java连接mongoDB

import java.net.UnknownHostException;

import com.mongodb.DB;
import com.mongodb.DBCursor;
import com.mongodb.Mongo;

public class Conn_test {
public static void main(String[] args) throws UnknownHostException{
@SuppressWarnings("deprecation")
Mongo m =new Mongo("192.168.115.24",27017); //ip与端口号
DB db = m.getDB("admin"); //要连接的数据库
if(db.authenticate("lhc","lhc".toCharArray())) //用户名与密码
System.out.println("Success");
else
System.out.println("Fail");

String tb = db.getCollectionNames().toString();
System.out.println(tb);   //打印所有表名
System.out.println(db.getCollection("system.users").findOne());//打印system.users的第一条记录
DBCursor dc = db.getCollection("ods_users_dd").find();
while(dc.hasNext()){
System.out.println(dc.next()); //输出ods_users_dd的所有记录
}
}
}