MongoInit.java是数据库初始化及连接类

MongoUtils.java是对mongodb的各种操作方法

MongoInit.java

package com.wlwcloud.datatest;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.UnknownHostException;
import java.util.Properties;

import org.apache.log4j.Logger;

import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.Mongo;
import com.mongodb.MongoOptions;
import com.mongodb.ServerAddress;

/**
 * Mongo工具类:设计为单例模式，每当月份发生变化，数据库连接名称就会发生变化，这是业务规则 因MongoDB的Java驱动是线程安全的，对于一般的应用，只要一个Mongo实例即可，Mongo有个内置的连接池（池大小默认为10个）。
 * 对于有大量写和读的环境中，为了确保在一个Session中使用同一个DB时，我们可以用以下方式保证一致性： DB mdb =mongo.getDB(‘dbname‘); mdb.requestStart(); // 业务代码 mdb.requestDone();
 * DB和DBCollection是绝对线程安全的
 * @author undoner
 */
public class MongoInit {
	/** DB监听端口号 */
	private static int DBPort = 27017;
	/** DB连接URL */
	private static String DBUrl = "localhost";
	/** 连接DB库名称 */
	private static String DBName = "wlwdb";
	static Logger log = Logger.getRootLogger();
	private static Mongo mongo;
	private static DBCollection coll;
	private static DB db;

	static {
		try {
			DBproperties();
			MongoOptions options = new MongoOptions();
			options.autoConnectRetry = true;
			options.connectionsPerHost = 1000;
			options.maxWaitTime = 5000;
			options.socketTimeout = 0;
			options.connectTimeout = 15000;
			options.threadsAllowedToBlockForConnectionMultiplier = 5000;
			// 事实上，Mongo实例代表了一个数据库连接池，即使在多线程的环境中，一个Mongo实例对我们来说已经足够了
			ServerAddress serverAddress = new ServerAddress(DBUrl, DBPort);
			mongo = new Mongo(serverAddress, options);
		} catch (UnknownHostException e) {
			log.info("get mongo instance failed");
		}
	}

	static void DBproperties() {
		// 读取配置文件config.properties中的属性值
		String myFilePath = MongoInit.class.getResource("/").getPath() + "MongoDBConfig.properties";
		Properties properties = new Properties();
		FileInputStream fileInputStream = null;
		try {
			   fileInputStream = new FileInputStream(myFilePath);
			   properties.load(fileInputStream);
			   DBPort = Integer.parseInt((String) properties.getProperty("DBPort"));
			   DBUrl = (String) properties.getProperty("DBUrl");
			   DBName = (String) properties.getProperty("DBName");
			  } catch (Exception e) {
			   e.printStackTrace();
			  } finally {
			   try {
			    fileInputStream.close();
			   } catch (IOException e) {
			    // TODO Auto-generated catch block
			    e.printStackTrace();
			   }
		}

	}

	public static DB getDB() {
		if (db == null) {
			db = mongo.getDB(DBName);
		}
		return db;
	}

	public static Mongo getMong() {
		return mongo;
	}

	public static DBCollection getColl(String collname) {
		return getDB().getCollection(collname);
	}

}

package com.wlwcloud.datatest;

import java.net.UnknownHostException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.ketayao.ketacustom.entity.main.User;
import com.ketayao.utils.SecurityUtils;
import com.mongodb.AggregationOutput;
import com.mongodb.BasicDBList;
import com.mongodb.BasicDBObject;
import com.mongodb.BasicDBObjectBuilder;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.MapReduceCommand;
import com.mongodb.MapReduceOutput;
import com.mongodb.Mongo;
import com.mongodb.MongoException;
import com.mongodb.QueryBuilder;
import com.mongodb.WriteConcern;

public class MongoUtils {
	//DBCursor cursor = coll.find(condition).addOption(Bytes.QUERYOPTION_NOTIMEOUT);//设置游标不要超时  
     
    /** 
     * 获取所有数据库实例 
     */  
    public void testGetDBS() {  
        List<String> dbnames = MongoInit.getMong().getDatabaseNames();  
        for (String dbname : dbnames) {  
            System.out.println("dbname:" + dbname);  
        }  
    }  
  
     
    /** 
     * 删除数据库 
     */  
    public void dropDatabase(String dbname) {  
        MongoInit.getMong().dropDatabase(dbname);  
    }  
  
