Java操作Mongodb

添加Mongodb驅動到你的classpath環境中

package com.mongodb;public class Mongodb {        private Mongo mongo;    private DBCollection dbCollection;    private DB db;        public Mongodb() throws Exception{        //使用ip地址创建Mongo对象        mongo=new Mongo("127.0.0.1");        //获取orcl数据库        db=mongo.getDB("orcl");        //判断是否存在集合person        boolean b=db.collectionExists("person");        System.out.println("是否存在集合[person]:"+b);        dbCollection = db.getCollection("person");        long count=dbCollection.count();        System.out.println("总记录数是:"+count);        DBCursor cursor =dbCollection.find().skip(20).limit(20);        while(cursor.hasNext()){            System.out.println(cursor.next());        }                    }                public void list(){        dbCollection=db.getCollection("person");        BasicDBObject dbObject=new BasicDBObject();        dbObject.put("age", new BasicDBObject("$gt",20).append("$lt", 60));        DBCursor cursor = dbCollection.find(dbObject);        System.out.println(cursor.count());        while(cursor.hasNext()){            System.out.println(cursor.next());        }            }                private boolean insert(){                dbCollection=db.getCollection("person");        BasicDBObject dbObject=new BasicDBObject();        dbObject.put("name", "zhangsan");        dbObject.put("age", 20);        WriteResult writeResult = dbCollection.save(dbObject);        System.out.println(writeResult.getN());        return false;    }        private boolean delete(){        dbCollection=db.getCollection("person");        BasicDBObject dbObject=new BasicDBObject();        dbObject.put("name", "zhangsan");        WriteResult writeResult = dbCollection.remove(dbObject);        System.out.println(writeResult.getN());        return false;    }            private boolean update(){        dbCollection=db.getCollection("person");        BasicDBObject dbObject=new BasicDBObject();        dbObject.put("name", "s0020");        BasicDBObject dbObject2=new BasicDBObject();        dbObject2.put("name", "s0020");        dbObject2.put("age", 65);        WriteResult writeResult = dbCollection.update(dbCollection.findOne(dbObject), dbObject2);        System.out.println(writeResult.getN());        return false;    }            private Object getOne(){        dbCollection=db.getCollection("person");        BasicDBObject dbObject=new BasicDBObject();        dbObject.put("name", "s0020");        //dbObject.put("age", 65);        DBObject object=dbCollection.findOne(dbObject);        System.out.println(object.toMap().get("name")+"\t"+object.toMap().get("age"));        return object;    }            public static void main(String[] args) throws Exception{        Mongodb mongodb=new Mongodb();        //mongodb.insert();        //mongodb.getOne();        //mongodb.update();        //mongodb.delete();        //mongodb.list();    }}