SpringBoot中的MongoTemplate的各种条件查询示例详解

    /**
     * 指定field查询
     */
    public void specialFieldQuery() {
        Query query = new Query(Criteria.where("user").is("用户名blog"));
        // 查询一条满足条件的数据
        Map result = mongoTemplate.findOne(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | specialFieldQueryOne: " + result);

        // 满足所有条件的数据
        List<Map> ans = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | specialFieldQueryAll: " + ans);
    }

    /**
     * 多个查询条件同时满足
     */
    public void andQuery() {
        Query query = new Query(Criteria.where("user").is("用户名blog").and("age").is(18));
        Map result = mongoTemplate.findOne(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | andQuery: " + result);
    }

    /**
     * 或查询
     */
    public void orQuery() {
        // 等同于 db.getCollection('demo').find({"user": "用户名blog", $or: [{ "age": 18}, { "sign": {$exists: true}}]})
        Query query = new Query(Criteria.where("user").is("用户名blog")
                .orOperator(Criteria.where("age").is(18), Criteria.where("sign").exists(true)));
        List<Map> result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | orQuery: " + result);

        // 单独的or查询
        // 等同于Query: { "$or" : [{ "age" : 18 }, { "sign" : { "$exists" : true } }] }, Fields: { }, Sort: { }
        query = new Query(new Criteria().orOperator(Criteria.where("age").is(18), Criteria.where("sign").exists(true)));
        result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | orQuery: " + result);
    }

    /**
     * in查询
     */
    public void inQuery() {
        // 相当于:
        Query query = new Query(Criteria.where("age").in(Arrays.asList(18, 20, 30)));
        List<Map> result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | inQuery: " + result);
    }

    /**
     * 数字类型，比较查询 >
     */
    public void compareBigQuery() {
        // age > 18
        Query query = new Query(Criteria.where("age").gt(18));
        List<Map> result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | compareBigQuery: " + result);

        // age >= 18
        query = new Query(Criteria.where("age").gte(18));
        result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | compareBigQuery: " + result);
    }

    /**
     * 数字类型，比较查询 <
     */
    public void compareSmallQuery() {
        // age < 20
        Query query = new Query(Criteria.where("age").lt(20));
        List<Map> result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | compareSmallQuery: " + result);

        // age <= 20
        query = new Query(Criteria.where("age").lte(20));
        result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | compareSmallQuery: " + result);
    }


    /**
     * 正则查询
     */
    public void regexQuery() {
        Query query = new Query(Criteria.where("user").regex("^用户名blog"));
        List<Map> result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | regexQuery: " + result);
    }

    /**
     * 查询总数
     */
    public void countQuery() {
        Query query = new Query(Criteria.where("user").is("用户名blog"));
        long cnt = mongoTemplate.count(query, COLLECTION_NAME);
        System.out.println("query: " + query + " | cnt " + cnt);
    }

    /**
     * 查询总数
     */
    public void countQuery() {
        Query query = new Query(Criteria.where("user").is("用户名blog"));
        long cnt = mongoTemplate.count(query, COLLECTION_NAME);
        System.out.println("query: " + query + " | cnt " + cnt);
    }


    /**
     * 排序查询
     */
    public void sortQuery() {
        // sort查询条件，需要用with来衔接
        Query query = Query.query(Criteria.where("user").is("用户名blog")).with(Sort.by("age"));
        List<Map> result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | sortQuery " + result);
    }

    /**
     * 分页查询
     */
    public void pageQuery() {
        // limit限定查询2条
        Query query = Query.query(Criteria.where("user").is("用户名blog")).with(Sort.by("age")).limit(2);
        List<Map> result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | limitPageQuery " + result);


        // skip()方法来跳过指定数量的数据
        query = Query.query(Criteria.where("user").is("用户名blog")).with(Sort.by("age")).skip(2);
        result = mongoTemplate.find(query, Map.class, COLLECTION_NAME);
        System.out.println("query: " + query + " | skipPageQuery " + result);
    }

    @ApiOperation("测试查询")
    @PostMapping("/getTestList")
    public Response<IPage<TicketResp>> getTestList(TicketVo ticket,
                                                     @RequestParam(required = false) Integer pageNum,
                                                     @RequestParam(required = false) Integer pageSize) {
        if(null == pageNum || null == pageSize){
            pageNum = 1;pageSize = 10;
        }
        IPage<TicketResp> page = new Page<>(pageNum,pageSize);
        page = ticketService.getMyTicketList(page,ticket);
        //return Response.ok(page);
//        Criteria criteria = Criteria.where("_id").is(ticket.getTicketKey())
//                .and("ticketContent.createUser").is("110201010");
        Criteria criteria = Criteria.where("ticketContent.createUser").is("110201010");
        Query query = new Query(criteria);
        List<TicketInfo> objList = mongoTemplate.find(query, TicketInfo.class);
        return Response.ok(objList);
//        History history = null;
//        //封装对象列表查询条件
//        List<AggregationOperation> commonOperations = new ArrayList<>();
//        //1. 指定查询主文档
//        MatchOperation match = Aggregation.match(Criteria.where("userId").is("2"));
//        commonOperations.add(match);
//        //2. 指定投影，返回哪些字段
//        ProjectionOperation project = Aggregation.project("historyList");
//        commonOperations.add(project);
//        //3. 拆分内嵌文档
//        UnwindOperation unwind = Aggregation.unwind("historyList");
//        commonOperations.add(unwind);
//        //4. 指定查询子文档
//        MatchOperation match2 = Aggregation.match(
//                Criteria.where("historyList.hh").is("2"));
//        commonOperations.add(match2);
//
//        //创建管道查询对象
//        Aggregation aggregation = Aggregation.newAggregation(commonOperations);
//        AggregationResults<JSONObject> reminds = mongoTemplate
//                .aggregate(aggregation, "history", JSONObject.class);
//        List<JSONObject> mappedResults = reminds.getMappedResults();
//        if (mappedResults != null && mappedResults.size() > 0) {
//            history = JSONObject
//                    .parseObject(mappedResults.get(0).getJSONObject("historyList").toJSONString(), History.class);
//        }
    }