兩個方法都是可以實現(xiàn)連接mongodb
mongo方法
import java.net.UnknownHostException; import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBObject; import com.mongodb.Mongo; public class Test { public static void main(String[] args) { try { /**** Connect to MongoDB ****/ // Since 2.10.0, uses MongoClient //MongoClient mongo = new MongoClient("localhost", 27017); Mongo mongo = new Mongo("127.0.0.1",27017); /**** Get database ****/ // if database doesn't exists, MongoDB will create it for you DB db = mongo.getDB("testMongoDb"); //database username root and passWord root boolean ok = db.authenticate("root","root".toCharArray()); if(ok){ System.out.使用mongoClient方法 static final String DBName = "weibo"; static final String ServerAddress = "127.0.0.1"; static final int PORT = 27017; public MongoHelper(){ } public MongoClient getMongoClient( ){ MongoClient mongoClient = null; try { // 連接到 mongodb 服務(wù) mongoClient = new MongoClient(ServerAddress, PORT); System.out.println("Connect to mongodb successfully"); } catch (Exception e) { System.err.println(e.getClass().getName() + ": " + e.getMessage()); } return mongoClient; } public MongoDatabase getMongoDataBase(MongoClient mongoClient) { MongoDatabase mongoDataBase = null; try { if (mongoClient != null) { // 連接到數(shù)據(jù)庫 mongoDataBase = mongoClient.getDatabase(DBName); System.out.println("Connect to DataBase successfully"); } else { throw new RuntimeException("MongoClient不能夠為空"); } } catch (Exception e) { e.printStackTrace(); } return mongoDataBase; } public void closeMongoClient(MongoDatabase mongoDataBase,MongoClient mongoClient ) { if (mongoDataBase != null) { mongoDataBase = null; } if (mongoClient != null) { mongoClient.close(); } System.out.println("CloseMongoClient successfully"); }區(qū)別: 參考:http://blog.itpub.net/30341463/viewspace-1758585/ 官方文檔和源代碼均建議使用MongoClient類，而且，在不久的將來，會廢棄Mongo類。
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