太棒了！

hutool-db/pom.xml

@@ -23,7 +23,8 @@
 		<tomcat-jdbc.version>10.0.14</tomcat-jdbc.version>
 		<druid.version>1.2.8</druid.version>
 		<hikariCP.version>2.4.13</hikariCP.version>
-		<mongo.version>4.5.0</mongo.version>
+		<mongo.version>3.12.10</mongo.version>
+		<mongo4.version>4.5.0</mongo4.version>
 		<sqlite.version>3.36.0.3</sqlite.version>
 		<!-- 此处固定2.5.x，支持到JDK8 -->
 		<hsqldb.version>2.5.2</hsqldb.version>
@@ -99,10 +100,16 @@
 		<!-- MongoDB Java客户端 -->
 		<dependency>
 			<groupId>org.mongodb</groupId>
-			<artifactId>mongodb-driver-sync</artifactId>
+			<artifactId>mongo-java-driver</artifactId>
 			<version>${mongo.version}</version>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>org.mongodb</groupId>
+			<artifactId>mongodb-driver-sync</artifactId>
+			<version>${mongo4.version}</version>
+			<optional>true</optional>
+		</dependency>
 		<!-- Redis Java客户端 -->
 		<dependency>
 			<groupId>redis.clients</groupId>

hutool-db/src/main/java/cn/hutool/db/nosql/mongo/MongoDS.java

@@ -6,28 +6,24 @@ import cn.hutool.core.util.StrUtil;
 import cn.hutool.db.DbRuntimeException;
 import cn.hutool.log.Log;
 import cn.hutool.setting.Setting;
-import com.mongodb.MongoClientSettings;
+import com.mongodb.MongoClient;
+import com.mongodb.MongoClientOptions;
+import com.mongodb.MongoClientOptions.Builder;
 import com.mongodb.MongoCredential;
-import com.mongodb.MongoDriverInformation;
 import com.mongodb.ServerAddress;
-import com.mongodb.client.MongoClient;
 import com.mongodb.client.MongoCollection;
 import com.mongodb.client.MongoDatabase;
-import com.mongodb.client.internal.MongoClientImpl;
-import com.mongodb.connection.ConnectionPoolSettings;
-import com.mongodb.connection.SocketSettings;
 import org.bson.Document;
 
 import java.io.Closeable;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
-import java.util.concurrent.TimeUnit;
 
 /**
  * MongoDB工具类
  *
  * @author xiaoleilu
+ *
  */
 public class MongoDS implements Closeable {
 	private final static Log log = Log.get();
@@ -150,11 +146,11 @@ public class MongoDS implements Closeable {
 
 		final MongoCredential credentail = createCredentail(group);
 		try {
-			MongoClientSettings.Builder clusterSettingsBuilder = MongoClientSettings.builder().applyToClusterSettings(b -> b.hosts(Collections.singletonList(serverAddress)));
+			if (null == credentail) {
-			if (null != credentail) {
+				mongo = new MongoClient(serverAddress, buildMongoClientOptions(group));
-				clusterSettingsBuilder.credential(credentail);
+			} else {
+				mongo = new MongoClient(serverAddress, credentail, buildMongoClientOptions(group));
 			}
-			mongo = new MongoClientImpl(clusterSettingsBuilder.build(), MongoDriverInformation.builder().build());
 		} catch (Exception e) {
 			throw new DbRuntimeException(StrUtil.format("Init MongoDB pool with connection to [{}] error!", serverAddress), e);
 		}
@@ -196,11 +192,11 @@ public class MongoDS implements Closeable {
 
 		final MongoCredential credentail = createCredentail(StrUtil.EMPTY);
 		try {
-			MongoClientSettings.Builder clusterSettingsBuilder = MongoClientSettings.builder().applyToClusterSettings(b -> b.hosts(addrList));
+			if (null == credentail) {
-			if (null != credentail) {
+				mongo = new MongoClient(addrList, buildMongoClientOptions(StrUtil.EMPTY));
-				clusterSettingsBuilder.credential(credentail);
+			} else {
+				mongo = new MongoClient(addrList, credentail, buildMongoClientOptions(StrUtil.EMPTY));
 			}
-			mongo = new MongoClientImpl(clusterSettingsBuilder.build(), MongoDriverInformation.builder().build());
 		} catch (Exception e) {
 			log.error(e, "Init MongoDB connection error!");
 			return;
@@ -252,7 +248,6 @@ public class MongoDS implements Closeable {
 	}
 
