mongoDB2.6，java使用详解

#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 

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();
            
        }

/**
 * 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