assertEquals("{\"ID\":101}", json);
  
          Entity3 entity1 = JSON.parseObject(json, Entity3.class);
          assertEquals(entity.ID, entity1.ID);
  
          Entity3 entity2 = JSON.parseObject("{\"id\":101}", Entity3.class);
          assertEquals(entity.ID, entity2.ID);
      }
  
      private static class Entity3 {
          private Long ID;
  
          public Entity3() {
          }
  
          public Long getID() {
              return ID;
          }
  
          public void setID(Long id) {
              this.ID = id;
          }
      }
  }
  