 	// --------------------------------------------------------------------------- Private method start
-
 	/**
 	 * 创建ServerAddress对象，会读取配置文件中的相关信息
 	 *
@@ -327,8 +322,8 @@ public class MongoDS implements Closeable {
 	 * @param group 分组,当分组对应的选项不存在时会读取根选项，如果也不存在使用默认值
 	 * @return MongoClientOptions
 	 */
-	private MongoClientSettings buildMongoClientOptions(String group) {
+	private MongoClientOptions buildMongoClientOptions(String group) {
-		return buildMongoClientOptions(MongoClientSettings.builder(), group).build();
+		return buildMongoClientOptions(MongoClientOptions.builder(), group).build();
 	}
 
 	/**
@@ -337,7 +332,7 @@ public class MongoDS implements Closeable {
 	 * @param group 分组，当分组对应的选项不存在时会读取根选项，如果也不存在使用默认值
 	 * @return Builder
 	 */
-	private MongoClientSettings.Builder buildMongoClientOptions(MongoClientSettings.Builder builder, String group) {
+	private Builder buildMongoClientOptions(Builder builder, String group) {
 		if (setting == null) {
 			return builder;
 		}
@@ -353,9 +348,8 @@ public class MongoDS implements Closeable {
 		if (StrUtil.isBlank(group) == false && connectionsPerHost == null) {
 			connectionsPerHost = setting.getInt("connectionsPerHost");
 		}
-		ConnectionPoolSettings.Builder connectionPoolSettingsBuilder = ConnectionPoolSettings.builder();
 		if (connectionsPerHost != null) {
-			connectionPoolSettingsBuilder.maxConnecting(connectionsPerHost);
+			builder.connectionsPerHost(connectionsPerHost);
 			log.debug("MongoDB connectionsPerHost: {}", connectionsPerHost);
 		}
 
@@ -365,10 +359,9 @@ public class MongoDS implements Closeable {
 			setting.getInt("connectTimeout");
 		}
 		if (connectTimeout != null) {
-			connectionPoolSettingsBuilder.maxWaitTime(connectTimeout, TimeUnit.MILLISECONDS);
+			builder.connectTimeout(connectTimeout);
 			log.debug("MongoDB connectTimeout: {}", connectTimeout);
 		}
-		builder.applyToConnectionPoolSettings(b -> b.applySettings(connectionPoolSettingsBuilder.build()));
 
 		// 套接字超时时间;该值会被传递给Socket.setSoTimeout(int)。默以为0（无穷） --int
 		Integer socketTimeout = setting.getInt(group + "socketTimeout");
@@ -376,8 +369,7 @@ public class MongoDS implements Closeable {
 			setting.getInt("socketTimeout");
 		}
 		if (socketTimeout != null) {
-			SocketSettings socketSettings = SocketSettings.builder().connectTimeout(socketTimeout, TimeUnit.MILLISECONDS).build();
+			builder.socketTimeout(socketTimeout);
-			builder.applyToSocketSettings(b -> b.applySettings(socketSettings));
 			log.debug("MongoDB socketTimeout: {}", socketTimeout);
 		}
 

