标签:mongodb
本文使用的环境是:win7_64+Eclipse+maven下载java驱动包
驱动包下载地址:http://mvnrepository.com/artifact/org.mongodb/mongo-java-driver
mongoDB下载:http://www.mongodb.org/
在线api:http://docs.mongodb.org/manual/applications/drivers/
1.windows下安装方式:
安装Mongo数据库:
第一步:下载安装包:如果是win系统,注意是64位还是32位版本的,请选择正确的版本。
第二步:新建目录“D:\MongoDB”,解压下载到的安装包,找到bin目录下面全部.exe文件,拷贝到刚创建的目录下。
第三步:在“D:\MongoDB”目录下新建“data”文件夹,它将会作为数据存放的根文件夹。
配置Mongo服务端:
打开CMD窗口,按照如下方式输入命令:
> d:
> cd D:\MongoDB
> mongod --dbpath D:\MongoDB\data
启动成功后从浏览器访问:http://localhost:27017/
标明windows下的mongodb已经启动成功;
2.linux安装方式:
下载后解压确保数据库目录大小剩余空间在3G以上;
这里采用配置文件方式启动:在mongodb的根目录创建一个名为:mongodb.conf的文件,内容如下:
#fork=true #以守护进程的方式运行,创建服务器进程 ##master=true #单主从配置时设为主服务器 ##salve=true ##单主从配置时设为从服务器 #replSet=blort #设置富本集的名字 #shardsvr=true #设置是否分片 #repairpath = /mongodb2.6.3/repair #pidfilepath = /mongodb2.6.3/mongodb.pid #sysinfo = true #verbose = true #cpu = true #Network and security set #Management #nohttpinterface = true #rest = true #syncdelay = 5 #Directory and relavent set dbpath = /mongodb2.6.3/data #数据库路径 logpath = /mongodb2.6.3/logs/mongodb.log #日志输出文件路径 logappend = true #日志输出方式 directoryperdb = true noauth = true port = 8888 #端口号 maxConns = 1024 fork = true quota = true quotaFiles = 1024 nssize = 16
启动方式如下:/mongodb2.6.3/bin/mongod -f /mongodb2.6.3/mongodb.conf
记得开启linux的访问端口:
#vi /etc/sysconfig/iptables
yy复制一行
p粘贴
修改端口
#service iptables restart
设置开机自启动
#echo /mongodb2.6.3/bin/mongod -f /mongodb2.6.3/mongodb.config >>/etc/rc.local
数据库启动完成,接下来是创建数据库和集合:
mongo --port 8888
mongodb 删除数据库
use mymongo;
db.dropDatabase();
mongodb删除表
db.t_users.drop();
MongoDB服务停止:
在linux下大家停止很多服务都喜欢直接kill -9 PID,但是对于MongoDB如果执行了kill -9 PID,在下次启动时可能提示错误,导致服务无法启动,这个时候可以通过执行:
1、 建立Test.java,完成简单的mongoDB数据库操作
try { Mongo mg = new MongoClient("192.168.186.129", 8888); DB db = mg.getDB("mymongo"); // 用于判断用户登录 // if(!db.authenticate("sdap", "sdap123".toCharArray())){ // 方法已经不建议使用 // } Set<String> collectionNames = db.getCollectionNames(); for (String string : collectionNames) { System.out.println(string); } DBCollection collection2 = db.getCollection("t_users2"); collection2 = db.getCollection("t_users2"); CarPasitionObj u = new CarPasitionObj(); u.setLa(1231d); u.setLo(42342d); u.setPn("京1aaa"); u.setTp(12); String obj2Json = JsonUtils.getSingletonInstance().obj2Json(u); BasicDBObject dbObject1=new BasicDBObject(); dbObject1.put("key", "123131"); dbObject1.put("value", obj2Json); collection2.save(dbObject1); <pre name="code" class="java"> BasicDBObject dbObject=new BasicDBObject(); dbObject.put("key", "123131"); DBCursor find = collection2.find(dbObject); while (find.hasNext()) { DBObject next = find.next(); String key = (String)next.get("key"); String json = (String)next.get("value"); System.out.println(key); CarPasitionObj formJson = JsonUtils.getSingletonInstance().formJson(json, CarPasitionObj.class); System.out.println(formJson.getPn()); } } catch (UnknownHostException e) { e.printStackTrace(); }
下面贴上我自己的mongodb的工具类:
/** * Project Name:main * File Name:MongodbCacheManagerUtil.java * Package Name:com.hdsx.taxi.driver.cq.cache * Date:2014年4月9日下午12:49:55 * Copyright (c) 2014, sid Jenkins All Rights Reserved. * * */ package com.hdsx.taxi.driver.cq.mongodb; import java.net.UnknownHostException; import java.util.ArrayList; import java.util.List; import org.apache.log4j.Logger; import com.hdsx.taxi.driver.cq.module.InitServletModule; import com.hdsx.taxi.driver.cq.tcp.util.JsonUtils; import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject; import com.mongodb.Mongo; import com.mongodb.MongoClient; /** * ClassName:MongodbCacheManagerUtil * Function: