content: package com.alibaba.fastjson2.issues;
  
  import com.alibaba.fastjson2.JSON;
  import com.alibaba.fastjson2.JSONWriter;
  import org.junit.jupiter.api.Test;
  
  import java.util.Date;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class Issue516 {
      @Test
      public void test() {
          Date date = new Date(1656479550452L);
          String str = JSON.toJSONString(date, "yyyy-MM-dd HH:mm:ss.SSS");
          assertEquals("\"2022-06-29 13:12:30.452\"", str);
      }
  
      @Test
      public void testUTF8() {
          Date date = new Date(1656479550452L);
          JSONWriter jsonWriter = JSONWriter.ofUTF8();
          jsonWriter.getContext().setDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
          jsonWriter.writeAny(date);
          String str = jsonWriter.toString();
          assertEquals("\"2022-06-29 13:12:30.452\"", str);
      }
  
      @Test
      public void testUTF16() {
          Date date = new Date(1656479550452L);
          JSONWriter jsonWriter = JSONWriter.ofUTF16();
          jsonWriter.getContext().setDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
          jsonWriter.writeAny(date);
          String str = jsonWriter.toString();
          assertEquals("\"2022-06-29 13:12:30.452\"", str);
      }
  }
  