云数据库MongoDB版完全兼容MongoDB协议,本文为您介绍使用不同语言的程序代码来连接MongoDB单节点实例。

前提条件

  • 获取云数据库MongoDB副本集实例连接地址。具体操作,请参见副本集实例连接说明
  • 根据您使用的语言下载并安装官方驱动程序。更多信息,请参见MongoDB Drivers

Node.js连接示例

Node.js驱动相关信息,请参见MongoDB Node.js Driver

  1. 在客户端执行如下命令,进行项目初始化。
    mkdir node-mongodb-demo
    cd node-mongodb-demo
    npm init
  2. 执行如下命令,安装驱动包以及工具包。
    npm install mongodb node-uuid sprintf-js
  3. 获取云数据库MongoDB单节点实例连接信息。
  4. Node.js Demo Code。
    const sprintf = require("sprintf-js").sprintf;
    const MongoClient = require('mongodb').MongoClient;
    const host1 = "dds-**********.mongodb.rds.aliyuncs.com";
    const port1 = 3717;
    const host2 = "dds-**********.mongodb.rds.aliyuncs.com";
    const port2 = 3717;
    const username = "root";
    const password = "*********";
    const replSetName = "mgset-*********";
    const demoDb = "test";
    const demoColl = "testColl";
    // 官方建议使用副本集地址,确保高可用。
    const url = sprintf("mongodb://%s:%s@%s:%d,%s:%d/admin?replicaSet=%s",
            username, password, host1, port1, host2, port2, replSetName);
    console.info("url:", url);
    const client = new MongoClient(url);
    // 获取mongoClient。
    async function run() {
        try {
            // 连接实例。
            await client.connect();
            // 取得数据库句柄。
            const database = client.db(demoDb);
            // 取得Collection句柄。
            const collection = database.collection(demoColl);
            const demoName = "Node For Demo";
            const doc = { "DEMO": demoName, "MESG": "Hello AliCoudDB For MongoDB" };
            console.info("ready insert document: ", doc);
            // 插入数据。
            const result = await collection.insertOne(doc);
            console.log(
                `A document was inserted with the _id: ${result.insertedId}`,
            );
            // 读取数据。
            const filter = { "DEMO": demoName };
            const findResult = await collection.find(filter);
            await findResult.forEach(console.dir);
          } finally {
              // 关闭连接。
              await client.close();
          }
    }
    run().catch(console.dir);

PHP连接示例

PHP相关信息,请参见MongoDB PHP Driver

  1. 安装驱动包以及工具包。
    $ pecl install mongodb
    $ echo "extension=mongodb.so" >> `php --ini | grep "Loaded Configuration" | sed -e "s|.*:\s*||"`
    $ composer require "mongodb/mongodb=^1.0.0"
  2. 获取云数据库MongoDB单节点实例连接信息。
  3. PHP Demo Code。
    <?php
    require 'vendor/autoload.php'; // include Composer goodies
    # 实例信息。
    $demo_seed1 = '**********.mongodb.test.aliyun-inc.com:3717';
    $demo_seed2 = '**********.mongodb.test.aliyun-inc.com:3717';
    $demo_replname = "mgset-**********";
    $demo_user = 'root';
    $demo_password = '**********';
    $demo_db = 'admin';
    # 根据实例信息构造mongodb connection string。
    # mongodb://[username:password@]host1[:port1][,host2[:port2],...[,hostN[:portN]]][/[database][?options]]
    $demo_uri = 'mongodb://' . $demo_user . ':' . $demo_password . '@' .
        $demo_seed1 . ',' . $demo_seed2 . '/' . $demo_db . '?replicaSet=' . $demo_replname;
    $client = new MongoDB\Client($demo_uri);
    $collection = $client->testDb->testColl;
    $result = $collection->insertOne(['name' => 'ApsaraDB for Mongodb', 'desc' => 'Hello, Mongodb']);
    echo "Inserted with Object ID '{$result->getInsertedId()}'", "\n";
    $result = $collection->find(['name' => 'ApsaraDB for Mongodb']);
    foreach ($result as $entry) {
        echo $entry->_id, ': ', $entry->name, "\n";
    }
    ?>

