content: package com.alibaba.json.bvt.serializer;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import com.alibaba.fastjson.parser.Feature;
  import junit.framework.TestCase;
  
  import org.junit.Assert;
  
  import com.alibaba.fastjson.JSON;
  import com.alibaba.fastjson.serializer.SerializerFeature;
  
  @SuppressWarnings({ "rawtypes", "unchecked" })
  public class NoneStringKeyTest extends TestCase {
  
      public void test_0() throws Exception {
          Map map = new HashMap();
          map.put(1, 101);
  
          Assert.assertEquals("{1:101}", JSON.toJSONString(map));
      }
  
      public void test_1() throws Exception {
          Map map = new HashMap();
          map.put(1, 101);
  
          Assert.assertEquals("{\"1\":101}", JSON.toJSONString(map, SerializerFeature.BrowserCompatible));
      }
  
      public void test_2() throws Exception {
          Map map = new HashMap();
          map.put(1, 101);
  
          Assert.assertEquals("{\"1\":101}", JSON.toJSONString(map, SerializerFeature.WriteNonStringKeyAsString));
      }
  
      public void test_null_0() throws Exception {
          Map map = new HashMap();
          map.put(null, 101);
  
          Assert.assertEquals("{null:101}", JSON.toJSONString(map));
      }
  
      public void test_3() throws Exception {
          Map map = new HashMap();
          map.put(null, 101);
  
          Assert.assertEquals("{\"null\":101}", JSON.toJSONString(map, SerializerFeature.WriteNonStringKeyAsString));
      }
  
      public void test_4() throws Exception {
          SubjectDTO dto = new SubjectDTO();
          dto.getResults().put(3, new Result());
  
          String json = JSON.toJSONString(dto);
          assertEquals("{\"results\":{3:{}}}", json);
  
          SubjectDTO dto2 = JSON.parseObject(json, SubjectDTO.class, Feature.NonStringKeyAsString);
          System.out.println(JSON.toJSONString(dto2.getResults()));
      }
  
      public static class Result {
  
      }
  
      public static class SubjectDTO {
          private Map<Integer, Result> results = new HashMap<Integer, Result>();
  
          public Map<Integer, Result> getResults() {
              return results;
          }
      }
  }
  