public class Option {
 /**
  * 选项类型
  */
 private Integer oType = 1;

 /**
  * 选项内容
  */
 private String text;
 
 /**
  * 选项图片
  */
 private String img;

 /**
  * 是否正确答案
  */
 private Boolean right;

 /**
  * 用户是否选择
  */
 private Boolean selected;
 ...

public class Question extends MongoBean {
 /**
  * 数据的id
  */
 private String dataId;
 /**
  * 题目类型，1判断题；2单选题；3多选题
  */
 private Integer qType;
 /**
  * 题目标题
  */
 private String title;
 /**
  * 题目选项
  */
 private List<Option> options;
 /**
  * 数据类型
  * @see rmjk.enums.BizTypeEnum
  */
 private Integer dataType;
 /**
  * 数据标题
  */
 private String dataTitle;
 /**
  * 解析
  */
 private String analysis;
 /**
  * 这题是否答对
  */
 private Boolean right;
 /**
  * 这题答的时长
  */
 private Long duration;
 /**
  * 这题的得分
  */
 private Long points;
 ...

@PostMapping("/saveOrUpdateQuestion")
public JsonData saveOrUpdateQuestion(@RequestBody Question data) {
 questionService.saveOrUpdateQuestion(data);
 return JsonData.success();
}

public void saveOrUpdateQuestion(Question data) {
 if (StringUtils.isEmpty(data.getId())) {// 新增
  writer.insert(manager.getExamDataBase(), ExamConstant.QUESTION_COLLECT, data);
 } else {//修改
  writer.updateDocument(data, ExamConstant.QUESTION_COLLECT);
 }
}

public void insert(String dataBase, String collect, MongoBean data) {
 if (data.getId() == null) {
  data.setId(BsonTool.uuid());
 }
 MongoCollection<Document> collection = getCollection(dataBase, collect);
 collection.insertOne(Document.parse(JSONObject.toJSONString(data)));
}

public Document updateDocument(MongoBean data, String questionCollect) {
 Document filter = new Document();
 filter.put("id", data.getId());
 Document res = new Document();
 res.put("$set", BsonDocument.parse(JSONObject.toJSONString(data)));
 update(manager.getExamDataBase(), questionCollect, filter, res);
 return res;
}
public boolean update(String dataBase, String collect, Bson filter, Bson update) {
 MongoCollection<Document> collection = getCollection(dataBase, collect);
 UpdateResult ur = collection.updateOne(filter, update);
 return ur.getModifiedCount() > 0;
}

<Modal title="问题编辑" v-model="showEdit" :closable="false" :mask-closable="false">
 <Form ref="question" :model="question" :rules="ruleValidate">
  <FormItem label="题目类型：" prop="qType">
   <Select v-model="question.qType" class="input-180" placeholder="题目类型" @on-change="changeQType(question)">
    <Option v-for="d in qTypes" :value="d.value" :key="d.value">{{ d.label }}</Option>
   </Select>
  </FormItem>
  <FormItem label="题目：" prop="title">
   <Input
     class="input-95-per"
     v-model="question.title"
     type="textarea"
     row="1"
     placeholder="题目"
     ></Input>
  </FormItem>
  <FormItem label="选项：">
   <div v-for="(o, i2) in question.options" :key="i2" style="display:flex">
    <Input class="input-95-per margin-bot-8 margin-right-10" v-model="o.text">
     <span slot="prepend">{{i2+1}}:</span>
    </Input>
    <Button size="small" @click="addOpt(question)" v-if="i2===0">+</Button>
    <Button size="small" @click="delOpt(question, o)" v-if="i2">-</Button>
    <Checkbox v-model="o.right">正确答案</Checkbox>
   </div>
  </FormItem>
  <FormItem label="答案解析：">
   <Input
     class="input-95-per"
     v-model="question.analysis"
     type="textarea"
     row="1"
     placeholder="答案解析"
     ></Input>
  </FormItem>
 </Form>
 <div slot="footer">
  <Button type="text" @click="cancelQuestion">取消</Button>
  <Button type="primary" :loading="saveLoading" @click="saveQuestion">保存</Button>
 </div>
</Modal>

Exam exam = new Exam();
List<Question> questions = reader.findRandom(manager.getExamDataBase(), ExamConstant.QUESTION_COLLECT, new Document(), Question.class, no);
exam.setTitle(title);
exam.setDuration(dutation);
return exam;