Java连接示例

相关链接:
  1. 获取云数据库MongoDB单节点实例连接信息。
  2. Java Demo Code。
    • Maven配置。
      <dependencies>
          <dependency>
              <groupId>org.mongodb</groupId>
              <artifactId>mongo-java-driver</artifactId>
              <version>4.1.0</version>
          </dependency>
      </dependencies>
    • Java Code。
      import java.util.ArrayList;
      import java.util.List;
      import java.util.UUID;
      import org.bson.BsonDocument;
      import org.bson.BsonString;
      import org.bson.Document;
      import com.mongodb.MongoClient;
      import com.mongodb.MongoClientOptions;
      import com.mongodb.MongoClientURI;
      import com.mongodb.MongoCredential;
      import com.mongodb.ServerAddress;
      import com.mongodb.client.MongoCollection;
      import com.mongodb.client.MongoCursor;
      import com.mongodb.client.MongoDatabase;
       public class Main {
              public static ServerAddress seed1 = new ServerAddress("**********.mongodb.tbc3.newtest.rdstest.aliyun-inc.com",
                              27017);
              public static ServerAddress seed2 = new ServerAddress("**********.mongodb.tbc3.newtest.rdstest.aliyun-inc.com",
                              27017);
              public static String username = "demouser";
              public static String password = "**********";
              public static String ReplSetName = "mgset-**********";
              public static String DEFAULT_DB = "admin";
              public static String DEMO_DB = "test";
              public static String DEMO_COLL = "testColl";
               public static MongoClient createMongoDBClient() {
                      // 构建Seed列表。
                      List<ServerAddress> seedList = new ArrayList<ServerAddress>();
                      seedList.add(seed1);
                      seedList.add(seed2);
                      // 构建鉴权信息。
                      List<MongoCredential> credentials = new ArrayList<MongoCredential>();
                      credentials.add(MongoCredential.createScramSha1Credential(username, DEFAULT_DB,
                                      password.toCharArray()));
                      // 构建操作选项,requiredReplicaSetName属性外的选项根据自己的实际需求配置,默认参数满足大多数场景。
                      MongoClientOptions options = MongoClientOptions.builder().requiredReplicaSetName(ReplSetName)
                                      .socketTimeout(2000).connectionsPerHost(1).build();
                      return new MongoClient(seedList, credentials, options);
              }
               public static MongoClient createMongoDBClientWithURI() {
                      // 另一种通过URI初始化。
                      // mongodb://[username:password@]host1[:port1][,host2[:port2],...[,hostN[:portN]]][/[database][?options]]
                      MongoClientURI connectionString = new MongoClientURI("mongodb://" + username + ":" + password + "@"
                                      + seed1 + "," + seed2 + "/" + DEFAULT_DB + "?replicaSet=" + ReplSetName);
                      return new MongoClient(connectionString);
              }
               public static void main(String args[]) {
                      MongoClient client = createMongoDBClient();
                      // or
                      // MongoClient client = createMongoDBClientWithURI();
                      try {
                              // 取得Collection句柄。
                              MongoDatabase database = client.getDatabase(DEMO_DB);
                              MongoCollection<Document> collection = database.getCollection(DEMO_COLL);
                              // 插入数据。
                              Document doc = new Document();
                              String demoname = "JAVA:" + UUID.randomUUID();
                              doc.append("DEMO", demoname);
                              doc.append("MESG", "Hello AliCoudDB For MongoDB");
                              collection.insertOne(doc);
                              System.out.println("insert document: " + doc);
                              // 读取数据。
                              BsonDocument filter = new BsonDocument();
                              filter.append("DEMO", new BsonString(demoname));
                              MongoCursor<Document> cursor = collection.find(filter).iterator();
                              while (cursor.hasNext()) {
                                      System.out.println("find document: " + cursor.next());
                              }
                      } finally {
                              // 关闭Client,释放资源。
                              client.close();
                      }
                      return;
              }
      }

Python连接示例

相关文档: pymongo 4.1.1

  1. 安装pymongo。
    pip3 install pymongo
  2. 获取云数据库MongoDB单节点实例连接信息。
  3. Python Demo Code。
    import sys
    from pymongo import MongoClient
    uri = 'mongodb://%s:%s@dds-bp18365e467ea5c4****.mongodb.rds.aliyuncs.com:3717/admin'
    username = 'root'
    password = 'MongoDB****'
    client = MongoClient(uri % (username, password))
    ret = client.admin.command('ping')['ok']
    if ret:
        print('ping successfully!')
    else:
        print('ping failed!')
        sys.exit(1)
    
    db = client['baz']
    coll = db['quz']
    uuid = coll.insert_one({'hello': 'world'}).inserted_id
    print('Id: %s' % uuid)
    ret = coll.find_one({"_id": uuid})
    print(ret)

C#连接示例

C#驱动相关信息,请参见MongoDB C# Driver

  1. 在客户端执行如下命令,安装如下驱动包。
    Install-Package mongocsharpdriver
  2. 获取云数据库MongoDB单节点实例连接信息。
  3. C# Demo Code。
    using MongoDB.Driver;
    using System;
    using System.Collections.Generic;
    
    namespace Aliyun
    {
        class Program
        {
            static void Main(string[] args)
            {
                //Mongo 实例信息。
                const string host1 = "dds-t4n**************.mongodb.singapore.rds.aliyuncs.com";
                const int port1 = 3717;
                const string host2 = "dds-t4n**************.mongodb.singapore.rds.aliyuncs.com";
                const int port2 = 3717;
                const string replicaSetName = "mgset-300******";
                const string admin = "admin";
                const string userName = "root";
                const string passwd = "********";
    
