使用java操作MongoDB

標籤：mongodb      drive   下載   插入   com   collect   date   remove   

1.環境準備

下載mongoDB對Java支援的驅動包

驅動包：https://github.com/mongodb/mongo-java-driver/downloads

 

2.查詢集合中所有文檔

Mongo mongo = new Mongo("localhost",27017);DB db = mongo.getDB("test");DBCollection collection = db.getCollection("customer");DBCursor dbCursor = collection.find();System.out.println(collection.getCount());while(dbCursor.hasNext()){System.out.println(dbCursor.next());}mongo.close();

3.刪除集合中的文檔

Mongo mongo = new Mongo("localhost",27017);DB db = mongo.getDB("test");DBCollection collection = db.getCollection("customer");BasicDBObject o = new BasicDBObject("_id", new ObjectId("5199ee647d5fc789bc760c07"));collection.remove(o);mongo.close();

4.向集合中插入文檔

Mongo mongo = new Mongo("localhost",27017);DB db = mongo.getDB("test");DBCollection collection = db.getCollection("customer");DBObject c = new BasicDBObject();c.put("name", “jack");c.put("age", 24);collection.insert(c);mongo.close();

5.更新集合中的文檔

Mongo mongo = new Mongo("localhost",27017);DB db = mongo.getDB("test");DBCollection collection = db.getCollection("customer");BasicDBObject query = new BasicDBObject("_id",new ObjectId("519e2e393296cf3baccdb10c"));BasicDBObject object = (BasicDBObject) collection.findOne(query);object.put("name", “wangwu");int n = collection.update(query, object).getN();System.out.println(n);mongo.close();

　　

　　

　

 

使用java操作MongoDB