content: package com.alibaba.fastjson2.issues_1000;
  
  import com.alibaba.fastjson2.JSON;
  import org.junit.jupiter.api.Test;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class Issue1351 {
      @Test
      public void test() {
          Bean bean = new Bean();
          Inner inner = new Inner();
          ArrayList<Inner> innerList = new ArrayList<>();
          innerList.add(inner);
          HashMap<String, List<Inner>> map = new HashMap<>();
          map.put("innerList", innerList);
          List<Map<String, List<Inner>>> list = new ArrayList<>();
          list.add(map);
          bean.setList(list);
          String toJson = JSON.toJSONString(bean);
          assertEquals("{\"list\":[{\"innerList\":[{\"f1\":0}]}]}", toJson);
          Bean fromJson = JSON.parseObject(toJson, Bean.class);
          assertEquals(1, fromJson.getList().size());
      }
  
      public static class Bean {
          List<Map<String, List<Inner>>> list;
  
          public List<Map<String, List<Inner>>> getList() {
              return list;
          }
  
          public void setList(List<Map<String, List<Inner>>> list) {
              this.list = list;
          }
      }
  
      static class Inner {
          private int f1;
  
          public int getF1() {
              return f1;
          }
  
          public void setF1(int f1) {
              this.f1 = f1;
          }
      }
  }
  