实践：java连接mongodb并且认证

import java.util.*;

import net.sf.json.JSONObject;

import java.io.*;

import com.mongodb.MongoClient;

import com.mongodb.MongoException;

import com.mongodb.WriteConcern;

import com.mongodb.DB;

import com.mongodb.DBCollection;

import com.mongodb.BasicDBObject;

import com.mongodb.DBObject;

import com.mongodb.DBCursor;

import com.mongodb.ServerAddress;

import com.mongodb.MongoCredential;

import com.mongodb.client.MongoCollection;

import com.mongodb.client.MongoDatabase;

import org.bson.Document;

import java.util.Arrays;

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MongoClient mongoClient = null;

try {

//初始化用户名，数据库名，密码

MongoCredential credential = MongoCredential.createCredential("mclogadmin", "mclog", "mclogpass".toCharArray());

// To connect to mongodb server

ServerAddress addr = new ServerAddress("172.17.0.13", 17017);

//auth 连接

mongoClient =  new MongoClient(addr,Arrays.asList(credential));

//非auth连接

// mongoClient = new MongoClient( "172.17.0.16" , 17017 );

// Now connect to your databases

@SuppressWarnings("deprecation")

DB db = mongoClient.getDB(dbname);

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MongoClient mongoClient = null;

try{

MongoCredential credential = MongoCredential.createCredential("user", "db", "pass".toCharArray());

// To connect to mongodb server

ServerAddress addr = new ServerAddress("172.17.0.16", 27017);

mongoClient =  new MongoClient(addr,Arrays.asList(credential));

//      mongoClient = new MongoClient( "172.17.0.16" , 27017 );

// Now connect to your databases

@SuppressWarnings("deprecation")

DB db = mongoClient.getDB(dbname);

DBCollection getCollection=db.getCollection(collectionname);

getCollection.insert((DBObject)com.mongodb.util.JSON.parse(inputjson));

//  System.out.println("insert into " + collectionname + " with " + clickid );

//System.out.println("\n insert into " + collectionname + " with "  + inputjson );

//mongoClient.close();

} catch(Exception e) {

System.err.println( e.getClass().getName() + ": " + e.getMessage() );

}

finally{

if(mongoClient!=null) {

mongoClient.close();

}

}

注意： 在jdk7，eclipse中， mongoClient =  new MongoClient(addr,Arrays.asList(credential)); 报错The method asList(T[]) in the type Arrays is not applicable for the arguments 

例如，https://stackoverflow.com/questions/43341819/the-method-aslistt-in-the-type-arrays-is-not-applicable-for-the-arguments-i

 When I tried to create a list as follow

List l = Arrays.asList(1,2);

I got this error :

The method asList(T[]) in the type Arrays is not applicable for the

arguments (int, int).

最后，eclipse中修改代码为如下：

MongoCredential credential = MongoCredential.createCredential(user,"mclog", pass.toCharArray());

List credentials = new ArrayList();

credentials.add(credential);