content: package com.alibaba.fastjson2.issues;
  
  import com.alibaba.fastjson2.JSON;
  import com.alibaba.fastjson2.JSONObject;
  import lombok.Getter;
  import lombok.Setter;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  
  public class Issue89 {
      @Test
      public void fetchReward() {
          String str = "{ \n" +
                  "    \"_id\" : \"6195f08f5b210000a7002c14\", \n" +
                  "    \"activityContent\" : {\n" +
                  "        \"awardRule\" : {\n" +
                  "            \"ruleType\" : \"RANDOM\", \n" +
                  "            \"ruleData\" : [\n" +
                  "                {\n" +
                  "                    \"amount\" : \"0.33\", \n" +
                  "                    \"percentage\" : \"0.70\"\n" +
                  "                }, \n" +
                  "                {\n" +
                  "                    \"amount\" : \"0.66\", \n" +
                  "                    \"percentage\" : \"0.15\"\n" +
                  "                }\n" +
                  "            ]\n" +
                  "        }\n" +
                  "    }\n" +
                  "}";
  
          JSONObject object = JSON.parseObject(str);
  
          ActivityDO activityDO = object.toJavaObject(ActivityDO.class);
          JSONObject activityContent = activityDO.getActivityContent();
          // 这里getJSONObject就会报错
          JSONObject awardRule = activityContent.getJSONObject("awardRule");
          assertNotNull(awardRule);
      }
  
      public static class BaseDO {
      }
  
      @Getter
      @Setter
      public static class ActivityDO
              extends BaseDO {
          private JSONObject activityContent;
      }
  }
  