hutool-db/src/main/java/cn/hutool/db/nosql/mongo/MongoDS4.java

@@ -0,0 +1,404 @@
+package cn.hutool.db.nosql.mongo;
+
+import cn.hutool.core.exceptions.NotInitedException;
+import cn.hutool.core.net.NetUtil;
+import cn.hutool.core.util.StrUtil;
+import cn.hutool.db.DbRuntimeException;
+import cn.hutool.log.Log;
+import cn.hutool.setting.Setting;
+import com.mongodb.MongoClientSettings;
+import com.mongodb.MongoCredential;
+import com.mongodb.MongoDriverInformation;
+import com.mongodb.ServerAddress;
+import com.mongodb.client.MongoClient;
+import com.mongodb.client.MongoCollection;
+import com.mongodb.client.MongoDatabase;
+import com.mongodb.client.internal.MongoClientImpl;
+import com.mongodb.connection.ConnectionPoolSettings;
+import com.mongodb.connection.SocketSettings;
+import org.bson.Document;
+
+import java.io.Closeable;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * MongoDB4工具类
+ *
+ * @author VampireAchao
+ */
+public class MongoDS4 implements Closeable {
+
+	private final static Log log = Log.get();
+
+	/**
+	 * 默认配置文件
+	 */
+	public final static String MONGO_CONFIG_PATH = "config/mongo.setting";
+
+	// MongoDB配置文件
+	private Setting setting;
+	// MongoDB实例连接列表
+	private String[] groups;
+	// MongoDB单点连接信息
+	private ServerAddress serverAddress;
+	// MongoDB客户端对象
+	private MongoClient mongo;
+
+	// --------------------------------------------------------------------------- Constructor start
+
+	/**
+	 * 构造MongoDB数据源<br>
+	 * 调用者必须持有MongoDS实例，否则会被垃圾回收导致写入失败！
+	 *
+	 * @param host 主机（域名或者IP）
+	 * @param port 端口
+	 */
+	public MongoDS4(String host, int port) {
+		this.serverAddress = createServerAddress(host, port);
+		initSingle();
+	}
+
+	/**
+	 * 构造MongoDB数据源<br>
+	 * 调用者必须持有MongoDS实例，否则会被垃圾回收导致写入失败！
+	 *
+	 * @param mongoSetting MongoDB的配置文件，如果是null则读取默认配置文件或者使用MongoDB默认客户端配置
+	 * @param host         主机（域名或者IP）
+	 * @param port         端口
+	 */
+	public MongoDS4(Setting mongoSetting, String host, int port) {
+		this.setting = mongoSetting;
+		this.serverAddress = createServerAddress(host, port);
+		initSingle();
+	}
+
+	/**
+	 * 构造MongoDB数据源<br>
+	 * 当提供多个数据源时，这些数据源将为一个副本集或者多个mongos<br>
+	 * 调用者必须持有MongoDS实例，否则会被垃圾回收导致写入失败！ 官方文档： http://docs.mongodb.org/manual/administration/replica-sets/
+	 *
+	 * @param groups 分组列表，当为null或空时使用无分组配置，一个分组使用单一模式，否则使用副本集模式
+	 */
+	public MongoDS4(String... groups) {
+		this.groups = groups;
+		init();
+	}
+
+	/**
+	 * 构造MongoDB数据源<br>
+	 * 当提供多个数据源时，这些数据源将为一个副本集或者mongos<br>
+	 * 调用者必须持有MongoDS实例，否则会被垃圾回收导致写入失败！<br>
+	 * 官方文档： http://docs.mongodb.org/manual/administration/replica-sets/
+	 *
+	 * @param mongoSetting MongoDB的配置文件，必须有
+	 * @param groups       分组列表，当为null或空时使用无分组配置，一个分组使用单一模式，否则使用副本集模式
+	 */
+	public MongoDS4(Setting mongoSetting, String... groups) {
+		if (mongoSetting == null) {
+			throw new DbRuntimeException("Mongo setting is null!");
+		}
+		this.setting = mongoSetting;
+		this.groups = groups;
+		init();
+	}
+	// --------------------------------------------------------------------------- Constructor end
+
+	/**
+	 * 初始化，当给定分组数大于一个时使用
+	 */
+	public void init() {
+		if (groups != null && groups.length > 1) {
+			initCloud();
+		} else {
+			initSingle();
+		}
+	}
+
+	/**
+	 * 初始化<br>
+	 * 设定文件中的host和端口有三种形式：
+	 *
+	 * <pre>
+	 * host = host:port
+	 * </pre>
+	 *
+	 * <pre>
+	 * host = host
+	 * port = port
+	 * </pre>
+	 *
+	 * <pre>
+	 * host = host
+	 * </pre>
+	 */
+	synchronized public void initSingle() {
+		if (setting == null) {
+			try {
+				setting = new Setting(MONGO_CONFIG_PATH, true);
+			} catch (Exception e) {
+				// 在single模式下，可以没有配置文件。
+			}
+		}
+
+		String group = StrUtil.EMPTY;
+		if (null == this.serverAddress) {
+			//存在唯一分组
+			if (groups != null && groups.length == 1) {
+				group = groups[0];