TODO ADD FUNCTION. * Reason: TODO ADD REASON. * Date: 2014年4月9日 下午12:49:55 * @author sid * @see */ public class MongodbManagerUtil { private static final Logger logger = Logger.getLogger(MongodbManagerUtil.class); private Mongo mg = null; private DB db = null; private volatile static MongodbManagerUtil singleton = null; public static final String KEY = "key"; public static final String VALUE = "value"; public static MongodbManagerUtil getSingletonInstance() { if (singleton == null) { synchronized (MongodbManagerUtil.class) { if (singleton == null) { singleton = new MongodbManagerUtil(); } } singleton = new MongodbManagerUtil(); } return singleton; } private MongodbManagerUtil() { if (logger.isDebugEnabled()) { logger.debug("MongodbCacheManagerUtil() - start "); //$NON-NLS-1$ } try { mg = new MongoClient("192.168.186.129", 8888); db = mg.getDB("mymongo"); } catch (UnknownHostException e) { e.printStackTrace(); } if (logger.isDebugEnabled()) { logger.debug("MongodbCacheManagerUtil() - end"); //$NON-NLS-1$ } } /** * * getCache:(获取缓存对象). * * @author sid * @param name * @return */ public DBCollection getCache(String name){ return this.db.getCollection(name); } /** * * put:(在指定缓存对象中加入需要缓存的对象). * * @author sid * @param cacheName * @param key * @param value */ public void put(String cacheName, String key, Object value) { DBCollection cache = this.db.getCollection(cacheName); String obj2Json = JsonUtils.getSingletonInstance().obj2Json(value); BasicDBObject obj = new BasicDBObject(); obj.put(MongodbManagerUtil.KEY, key); obj.put(MongodbManagerUtil.VALUE, obj2Json); BasicDBObject basicDBObject = new BasicDBObject(MongodbManagerUtil.KEY, key); int size = cache.find(basicDBObject).count(); if (size==0) { cache.save(obj); }else{ cache.update(basicDBObject, obj); } } /** * * get:(根据key从指定缓存对象中获取对象). * * @author sid * @param cacheName * @param key * @return */ public <T> T get(String cacheName, String key, Class<T> classOfT) { DBCollection cache = this.db.getCollection(cacheName); List<DBObject> array = cache.find(new BasicDBObject(MongodbManagerUtil.KEY, key)).toArray(); if (array == null||array.size()==0) { return null; } DBObject dbObject = array.get(0); String json = (String)dbObject.get(MongodbManagerUtil.VALUE); return JsonUtils.getSingletonInstance().formJson(json, classOfT); } /** * * remove:(从指定缓存对象中清除对象). * * @author sid * @param cacheName * @param key */ public void remove(String cacheName, String key) { DBCollection cache = this.db.getCollection(cacheName); cache.remove(new BasicDBObject(MongodbManagerUtil.KEY,key)); } /** * * getKeys:(获取keys列表). * * @author sid * @param cacheName * @return */ public List<String> getKeys(String cacheName){ List<String> list = new ArrayList<String>(); DBCollection cache = this.db.getCollection(cacheName); DBCursor find = cache.find(); while (find.hasNext()) { DBObject next = find.next(); String key = (String) next.get(MongodbManagerUtil.KEY); list.add(key); } return list; } /** * * containsKey:(判断消息是否存在). * * @author sid * @param cacheName * @param key * @return */ public Boolean containsKey(String cacheName,String key){ DBCollection cache = this.db.getCollection(cacheName); BasicDBObject basicDBObject = new BasicDBObject(MongodbManagerUtil.KEY, key); int size = cache.find(basicDBObject).count(); if (size==0) { return false; }else{ return true; } } }除了save、insert、update;mongodb还有remove等操作
其中find方法可以指定查询条件:
大于等于:$gte
小于等于:$lte
不等于:$ne
demo:users.find(new BasicDBObject("age", new BasicDBObject("$gte", 24)))
mongoDB2.6,java使用详解,布布扣,bubuko.com
标签:mongodb
原文地址:http://blog.csdn.net/devilzy2656/article/details/34831629