如何通过Simba JDBC Driver for Google Spanner使用服务帐户密钥

import java.sql.*;

public class SpannerExample {
    public static void main(String[] args) {
        String jdbcUrl = "jdbc:google:spanner://localhost:9010/projects/<project-id>/instances/<instance-id>/databases/<database-id>";
        String serviceAccountKeyPath = "/path/to/service-account-key.json";

        try {
            // 加载Simba JDBC Driver
            Class.forName("com.simba.google.jdbc.Driver");

            // 配置连接属性
            java.util.Properties properties = new java.util.Properties();
            properties.setProperty("PrivateKeyPath", serviceAccountKeyPath);

            // 建立数据库连接
            Connection connection = DriverManager.getConnection(jdbcUrl, properties);

            // 执行SQL查询或更新操作
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery("SELECT * FROM your_table");

            // 处理查询结果
            while (resultSet.next()) {
                // 处理每一行数据
            }

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