Java中mongodb使用MongoCollection和BasicDBObject条件查询

痛定思痛。 2023-02-11 07:17 27阅读 0赞

本文转自：[https://www.cnblogs.com/richard-ju/p/L2018006.html][https_www.cnblogs.com_richard-ju_p_L2018006.html]

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MongoClient mongoClient = new MongoClient( "172.26.xxx.xxx" , 27017 );
    MongoDatabase mongoDatabase =mongoClient.getDatabase("xxxx");
    MongoCollection<Document> collection = mongoDatabase.getCollection("test_logs");
    //加入查询条件
    BasicDBObject query = new BasicDBObject();
    //时间区间查询 记住如果想根据这种形式进行时间的区间查询 ，存储的时候 记得把字段存成字符串，就按yyyy-MM-dd HH:mm:ss 格式来
    query.put("times", new BasicDBObject("$gte", "2018-06-02 12:20:00").append("$lte","2018-07-04 10:02:46"));
    //模糊查询
    Pattern pattern = Pattern.compile("^.*王.*$", Pattern.CASE_INSENSITIVE);
    query.put("userName", pattern);
    //精确查询
    query.put("id", "11");
    //skip 是分页查询，从第0条开始查10条数据。 Sorts是排序用的。有descending 和ascending
    MongoCursor<Document> cursor = collection.find(query).sort(Sorts.orderBy(Sorts.descending("times"))).skip(0).limit(10).iterator();//
    int unm=0;
    try {
         while (cursor.hasNext()) {
              UserBehaviorLogs userBehaviorLogs = new UserBehaviorLogs();
              //查询出的结果转换成jsonObject,然后进行封装或者直接返回给前端处理。我这是封装成对象了
              JSONObject jsonObject = JSONObject.parseObject( cursor.next().toJson().toString());
              userBehaviorLogs.setId(jsonObject.getString("id"));//id
              userBehaviorLogs.setUserId(jsonObject.getString("userId"));//用户id
              userBehaviorLogs.setUserName(jsonObject.getString("userName"));//用户名称
              userBehaviorLogs.setParams(jsonObject.getString("params"));//参数
              userBehaviorLogs.setException(jsonObject.getString("Exception"));//异常信息
              userBehaviorLogs.setTimes(jsonObject.getString("times")+"");//创建时间
              unm++;               System.out.println(unm+"="+userBehaviorLogs.getTimes()+"==="+userBehaviorLogs.getId());
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        cursor.close();
    }

[https_www.cnblogs.com_richard-ju_p_L2018006.html]: https://www.cnblogs.com/richard-ju/p/L2018006.html