BlogJava-雪山飞鹄-随笔分类-MongoDB

mongodb之morphia

雪山飞鹄 — Mon, 12 Mar 2012 08:49:00 GMT

lib目錄

morphia-0.99.jar
morphia-logging-slf4j-0.99.jar
morphia-validation-0.99.jar
cglib-nodep-2.1_3.jar
proxytoys-1.0.jar
mongo-2.7.3.jar
slf4j-log4j12-1.6.1.jar
log4j-1.2.15.jar
slf4j-api-1.6.1.jar

import org.bson.types.ObjectId;

import com.google.code.morphia.annotations.Id;

public class Address {
    @Id
    private ObjectId id;
    private String street;
    private String city;
    private String postCode;
    private String country;

    public ObjectId getId() {
        return id;
    }
    public void setId(ObjectId id) {
        this.id = id;
    }
    public String getStreet() {
        return street;
    }
    public void setStreet(String street) {
        this.street = street;
    }
    public String getCity() {
        return city;
    }
    public void setCity(String city) {
        this.city = city;
    }
    public String getPostCode() {
        return postCode;
    }
    public void setPostCode(String postCode) {
        this.postCode = postCode;
    }
    public String getCountry() {
        return country;
    }
    public void setCountry(String country) {
        this.country = country;
    }


}

import org.bson.types.ObjectId;

import com.google.code.morphia.annotations.Embedded;
import com.google.code.morphia.annotations.Entity;
import com.google.code.morphia.annotations.Id;

@Entity
public class Hotel {

    @Id
    private ObjectId id;
    private String name;
    private int stars;
    @Embedded
    private Address address;

    public ObjectId getId() {
        return id;
    }
    public void setId(ObjectId id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getStars() {
        return stars;
    }
    public void setStars(int stars) {
        this.stars = stars;
    }
    public Address getAddress() {
        return address;
    }
    public void setAddress(Address address) {
        this.address = address;
    }



}

import java.net.UnknownHostException;
import java.util.Iterator;
import java.util.List;

import org.bson.types.ObjectId;

import com.google.code.morphia.Datastore;
import com.google.code.morphia.Morphia;
import com.mongodb.Mongo;
import com.mongodb.MongoException;

public class Main {

    public static void main(String[] args) {
        try {
            Mongo mongo=new Mongo("127.0.0.1",27017);
            Morphia morphia=new Morphia();
            //映射Hotel、Address
            morphia.map(Hotel.class).map(Address.class);
            //创建数据库hotel
            Datastore datastore=morphia.createDatastore(mongo,"hotel");

            /*Hotel hotel=new Hotel();
            hotel.setName("Jiefang Hotel");
            hotel.setStars(3);

            Address address=new Address();
            address.setStreet("xi'an jiefang street");
            address.setCountry("China");
            address.setPostCode("710075");
            address.setCity("xi'an");

            hotel.setAddress(address);*/

            //持久化hotel到数据库
            //datastore.save(hotel);

            //根据ObjectId查询一条记录
            //String hotelId = "4f5dafcbf602eeffc946c648";
            //Hotel hote=datastore.get(Hotel.class,new ObjectId(hotelId));
            //System.out.println(hote.getName()+"\t"+hote.getAddress().getCountry()+"\t"+hote.getAddress().getStreet());

            //find 根据条件查询
            /*List hotels=datastore.find(Hotel.class, "stars > ", 3).asList();
            for (Iterator iterator = hotels.iterator(); iterator.hasNext();) {
                Hotel name = (Hotel) iterator.next();
                System.out.println(name.getName()+"\t"+name.getAddress().getCountry()+"\t"+name.getAddress().getStreet());
            }*/

            //find 根据条件查询星级大于1 按星级降序排列
            /*List hotels = datastore.find(Hotel.class, "stars > ", 1).order(" stars desc ").asList();
            for (Iterator iterator = hotels.iterator(); iterator.hasNext();) {
                Hotel name = (Hotel) iterator.next();
                System.out.println(name.getName()+"\t"+name.getAddress().getCountry()+"\t"+name.getAddress().getStreet());
            }*/


            //find 根据条件查询查询酒店名称是Jiefang Hotel
            Hotel hotel = datastore.find(Hotel.class, "name = ", "Jiefang Hotel").get();
            System.out.println(hotel.getName()+"\t"+hotel.getAddress().getCountry()+"\t"+hotel.getAddress().getStreet());


            List<Hotel> hotels=datastore.find(Hotel.class).asList();
            for (Iterator<Hotel> iterator = hotels.iterator(); iterator.hasNext();) {
                Hotel name = (Hotel) iterator.next();
                System.out.println(name.getId()+"\t"+name.getName()+"\t"+name.getAddress().getCountry()+"\t"+name.getAddress().getStreet());
            }

            //删除 King Hotel
            //datastore.findAndDelete(datastore.find(Hotel.class,"name","King Hotel"));

            /*System.out.println("--------------------删除后------------------");
            hotels=datastore.find(Hotel.class).asList();
            for (Iterator iterator = hotels.iterator(); iterator.hasNext();) {
                Hotel name = (Hotel) iterator.next();
                System.out.println(name.getId()+"\t"+name.getName()+"\t"+name.getAddress().getCountry()+"\t"+name.getAddress().getStreet());
            }*/


            //修改编号为4f5db225f6027225c6d87629的星级为8星级
            datastore.update(datastore.get(Hotel.class, new ObjectId("4f5db225f6027225c6d87629")), datastore.createUpdateOperations(Hotel.class).set("stars", 8));

            hotels=datastore.find(Hotel.class).asList();
            for (Iterator<Hotel> iterator = hotels.iterator(); iterator.hasNext();) {
                Hotel name = (Hotel) iterator.next();
                System.out.println(name.getId()+"\t"+name.getName()+"\t"+name.getStars()+"\t"+name.getAddress().getCountry()+"\t"+name.getAddress().getStreet());
            }

        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (MongoException e) {
            e.printStackTrace();
        }
    }

}

雪山飞鹄 2012-03-12 16:49 发表评论

Java操作Mongodb

雪山飞鹄 — Mon, 12 Mar 2012 08:05:00 GMT

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();
    }
}

雪山飞鹄 2012-03-12 16:05 发表评论