MongoDB复杂Json数据的增删改查

本文讲解了MongoDB在java语言下的复杂用法，并附带案例。欢迎各位MongoDB使用者点赞收藏❥提出宝贵的意见。

TImetableDO数据结构：

{
  "orgId": "test_0c8bd2befcae",
  "level": 33,
  "studyStageCode": "test_4e6d1cb07db3",
  "startDate": 50,
  "endDate": 35,
  "timeTableName": "test_f3e7ab9cf540",
  "gradeTimetables": [
    {
      "gradeCode": "test_91d5ee05b73d",
      "gradeName": "test_616641b7e6db",
      "amStartTime": 30,
      "amStartMinute": 54,
      "amEndHour": 5,
      "amEndMinute": 80,
      "pmStartHour": 48,
      "pmStartMinute": 15,
      "pmEndHour": 68,
      "pmEndMinute": 13,
      "duration": 9,
      "classInterval": 77,
      "weeks": [
        {
          "weekNum": 92,
          "weekName": "test_a0c7db38d66e"
        }
      ],
      "lessons": [
        {
          "lessonCode": "test_2f27176bb524",
          "lessonName": "test_4877e17a365d"
        }
      ],
      "scheduleLessons": [
        {
          "weekNum": 27,
          "lessonCode": "test_64bb0f8f6297",
          "subjectCode": "test_5e4d93df1aa1",
          "subjectName": "test_ec76334cae9a",
          "teacherUser": "test_b8e5d0a1747a",
          "teacherName": "test_5977e370d39d",
          "mobile": "test_18747d63bc10",
          "schoolId": "test_c2ba7953dc06",
          "schoolName": "test_10e05269ab81"
        }
      ]
    }
  ],
  "createUser": "test_52c517640053",
  "createName": "test_de010b8aa98e",
  "updateUser": "test_dc57588627ac",
  "updateName": "test_8bf96510716a",
  "updateVersion": 21,
  "id": "test_d225da32cfd0",
  "createTime": "2014-10-29 02:07:11",
  "updateTime": "2029-08-08 02:34:23"
}

 查询单条：

示例1：二层结构查询

//根据年级、课表id-查询发布后的课表结构学科数据
Criteria criteria = Criteria.where(
"timetableId").is(vo.getTimetableId())
.and("gradeTimetables.gradeCode").is(vo.getGradeCode());
TimetableD0 tablePublishDb = mongoTemplate.findOne(Query. query(criteria)，TimetableD0.class);

示例2：三层结构查询

ScheduleLesson reqLesson = vo. getScheduleLessons.get(O) ;
Criteria criteria = new Criteria();
criteria.and("_id").is(new objectId(vo. getTimetableId())
.and("gradeTimetables.gradeCode").is(vo.getGradeCode())
.and("gradeTimetables.scheduleLessons.weekNum").is(reqLesson. getWeekNum())
.and("gradeTimetables.scheculeLessons.lessonCode").is(reqLesson. getLessonCode());
TimetableDO timetableD0 =mongoTemplate.findOne(Query.query(criteria)，TimetableD0.class);

多层结构类似上面的例子 

新增数据：

当新增的数据结构不存在时，会自动创建结构，可以使用这一方法，addToSet()

criteria = new Criteria();
criteria.and("_id").is(new 0bjectId(vo. getTimetableId())
.and("gradeTimetables.gradeCode").is(vo.getGradeCode());
Update update = new Update();
Query upQuery =Query.query(criteria);
upQuery = Query.query(criteria);
update.addToSet("gradeTimetables.$.scheduleLessons",reqLesson) ;
mongoTemplate.updateMulti(upQuery,update, mongoTemplate.getCollectionName(TimetableD0.class));

当新增的数据scheduleLessons结构存在，需要将数据追加到 scheduleLessons集合下：

TImetablePublishDO数据结构参考：

{
  "timetableId": "test_9dcfb1cce278",
  "orgId": "test_6c11a4a0f541",
  "level": 6,
  "weekStartDate": 74,
  "weekOfYear": 22,
  "timeTableName": "test_83e2eb0eaabe",
  "gradeTimetables": [
    {
      "gradeCode": "test_595a3c80a607",
      "gradeName": "test_f81e785c7e37",
      "lessons": [
        {
          "lessonCode": "test_cee22164732a",
          "lessonName": "test_2729825d7999"
        }
      ],
      "weeks": [
        {
          "weekNum": 6,
          "weekName": "test_4737db2d42a7"
        }
      ],
      "scheduleLessons": [
        {
          "weekNum": 26,
          "lessonCode": "test_5b5b5aca5680",
          "subjectCode": "test_1c81759285bc",
          "subjectName": "test_8a8ece8aaf9b",
          "teacherUser": "test_312420e06c84",
          "teacherName": "test_fb466fa3d249",
          "schoolId": "test_0f6cc223fda5",
          "schoolName": "test_dc6722d6fea3",
          "mobile": "test_1e72b8116113"
        }
      ],
      "timetableResources": [
        {
          "weekStartDate": 70,
          "weekOfYear": 35,
          "weekNum": 78,
          "lessonCode": "test_b4cd7a853c20",
          "date": 84,
          "fileInfos": [
            {
              "fileName": "test_11784cd6d2f6",
              "fileCode": "test_ba01c998e683",
              "fileId": "test_41d4c044c81b",
              "duration": 65,
              "status": 28,
              "onlineStatus": 85,
              "subjectCode": "test_8cba9df8ccd0"
            }
          ]
        }
      ]
    }
  ],
  "publishUser": "test_9e20649e2238",
  "publishName": "test_2f5c024039bf",
  "id": "test_ebcb7203fe31",
  "createTime": "2030-05-17 23:01:08",
  "updateTime": "2020-11-29 21:10:25"
}