+			}
+			serverAddress = createServerAddress(group);
+		}
+
+		final MongoCredential credentail = createCredentail(group);
+		try {
+			MongoClientSettings.Builder clusterSettingsBuilder = MongoClientSettings.builder().applyToClusterSettings(b -> b.hosts(Collections.singletonList(serverAddress)));
+			if (null != credentail) {
+				clusterSettingsBuilder.credential(credentail);
+			}
+			mongo = new MongoClientImpl(clusterSettingsBuilder.build(), MongoDriverInformation.builder().build());
+		} catch (Exception e) {
+			throw new DbRuntimeException(StrUtil.format("Init MongoDB pool with connection to [{}] error!", serverAddress), e);
+		}
+
+		log.info("Init MongoDB pool with connection to [{}]", serverAddress);
+	}
+
+	/**
+	 * 初始化集群<br>
+	 * 集群的其它客户端设定参数使用全局设定<br>
+	 * 集群中每一个实例成员用一个group表示，例如：
+	 *
+	 * <pre>
+	 * user = test1
+	 * pass = 123456
+	 * database = test
+	 * [db0]
+	 * host = 192.168.1.1:27117
+	 * [db1]
+	 * host = 192.168.1.1:27118
+	 * [db2]
+	 * host = 192.168.1.1:27119
+	 * </pre>
+	 */
+	synchronized public void initCloud() {
+		if (groups == null || groups.length == 0) {
+			throw new DbRuntimeException("Please give replication set groups!");
+		}
+
+		if (setting == null) {
+			// 若未指定配置文件，则使用默认配置文件
+			setting = new Setting(MONGO_CONFIG_PATH, true);
+		}
+
+		final List<ServerAddress> addrList = new ArrayList<>();
+		for (String group : groups) {
+			addrList.add(createServerAddress(group));
+		}
+
+		final MongoCredential credentail = createCredentail(StrUtil.EMPTY);
+		try {
+			MongoClientSettings.Builder clusterSettingsBuilder = MongoClientSettings.builder().applyToClusterSettings(b -> b.hosts(addrList));
+			if (null != credentail) {
+				clusterSettingsBuilder.credential(credentail);
+			}
+			mongo = new MongoClientImpl(clusterSettingsBuilder.build(), MongoDriverInformation.builder().build());
+		} catch (Exception e) {
+			log.error(e, "Init MongoDB connection error!");
+			return;
+		}
+
+		log.info("Init MongoDB cloud Set pool with connection to {}", addrList);
+	}
+
+	/**
+	 * 设定MongoDB配置文件
+	 *
+	 * @param setting 配置文件
+	 */
+	public void setSetting(Setting setting) {
+		this.setting = setting;
+	}
+
+	/**
+	 * @return 获得MongoDB客户端对象
+	 */
+	public MongoClient getMongo() {
+		return mongo;
+	}
+
+	/**
+	 * 获得DB
+	 *
+	 * @param dbName DB
+	 * @return DB
+	 */
+	public MongoDatabase getDb(String dbName) {
+		return mongo.getDatabase(dbName);
+	}
+
+	/**
+	 * 获得MongoDB中指定集合对象
+	 *
+	 * @param dbName         库名
+	 * @param collectionName 集合名
+	 * @return DBCollection
+	 */
+	public MongoCollection<Document> getCollection(String dbName, String collectionName) {
+		return getDb(dbName).getCollection(collectionName);
+	}
+
+	@Override
+	public void close() {
+		mongo.close();
+	}
+
+	// --------------------------------------------------------------------------- Private method start
+
+	/**
+	 * 创建ServerAddress对象，会读取配置文件中的相关信息
+	 *
+	 * @param group 分组，如果为{@code null}或者""默认为无分组
+	 * @return ServerAddress
+	 */
+	private ServerAddress createServerAddress(String group) {
+		final Setting setting = checkSetting();
+
+		if (group == null) {
+			group = StrUtil.EMPTY;
+		}
+
+		final String tmpHost = setting.getByGroup("host", group);
+		if (StrUtil.isBlank(tmpHost)) {
+			throw new NotInitedException("Host name is empy of group: {}", group);
+		}
+
+		final int defaultPort = setting.getInt("port", group, 27017);
+		return new ServerAddress(NetUtil.buildInetSocketAddress(tmpHost, defaultPort));
+	}
+
+	/**
+	 * 创建ServerAddress对象
+	 *
+	 * @param host 主机域名或者IP（如果为空默认127.0.0.1）
+	 * @param port 端口（如果为空默认为）
+	 * @return ServerAddress
+	 */
+	private ServerAddress createServerAddress(String host, int port) {
+		return new ServerAddress(host, port);
+	}
+
