服务器连接数据库代码

import java.sql.*;

public class DatabaseConnection {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String username = "root";
        String password = "password";

        try {
            Connection connection = DriverManager.getConnection(url, username, password);
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery("SELECT * FROM mytable");

            while (resultSet.next()) {
                // 处理查询结果
                String column1 = resultSet.getString("column1");
                int column2 = resultSet.getInt("column2");
                // ...
            }

            resultSet.close();
            statement.close();
            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

from pymongo import MongoClient

# 建立与MongoDB的连接
client = MongoClient('mongodb://localhost:27017/')

# 选择数据库和集合
db = client['mydatabase']
collection = db['mycollection']

# 查询数据
result = collection.find()

for document in result:
    # 处理查询结果
    print(document)

# 关闭连接
client.close()