TimeResourceDO数据结构参考：

{
  "timetableId": "test_5e2f93818261",
  "weekStartDate": 89,
  "weekOfYear": 80,
  "weekNum": 1,
  "lessonCode": "test_8e463424b9b1",
  "date": 20,
  "fileInfos": [
    {
      "fileName": "test_e2b697819be4",
      "fileCode": "test_b6c34f601983",
      "fileId": "test_469de84fc88a",
      "duration": 95,
      "status": 18,
      "onlineStatus": 7,
      "subjectCode": "test_d48941813229"
    }
  ],
  "subjectCode": "test_263e36c523c6",
  "subjectName": "test_1e38e268f251",
  "teacherUser": "test_5938a6ff97b0",
  "teacherName": "test_65579a61503f",
  "mobile": "test_a9aac5d63aab",
  "schoolId": "test_8f7d77a2542f",
  "schoolName": "test_6f51eb0e4cdc",
  "gradeCode": "test_0bf604459300",
  "id": "test_0346e4939916",
  "createTime": "2015-06-13 00:32:46",
  "updateTime": "2020-02-28 23:55:50"
} 

//查询集合中是否存在,不存在则新增，存在则更新
Criteria criteria = Criteria.where("timetableId").is(vo.getTimetableld())
.and(" weekOfYear").is(DateUtil. getWeekOfYearAtMonday(LocalDate.now())).and("gradeCode") .is(vo.getGradeCode())
.and("lessonCode").is(vo.getLessonCode()).and("weekNum").is(vo.getWeekMum())
.and("date").is(vo.getDate()) ;
if(mongoTemplate.count(Query.query(criteria),TimetableResourceD0.class)> 0){
    List fileList = vo.getFiles();
    List list = new ArrayList<~>() ;
    fileList.forEach(file ->{
        FileInfo fileInfo = new FileInfo();
        fileInfo.setFileCode(file.getFileCode());
        list.add(fileInfo) ;
    }) ;
    //更新内容
    Update update = new Update();
    Update.AddToSetBuilder f = update.addToSet("fileInfos");
    f.each(list);
    Query upQuery = Query.query(criteria) ;
    mongoTemplate.updatelulti(upQuery，update,   mongoTemplate.getCollectionName(TimetableResourceD0.class));
}
else {
    TimetableResourceD0 resourceD0 = new TimetableResourceDOO;
    resourceD0 = packData(resourceD0， vo);
    mongoTemplate.insert(resourceD0);
}

更新数据：

替换目标位置数据：(替换scheduleLessons集合)，使用set、addToSet

ScheduleLesson reqLesson = vo.getScheduleLessons().get(O);
Criteria criteria = new Criteria();
criteria.and("_id").is(new objectId(vo.getTimetableId()))
        .and("gradeTimetables.gradeCode").is(vo.getGradeCode())
        .and("gradeTimetables.scheduleLessons.weekNum ").is(reqLesson.getWeekNum())
        .and("gradeTimetables.scheduleLessons.lessonCode").is(reqLesson.getLessonCode());
Query upQuery = Query. query(criteria);
Update update = new Update().set("updateVersion", oldVersion + 1);
TimetableDO timetableDO =mongoTemplate.findOne(upQuery,TimetableD0.class);
if (objectUtil.isNotEmpty(timetableDO)){
    List scheduleLessons=timetableDO.getGradeTimetables().stream().
        filter(grade->
                ObjectUtil.equal(grade.getGradeCode(),vo.getGradeCode())
            .findFirst(
                .get().getScheduleLessons();
    scheduleLessons.removeIf(scheduleLesson->
            ObjectUtil.equal(scheduleLesson.getWeekNum(), reqLesson.getWeekNum())
            &&ObjectUtil.equal(scheduleLesson.getLessonCode(),reqLesson.        getLessonCode())));
    ScheduleLesson obj=new ScheduleLesson();
    BeanUtils.copyProperties(reqLesson, obj);
    scheduleLessons.add(obj);
    //更新内容
    update.set("gradeTimetables.$.scheduleLessons", scheduleLessons);    
    mongoTemplate. updateFirst(upQuery,update,mongoTemplate.getCollectionName(TimetableD0.class));
}
else {
    criteria = new Criteria();
    criteria. and("_id").is(new 0bjectId(vo.getTimetableId()))
    .and("gradeTimetables.gradeCode").is(vo.getGradeCode());
    upQuery = Query.query(criteria);
    update.addToSet("gradeTimetables.$.scheduleLessons", reqLesson);
    mongoTemplate.updateMulti(upQuery,update,   mongoTemplate.getCollectionName(TimetableD0.class));
}
 

查询比较简单就不写了；可以搜索其他文章。