如何通过jdbc运行sql的declare语句？

import java.sql.*;

public class JdbcDeclareExample {
    public static void main(String[] args) {
        Connection connection = null;
        Statement statement = null;
        
        try {
            // 1. 导入JDBC相关的类库
            // ...

            // 2. 建立数据库连接
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");

            // 3. 创建Statement对象
            statement = connection.createStatement();

            // 4. 执行DECLARE语句
            statement.execute("DECLARE @myVariable INT;");

            // 5. 执行其他SQL语句
            ResultSet resultSet = statement.executeQuery("SELECT @myVariable;");
            while (resultSet.next()) {
                int value = resultSet.getInt(1);
                System.out.println("Value of myVariable: " + value);
            }

            // 6. 关闭连接
            resultSet.close();
            statement.close();
            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}