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原文出自：http://www.mkyong.com/mongodb/java-authentication-access-to-mongodb/

返回目录：http://ysj5125094.iteye.com/blog/2192754?

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Java MongoDB : Authentication example

By default, MongoDB is run in trust environment (authentication with a username and password is NOT required). In this tutorial, we will show you how to start MongoDB in secure mode / enable authentication, and connect with the Java MongoDB driver.

译：默认情况下，MongoDB 运行在一个信任的环境里（是不需要用户名和密码认证的）。在本教程中，我们将向你展示如何在安全模式下启动MongoDB?/?启用身份验证，并通过Java程序连接MongoDB。

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1. Start MongoDB in Secure Mode

Start MongoDB with?--auth?option, now, MongoDB need username and password to perform any database / collection operations.

译：启动MongoDB -- auth?选项，现在，MongoDB需要用户名和密码才能执行任何database/collection 操作。

mongod --auth

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Later, we need to connect to the database “testdb”, so add a user for testing later.

译：接下来，我们需要连接数据库"testdb"，所以添加一个测试用户。

> use admin
> db.addUser("admin","password")
> use testdb
> db.addUser("mkyong","password")

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To enable MongoDB authentication, you must first add a user to the special “admin” database, please refer to this?MongoDB authentication example?for detail guide.?

译：使MongoDB的认证，你必须首先添加一个特殊的用户“admin”，请参阅此MongoDB实例验证详细指南。

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2. Java + MongoDB Authentication example

If MongoDB is started in secure mode, below “insert” operation is no longer valid, and prompts “need to login” error message.

译：如果MongoDB已经运行在安全模块中，那么"insert"操作不再有效，并提示"需要登录"错误消息。

	Mongo mongo = new Mongo("localhost", 27017);
	DB db = mongo.getDB("testdb");
 
	DBCollection table = db.getCollection("user");
 
	BasicDBObject document = new BasicDBObject();
	document.put("name", "mkyong");
	table.insert(document);

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com.mongodb.CommandResult$CommandFailure: command failed [getlasterror]: 
	{ "serverUsed" : "localhost/127.0.0.1:27017" , "errmsg" : "need to login" , "ok" : 0.0}
 
	at com.mongodb.CommandResult.getException(CommandResult.java:88)
	at com.mongodb.CommandResult.throwOnError(CommandResult.java:134)
	at com.mongodb.DBTCPConnector._checkWriteError(DBTCPConnector.java:142)
	at com.mongodb.DBTCPConnector.say(DBTCPConnector.java:183)
	at com.mongodb.DBTCPConnector.say(DBTCPConnector.java:155)
	at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:270)
	at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:226)
	at com.mongodb.DBCollection.insert(DBCollection.java:75)
	at com.mongodb.DBCollection.insert(DBCollection.java:59)
	at com.mongodb.DBCollection.insert(DBCollection.java:104)
	at com.mkyong.core.App.main(App.java:40)

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Now, using?db.authenticate()?to perform the authentication, a return value of true = success, false = fail.

译：现在，使用db.authenticate()进认证，会得到一个返回值 true = 成功， false = 失败。

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package com.mkyong.core;
 
import java.net.UnknownHostException;
import java.util.Date;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.Mongo;
import com.mongodb.MongoException;
 
/**
 * Java + MongoDB in Secure Mode
 * 
 */
public class JavaMongoDBAuthExample {
   public static void main(String[] args) {
 
    try {
 
	Mongo mongo = new Mongo("localhost", 27017);
	DB db = mongo.getDB("testdb");
 
	boolean auth = db.authenticate("testdb", "password".toCharArray());
	if (auth) {
 
		DBCollection table = db.getCollection("user");
 
		BasicDBObject document = new BasicDBObject();
		document.put("name", "mkyong");
		table.insert(document);
 
		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();
    }
  }
}

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References

1. Java MongoDB authentication example
2. JIRA – DB.authenticate() should use a char[] for the password
3. MongoDB Java Authentication example
4. MongoDB Security Practices and Management

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Java MongoDB : Authentication 例子（译）

原文：http://ysj5125094.iteye.com/blog/2211122