mongoDB 学习笔记（十）MongoDBUtil

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本文介绍了一种使用Java连接MongoDB数据库的方法，包括无认证连接和带认证连接的实现方式。通过具体的代码示例，展示了如何创建MongoClient，获取MongoDatabase实例，并在需要时进行身份验证。

import java.util.ArrayList;
import java.util.List;

import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import com.mongodb.client.MongoDatabase;
 
public class MongoDBUtil {
	
    //不认证
    public static MongoDatabase getConnect(String host,int port,String dbName){
        MongoClient mongoClient = new MongoClient(host, port);
        MongoDatabase mongoDatabase = mongoClient.getDatabase(dbName);
        mongoClient.close();
        return mongoDatabase;
    }
    
    public static MongoDatabase getConnect(String dbName){
        return getConnect("127.0.0.1", 27017,dbName);
    }
 
    //认证
    public static MongoDatabase getConnectWithAuth(String host,int port,String dbName,String userName,String password){
        List<ServerAddress> adds = new ArrayList<>();
        ServerAddress serverAddress = new ServerAddress(host, port);
        adds.add(serverAddress);
        List<MongoCredential> credentials = new ArrayList<>();
        MongoCredential mongoCredential = MongoCredential.createScramSha1Credential(dbName, dbName, password.toCharArray());
        credentials.add(mongoCredential);
        MongoClient mongoClient = new MongoClient(adds, credentials);
        MongoDatabase mongoDatabase = mongoClient.getDatabase(dbName);
        mongoClient.close();
        return mongoDatabase;
    }
    
    public static MongoDatabase getConnectWithAuth(String dbName,String userName,String password){
    	return getConnectWithAuth("127.0.0.1", 27017, dbName, userName, password);
    }
}