java软件程序智能安装:win7_64+Eclipse+maven
  一、准备工作
  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/
  二、安装Mongo
  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
  whpx.net/peixunjigou/20140627143039343/show.html?iid=663850
  #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
  whpx.net/peixunjigou/20140627143039343/show.html?iid=664681
  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
  whpx.net/peixunjigou/20140627143039343/show.html?iid=665844
  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
  whpx.net/peixunjigou/20140627143039343/show.html?iid=663196
  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
   whpx.net/peixunjigou/20140627143039343/show.html?iid=666533
   > show dbs
   admin (empty)
   local 0.078GB
   > use admin(切换管理用户)
   switched to db admin
   > db.mymongo(创建数据库)
   admin.mymongo
   > db.addUser("root","root")(添加用户)
   WARNING: The 'addUser' shell helper is DEPRECATED. Please use 'createUser' instead
   Successfully added user: { "user" : "root", "roles" : [ "root" ] }
   > db.auth("root","root")(添加登陆用户)
   whpx.net/peixunjigou/20140627143039343/show.html?iid=666999
   1
   > db.createCollection("t_users")(添加表)
   { "ok" : 1 }
   > show collections(显示表)
   system.indexes
   system.users
   system.version
   t_users
   > db.t_users.save({age:21})(存储数据)
   WriteResult({ "nInserted" : 1 })
   > db.t_users.find()(查询所有数据)
   { "_id" : ObjectId("53a2e45e4a674863b4ac5398"), "age" : 21 }
   mongodb 删除数据库
   use mymongo;
   db.dropDatabase();
   whpx.net/peixunjigou/20140627143039343/show.html?iid=667805
   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:
  Java代码
  rm -f /app/hadoop/db/mongod.lock
  也即删除指定数据目录下的mongod.lock文件即可。
  正常停止方法:
  kill -2 PID
  或者
  Java代码
  ./mongo -host ip:port
  先连接需要停止的服务,然后:
  Java代码

whpx.net/peixunjigou/20140627143039343/show.html?iid=668575
   >use admin
   >db.shutdownServer();


  这样也可以正常停止服务。
  三、Java操作MongoDB示例
  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 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");
   whpx.net/peixunjigou/20140627143039343/show.html?iid=669771
   u.setTp(12);
   String obj2Json = JsonUtils.getSingletonInstance().obj2Json(u);
   BasicDBObject dbObject1=new BasicDBObject();
   dbObject1.put("key", "123131");
   dbObject1.put("value", obj2Json);
   collection2.save(dbObject1);
   BasicDBObject dbObject=new BasicDBObject();
   whpx.net/peixunjigou/20140627143039343/show.html?iid=670550
   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());
   whpx.net/peixunjigou/20140627143039343/show.html?iid=671371
   }
   } 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.
   whpx.net/peixunjigou/20140627143039343/show.html?iid=671862
   *
   *
   */
   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;
   whpx.net/peixunjigou/20140627143039343/show.html?iid=672236
   import com.mongodb.DBCursor;
   import com.mongodb.DBObject;
   import com.mongodb.Mongo;
   import com.mongodb.MongoClient;
   /**
   whpx.net/peixunjigou/20140627143039343/show.html?iid=672717
   * 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;
   whpx.net/peixunjigou/20140627143039343/show.html?iid=673085
   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) {
   whpx.net/peixunjigou/20140627143039343/show.html?iid=673482
   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 {
   whpx.net/peixunjigou/20140627143039343/show.html?iid=662724
   whpx.net/peixunjigou/20140627143039343/show.html?iid=674014
   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
   */
   whpx.net/peixunjigou/20140627143039343/show.html?iid=674574
   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
   whpx.net/peixunjigou/20140627143039343/show.html?iid=675063
   * @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 get(String cacheName, String key, Class classOfT) {
   DBCollection cache = this.db.getCollection(cacheName);
   List 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 getKeys(String cacheName){
   List list = new ArrayList();
   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)))