+	/**
+	 * 创建{@link MongoCredential}，用于服务端验证<br>
+	 * 此方法会首先读取指定分组下的属性，用户没有定义则读取空分组下的属性
+	 *
+	 * @param group 分组
+	 * @return {@link MongoCredential}，如果用户未指定用户名密码返回null
+	 * @since 4.1.20
+	 */
+	private MongoCredential createCredentail(String group) {
+		final Setting setting = this.setting;
+		if (null == setting) {
+			return null;
+		}
+		final String user = setting.getStr("user", group, setting.getStr("user"));
+		final String pass = setting.getStr("pass", group, setting.getStr("pass"));
+		final String database = setting.getStr("database", group, setting.getStr("database"));
+		return createCredentail(user, database, pass);
+	}
+
+	/**
+	 * 创建{@link MongoCredential}，用于服务端验证
+	 *
+	 * @param userName 用户名
+	 * @param database 数据库名
+	 * @param password 密码
+	 * @return {@link MongoCredential}
+	 * @since 4.1.20
+	 */
+	private MongoCredential createCredentail(String userName, String database, String password) {
+		if (StrUtil.hasEmpty(userName, database, database)) {
+			return null;
+		}
+		return MongoCredential.createCredential(userName, database, password.toCharArray());
+	}
+
+	/**
+	 * 构件MongoDB连接选项<br>
+	 *
+	 * @param group 分组,当分组对应的选项不存在时会读取根选项，如果也不存在使用默认值
+	 * @return MongoClientOptions
+	 */
+	private MongoClientSettings buildMongoClientOptions(String group) {
+		return buildMongoClientOptions(MongoClientSettings.builder(), group).build();
+	}
+
+	/**
+	 * 构件MongoDB连接选项<br>
+	 *
+	 * @param group 分组，当分组对应的选项不存在时会读取根选项，如果也不存在使用默认值
+	 * @return Builder
+	 */
+	private MongoClientSettings.Builder buildMongoClientOptions(MongoClientSettings.Builder builder, String group) {
+		if (setting == null) {
+			return builder;
+		}
+
+		if (StrUtil.isEmpty(group)) {
+			group = StrUtil.EMPTY;
+		} else {
+			group = group + StrUtil.DOT;
+		}
+
+		// 每个主机答应的连接数（每个主机的连接池大小），当连接池被用光时，会被阻塞住
+		Integer connectionsPerHost = setting.getInt(group + "connectionsPerHost");
+		if (StrUtil.isBlank(group) == false && connectionsPerHost == null) {
+			connectionsPerHost = setting.getInt("connectionsPerHost");
+		}
+		ConnectionPoolSettings.Builder connectionPoolSettingsBuilder = ConnectionPoolSettings.builder();
+		if (connectionsPerHost != null) {
+			connectionPoolSettingsBuilder.maxSize(connectionsPerHost);
+			log.debug("MongoDB connectionsPerHost: {}", connectionsPerHost);
+		}
+
+		// 被阻塞线程从连接池获取连接的最长等待时间（ms） --int
+		Integer connectTimeout = setting.getInt(group + "connectTimeout");
+		if (StrUtil.isBlank(group) == false && connectTimeout == null) {
+			setting.getInt("connectTimeout");
+		}
+		if (connectTimeout != null) {
+			connectionPoolSettingsBuilder.maxWaitTime(connectTimeout, TimeUnit.MILLISECONDS);
+			log.debug("MongoDB connectTimeout: {}", connectTimeout);
+		}
+		builder.applyToConnectionPoolSettings(b -> b.applySettings(connectionPoolSettingsBuilder.build()));
+
+		// 套接字超时时间;该值会被传递给Socket.setSoTimeout(int)。默以为0（无穷） --int
+		Integer socketTimeout = setting.getInt(group + "socketTimeout");
+		if (StrUtil.isBlank(group) == false && socketTimeout == null) {
+			setting.getInt("socketTimeout");
+		}
+		if (socketTimeout != null) {
+			SocketSettings socketSettings = SocketSettings.builder().connectTimeout(socketTimeout, TimeUnit.MILLISECONDS).build();
+			builder.applyToSocketSettings(b -> b.applySettings(socketSettings));
+			log.debug("MongoDB socketTimeout: {}", socketTimeout);
+		}
+
+		return builder;
+	}
+
+	/**
+	 * 检查Setting配置文件
+	 *
+	 * @return Setting配置文件
+	 */
+	private Setting checkSetting() {
+		if (null == this.setting) {
+			throw new DbRuntimeException("Please indicate setting file or create default [{}]", MONGO_CONFIG_PATH);
+		}
+		return this.setting;
+	}
+	// --------------------------------------------------------------------------- Private method end
+
+}