                try
                {
                    Console.WriteLine("开始连接.......");
                    MongoClientSettings settings = new MongoClientSettings();
                    List<MongoServerAddress> servers = new List<MongoServerAddress>();
                    servers.Add(new MongoServerAddress(host1, port1));
                    servers.Add(new MongoServerAddress(host2, port2));
                    settings.Servers = servers;
                    //设置副本集名称。
                    settings.ReplicaSetName = replicaSetName;
                    //设置超时时间为3秒。
                    settings.ConnectTimeout = new TimeSpan(0, 0, 0, 3, 0);
                    MongoCredential credentials = MongoCredential.CreateCredential(admin, userName, passwd);
                    settings.Credential = credentials;
                    MongoClient client = new MongoClient(settings);
                    var server = client.GetServer();
                    MongoDatabase database = server.GetDatabase("test");
                    var collection = database.GetCollection<User>("test_collection");
                    User user = new User();
                    user.id = "1";
                    user.name = "mongo_test";
                    user.sex = "女";
                    //插入数据user。
                    collection.Insert(user);
                    //获取一条数据。
                    User result = collection.FindOne();
                    Console.WriteLine("id:" + result.id + " name:" + result.name + " sex:"+result.sex);
                    Console.WriteLine("连接成功.........");
                }
                catch (Exception e)
                {
                    Console.WriteLine("连接异常:"+e.Message);
    
                }
            }
        }
        class User
        {
            public string id { set; get; }
            public string name { set; get; }
            public string sex { set; get; }
    
        }
    }

Go连接示例

Go驱动相关信息,请参见MongoDB Go Driver

  1. 安装如下驱动包。
    go get go.mongodb.org/mongo-driver
  2. 获取云数据库MongoDB单节点实例连接信息。
  3. Go Demo Code。
    package main
    
    import (
        "context"
        "fmt"
        "go.mongodb.org/mongo-driver/bson"
        "go.mongodb.org/mongo-driver/mongo"
        "go.mongodb.org/mongo-driver/mongo/options"
        "go.mongodb.org/mongo-driver/mongo/readconcern"
        "log"
    )
    
    func main() {
        // Create a Client to a MongoDB server and use Ping to verify that the
        // server is running.
    
        clientOpts := options.Client().ApplyURI("mongodb://root:****@dds-bp1*******.mongodb.rds.aliyuncs.com:3717/admin")
        client, err := mongo.Connect(context.TODO(), clientOpts)
        if err != nil {
            fmt.Println("connect failed!")
            log.Fatal(err)
            return
        }
        fmt.Println("connect successful!")
    
        defer func() {
            if err = client.Disconnect(context.TODO()); err != nil {
                fmt.Println("disconnect failed!")
                log.Fatal(err)
            }
            fmt.Println("disconnect successful!")
        }()
    
        // Call Ping to verify that the deployment is up and the Client was
        // configured successfully. As mentioned in the Ping documentation, this
        // reduces application resiliency as the server may be temporarily
        // unavailable when Ping is called.
        if err = client.Ping(context.TODO(), nil); err != nil {
            fmt.Println("ping failed!")
            log.Fatal(err)
            return
        }
        fmt.Println("ping successful!")
    
        // Specify the DefaultReadConcern option so any transactions started through
        // the session will have read concern majority.
        // The DefaultReadPreference and DefaultWriteConcern options aren't
        // specified so they will be inherited from client and be set to primary
        // and majority, respectively.
        opts := options.Session().SetDefaultReadConcern(readconcern.Majority())
        sess, err := client.StartSession(opts)
        if err != nil {
            fmt.Println("start session failed!")
            log.Fatal(err)
            return
        }
        defer func() {
            sess.EndSession(context.TODO())
            fmt.Println("end session!")
        }()
        fmt.Println("start session successful!")
    
        txnOpts := options.Transaction()
        result, err := sess.WithTransaction(
            context.TODO(),
            func(sessCtx mongo.SessionContext) (interface{}, error) {
                collection := client.Database("baz").Collection("qux")
                res, err := collection.InsertOne(context.Background(), bson.M{"hello": "world"})
                if err != nil {
                    fmt.Println("insert result failed!")
                    log.Fatal(err)
                    return nil, err
                }
                id := res.InsertedID
                fmt.Println("Id: ", id)
                fmt.Printf("insert result: %v\n", res)
    
                result := bson.M{}
                filter := bson.D{{"_id", res.InsertedID}}
                if err := collection.FindOne(context.Background(), filter).Decode(&result); err != nil {
                    fmt.Println("find failed!")
                    log.Fatal(err)
                    return nil, err
                }
                return result, err
            },
            txnOpts)
        if err == nil {
            fmt.Printf("result: %v\n", result)
        }
    }