     
    /** 
     * 查询所有表名 
     */  
    public void getAllCollections() {  
        Set<String> colls = MongoInit.getDB().getCollectionNames();  
        for (String s : colls) {  
            System.out.println("Collections:"+s);  
        }  
    }  
  
    /** 
     * 删除一个表 
     */  
    public void dropCollection(String collection) {  
        MongoInit.getColl(collection).drop();  
    }  
  
    /** 
     * 添加一条记录 
     */  
     
    public void addData(String dbCollection,String dataID,String dataTime,String dataContent,String dataStatus) {  
        DBCollection coll = MongoInit.getColl(dbCollection);  
        BasicDBObject doc = new BasicDBObject();  
        doc.put("id", dataID);  
        doc.put("time", dataTime);  
        doc.put("data", dataContent);  
        doc.put("status", dataStatus);  
        coll.insert(doc);  
        // 设定write concern，以便操作失败时得到提示  
        coll.setWriteConcern(WriteConcern.SAFE);  
        findOne(dbCollection);
    }  
  
     
    /** 
     * 创建索引 
     */  
    public void createIndex(String collection) {  
        MongoInit.getColl(collection).createIndex(new BasicDBObject("index_id", 1));  
    }  
  
     
    /** 
     * 获取索引信息 
     */  
    public void getIndexInfo(String dbCollection) {  
        List<DBObject> list = MongoInit.getColl(dbCollection).getIndexInfo();  
        for (DBObject o : list) {  
            System.out.println(o);  
        }  
    }  
  
     
    /** 
     * 添加多条记录 
     */  
    public void addMultiData() {  
        for (int i = 0; i < 100; i++) {  
            MongoInit.getColl("wujintao").insert(  
                    new BasicDBObject().append("i", i));  
        }  
  
        List<DBObject> docs = new ArrayList<DBObject>();  
        for (int i = 0; i < 50; i++) {  
            docs.add(new BasicDBObject().append("i", i));  
        }  
        MongoInit.getColl("wujintao").insert(docs);  
        // 设定write concern，以便操作失败时得到提示  
        MongoInit.getColl("wujintao").setWriteConcern(WriteConcern.SAFE);  
    }  
  
     
    /** 
     * 查找第一条记录 
     */  
    public void findOne(String dbCollection) {  
        DBObject myDoc = MongoInit.getColl(dbCollection).findOne();  
        System.out.println(myDoc);  
    }  
  
     
    /** 
     * 获取表中所有记录条数 
     */  
    public void count(String dbCollection) {  
        System.out.println(MongoInit.getColl(dbCollection).getCount());  
        System.out.println(MongoInit.getColl(dbCollection).count());  
    }  
  
     
    /** 
     * 获取查询结果集的记录数 
     */  
    public void getCount(String dbCollection,String dataID) {  
        DBObject query = new BasicDBObject("id", dataID);  
        long count = MongoInit.getColl(dbCollection).count(query);  
        System.out.println(count);  
    }  
  
     
    /** 
     * 查询所有结果 
     */  
    public void getAllDocuments(String dbCollection) {  
        DBCursor cursor = MongoInit.getColl(dbCollection).find();  
        try {  
            while (cursor.hasNext()) {  
                System.out.println(cursor.next());  
            }  
        } finally {  
            cursor.close();  
        }  
    }  
  
     
    /** 
     * 按照一个条件查询 
     */  
    public void queryByConditionOne() {  
        BasicDBObject query = new BasicDBObject();  
        query.put("name", "MongoDB");  
        DBCursor cursor = MongoInit.getColl("wujintao").find(query);  
  
        try {  
            while (cursor.hasNext()) {  
                System.out.println(cursor.next());  
            }  
        } finally {  
            cursor.close();  
        }  
    }  
    public List<SensorData> queryById(String id) { 
    	User user = SecurityUtils.getLoginUser();
        BasicDBObject query = new BasicDBObject();  
        System.out.print(id);
        query.put("id", id);  
        String table="table_";
        DBCursor cursor = MongoInit.getColl("table_"+user.getUsername()).find(query);  
        List<DBObject> list=cursor.toArray();
        System.out.println(list.size());
        System.out.println("dao.."+list.toString());
        List<SensorData> sensordata=http://www.mamicode.com/new ArrayList();>
MongoDBConfig.properties
#端口设置
DBPort=27017
#URL
DBUrl=localhost
#URL
DBName=wlwdb


MongoDB之Java测试代码（DAO层）