hutool-db/src/main/java/cn/hutool/db/nosql/mongo/MongoFactory4.java

@@ -0,0 +1,120 @@
+package cn.hutool.db.nosql.mongo;
+
+import cn.hutool.core.map.MapUtil;
+import cn.hutool.core.util.ArrayUtil;
+import cn.hutool.core.util.RuntimeUtil;
+import cn.hutool.setting.Setting;
+
+import java.util.Collection;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * MongoDB4工厂类，用于创建
+ * @author VampireAchao
+ */
+public class MongoFactory4 {
+
+	/** 各分组做组合key的时候分隔符 */
+	private final static String GROUP_SEPRATER = ",";
+
+	/** 数据源池 */
+	private static final Map<String, MongoDS4> DS_MAP = new ConcurrentHashMap<>();
+
+	// JVM关闭前关闭MongoDB连接
+	static {
+		RuntimeUtil.addShutdownHook(MongoFactory4::closeAll);
+	}
+
+	// ------------------------------------------------------------------------ Get DS start
+	/**
+	 * 获取MongoDB数据源<br>
+	 *
+	 * @param host 主机
+	 * @param port 端口
+	 * @return MongoDB连接
+	 */
+	public static MongoDS4 getDS(String host, int port) {
+		final String key = host + ":" + port;
+		MongoDS4 ds = DS_MAP.get(key);
+		if (null == ds) {
+			// 没有在池中加入之
+			ds = new MongoDS4(host, port);
+			DS_MAP.put(key, ds);
+		}
+
+		return ds;
+	}
+
+	/**
+	 * 获取MongoDB数据源<br>
+	 * 多个分组名对应的连接组成集群
+	 *
+	 * @param groups 分组列表
+	 * @return MongoDB连接
+	 */
+	public static MongoDS4 getDS(String... groups) {
+		final String key = ArrayUtil.join(groups, GROUP_SEPRATER);
+		MongoDS4 ds = DS_MAP.get(key);
+		if (null == ds) {
+			// 没有在池中加入之
+			ds = new MongoDS4(groups);
+			DS_MAP.put(key, ds);
+		}
+
+		return ds;
+	}
+
+	/**
+	 * 获取MongoDB数据源<br>
+	 *
+	 * @param groups 分组列表
+	 * @return MongoDB连接
+	 */
+	public static MongoDS4 getDS(Collection<String> groups) {
+		return getDS(groups.toArray(new String[0]));
+	}
+
+	/**
+	 * 获取MongoDB数据源<br>
+	 *
+	 * @param setting 设定文件
+	 * @param groups 分组列表
+	 * @return MongoDB连接
+	 */
+	public static MongoDS4 getDS(Setting setting, String... groups) {
+		final String key = setting.getSettingPath() + GROUP_SEPRATER + ArrayUtil.join(groups, GROUP_SEPRATER);
+		MongoDS4 ds = DS_MAP.get(key);
+		if (null == ds) {
+			// 没有在池中加入之
+			ds = new MongoDS4(setting, groups);
+			DS_MAP.put(key, ds);
+		}
+
+		return ds;
+	}
+
+	/**
+	 * 获取MongoDB数据源<br>
+	 *
+	 * @param setting 配置文件
+	 * @param groups 分组列表
+	 * @return MongoDB连接
+	 */
+	public static MongoDS4 getDS(Setting setting, Collection<String> groups) {
+		return getDS(setting, groups.toArray(new String[0]));
+	}
+	// ------------------------------------------------------------------------ Get DS ends
+
+	/**
+	 * 关闭全部连接
+	 */
+	public static void closeAll() {
+		if(MapUtil.isNotEmpty(DS_MAP)){
+			for(MongoDS4 ds : DS_MAP.values()) {
+				ds.close();
+			}
+			DS_MAP.clear();
+		}
+	}
+}

hutool-db/src/test/java/cn/hutool/db/nosql/MongoDBTest.java

@@ -1,6 +1,6 @@
 package cn.hutool.db.nosql;
 
-import cn.hutool.db.nosql.mongo.MongoFactory;
+import cn.hutool.db.nosql.mongo.MongoFactory4;
 import com.mongodb.client.MongoDatabase;
 import org.junit.Assert;
 import org.junit.Ignore;
@@ -14,7 +14,7 @@ public class MongoDBTest {
 	@Test
 	@Ignore
 	public void redisDSTest() {
-		MongoDatabase db = MongoFactory.getDS("master").getDb("test");
+		MongoDatabase db = MongoFactory4.getDS("master").getDb("test");
 		Assert.assertEquals("test", db.getName());
 	}
 }