content: package com.alibaba.fastjson2.issues;
  
  import com.alibaba.fastjson2.JSON;
  import com.alibaba.fastjson2.JSONWriter;
  import com.alibaba.fastjson2.TypeReference;
  import org.json.JSONException;
  import org.junit.jupiter.api.Test;
  import org.skyscreamer.jsonassert.JSONAssert;
  
  import java.util.HashMap;
  import java.util.LinkedHashMap;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class Issue507 {
      @Test
      public void test() throws JSONException {
          Map<Long, String> map = new HashMap<>();
          map.put(1L, "张三");
          map.put(2L, "张四");
  
          String str = JSON.toJSONString(map, JSONWriter.Feature.WriteClassName);
          JSONAssert.assertEquals("{\"@type\":\"java.util.HashMap\",1L:\"张三\",2L:\"张四\"}", str, true);
  
          Map map2 = (Map) JSON.parseObject(str, HashMap.class);
          assertTrue(map2.containsKey(1L));
          assertEquals("张三", map2.get(1L));
          assertEquals("张四", map2.get(2L));
      }
  
      @Test
      public void test1() throws JSONException {
          Map<Long, String> map = new HashMap<>();
          map.put(1L, "张三");
          map.put(2L, "张四");
  
          String str = JSON.toJSONString(map, JSONWriter.Feature.WriteClassName);
          JSONAssert.assertEquals("{\"@type\":\"java.util.HashMap\",1L:\"张三\",2L:\"张四\"}", str, true);
  
          Map map2 = (Map) JSON.parseObject(str, Object.class);
          assertEquals("张三", map2.get(1L));
          assertEquals("张四", map2.get(2L));
      }
  
      @Test
      public void test2() {
          String str = "{1L:\"张三\",2L:\"张四\"}";
  
          Map object = (Map) JSON.parseObject(str, Object.class);
          assertEquals("张三", object.get(1L));
          assertEquals("张四", object.get(2L));
          assertEquals(2, object.size());
  
          Map map = JSON.parseObject(str, Map.class);
          assertEquals("张三", map.get(1L));
          assertEquals("张四", map.get(2L));
          assertEquals(2, map.size());
  
          Map map1 = JSON.parseObject(str, LinkedHashMap.class);
          assertEquals("张三", map1.get(1L));
          assertEquals("张四", map1.get(2L));
          assertEquals(2, map1.size());
  
          Map map2 = JSON.parseObject(str, HashMap.class);
          assertEquals("张三", map2.get(1L));
          assertEquals("张四", map2.get(2L));
          assertEquals(2, map2.size());
      }
  
      @Test
      public void test3() {
          String str = "{1L:\"张三\",2L:\"张四\"}";
  
          Map map = JSON.parseObject(str, new TypeReference<Map<Number, String>>(){});
          assertEquals("张三", map.get(1L));
          assertEquals("张四", map.get(2L));
          assertEquals(2, map.size());
  
          Map map1 = JSON.parseObject(str, new TypeReference<Map<Number, Object>>(){});
          assertEquals("张三", map1.get(1L));
          assertEquals("张四", map1.get(2L));
          assertEquals(2, map1.size());
  
          Map map2 = JSON.parseObject(str, new TypeReference<Map<Integer, Object>>(){});
          assertEquals("张三", map2.get(1));
          assertEquals("张四", map2.get(2));
          assertEquals(2, map2.size());
      }
  }
  