Java mongo db身份验证失败

Question

嗨，我正在做一些关于java和mongoDB的实验。我已经成功安装了mongoDB并能够通过命令行进行连接。但是，当我尝试通过java连接，然后它给我错误的身份验证。我试着在下列方式：

nilkash@nilkash-Inspiron-5559:~$ mongo -u admin -p admin123 --authenticationDatabase admin 
MongoDB shell version: 3.2.9 
connecting to: test 
Server has startup warnings: 
2016-09-17T16:29:31.090+0530 I CONTROL [initandlisten] 
2016-09-17T16:29:31.090+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'. 
2016-09-17T16:29:31.090+0530 I CONTROL [initandlisten] **  We suggest setting it to 'never' 
2016-09-17T16:29:31.090+0530 I CONTROL [initandlisten] 
2016-09-17T16:29:31.090+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'. 
2016-09-17T16:29:31.090+0530 I CONTROL [initandlisten] **  We suggest setting it to 'never' 
2016-09-17T16:29:31.090+0530 I CONTROL [initandlisten] 
> 

，并通过java代码：

package mongo; 

import java.net.UnknownHostException; 
import java.util.Date; 
import com.mongodb.BasicDBObject; 
import com.mongodb.DB; 
import com.mongodb.DBCollection; 
import com.mongodb.DBCursor; 
import com.mongodb.Mongo; 
import com.mongodb.MongoClient; 
import com.mongodb.MongoException; 

/** 
* Java + MongoDB Hello world Example 
* 
*/ 
public class App { 
    public static void main(String[] args) { 

    try { 

     Mongo mongo = new Mongo("localhost", 27017); 
     DB db = mongo.getDB("testdb"); 

     boolean auth = db.authenticate("admin", "admin123".toCharArray()); 

    if (auth) { 

     System.out.println("Login is successful!"); 
    } else { 
     System.out.println("Login is failed!"); 
    } 
    System.out.println("Done"); 


    } catch (UnknownHostException e) { 
    e.printStackTrace(); 
    } catch (MongoException e) { 
    e.printStackTrace(); 
    } 

    } 
} 

，并得到了它的结果：

Login is failed! 
Done 

这有什么错？需要一些帮助。谢谢。

Answer 1

mongo -u admin -p admin123 --authenticationDatabase admin 

当您尝试使用mongo shell登录时，您正在向db admin进行身份验证。但是，在代码中它看起来像你试图用分贝TESTDB

DB db = mongo.getDB("testdb"); 

评估您的登录凭据它应该是在两地相同的。

Answer 2

在最新版本的MongoDB 3.2中，默认的认证机制是“SCRAM-SHA-1”。有一个单独的类可用于此身份验证。我会建议使用这种最新的方法。

欲了解更多信息，请参阅此link。下面

例子： -

只是数据库名称，用户名，密码，因此在下面的代码。它应该适合你。

public static void main(String[] args) { 

MongoClient mongoClient = null; 
     MongoCredential mongoCredential = MongoCredential.createScramSha1Credential("admin", "admin", 
       "admin123".toCharArray()); 

     mongoClient = new MongoClient(new ServerAddress("localhost", 27017), Arrays.asList(mongoCredential)); 

     DB db = mongoClient.getDB("testdb"); 

     System.out.println(db.getStats()); 
     System.out.println(db.getCollectionNames()); 

     mongoClient.close(); 
    } 

相关性： -

<dependency> 
    <groupId>org.mongodb</groupId> 
    <artifactId>mongo-java-driver</artifactId> 
    <version>3.2.2</version> 
</dependency> 

用户创建： -

use admin; 

db.createUser({ user : "admin", pwd : "admin123", roles : ["dbAdmin"]}); 

要检查用户的详细信息： -

use admin; 

db.getUsers();