java 连接mongodb

import com.mongodb.MongoClient;
import com.mongodb.MongoClientOptions;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;

public class MongoDBAuthExample {
public static void main(String[] args) {
// 设置MongoDB服务器地址
ServerAddress serverAddress = new ServerAddress("localhost", 27017);

// 设置认证凭证
MongoCredential credential = MongoCredential.createCredential(
"username", "database", "password".toCharArray());

// 设置认证选项
MongoClientOptions options = MongoClientOptions.builder()
.credential(credential)
.build();

// 创建MongoClient
MongoClient mongoClient = new MongoClient(serverAddress, options);

// 连接到数据库
// ...

// 关闭连接
mongoClient.close();
}
}

=================================

import com.mongodb.*;
import com.mongodb.client.MongoClient;
import com.mongodb.client.MongoClients;
import com.mongodb.client.MongoDatabase;

import java.util.Arrays;

public class MongoDBClusterAuthExample {
public static void main(String[] args) {
// 设置MongoDB集群服务器地址
MongoClientSettings settings = MongoClientSettings.builder()
.applyToClusterSettings(builder ->
builder.hosts(Arrays.asList(
new ServerAddress("host1", 27017),
new ServerAddress("host2", 27017),
new ServerAddress("host3", 27017))))
.credential(MongoCredential.createCredential(
"username", "database", "password".toCharArray()))
.build();

// 创建MongoClient
MongoClient mongoClient = MongoClients.create(settings);

// 连接到数据库
MongoDatabase database = mongoClient.getDatabase("database");

// 执行数据库操作
// ...

// 关闭连接
mongoClient.close();
}
}