原文出自：http://www.mkyong.com/mongodb/java-authentication-access-to-mongodb/
返回目录：http://ysj5125094.iteye.com/blog/2192754
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。
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
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")
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。
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If MongoDB is started in secure mode, below “insert” operation is no longer valid, and prompts “need to login” error message.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);
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)
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。
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();
}
}
}