Java语言怎么将网站上的程序下载到当前计算机（相关搜索：数据库）

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

public class FileDownloader {
    public static void main(String[] args) {
        String fileURL = "http://example.com/program.exe";
        String saveDir = "C:/downloads/";

        try {
            downloadFile(fileURL, saveDir);
            System.out.println("文件下载完成！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static void downloadFile(String fileURL, String saveDir) throws IOException {
        URL url = new URL(fileURL);
        URLConnection conn = url.openConnection();
        InputStream inputStream = conn.getInputStream();

        String fileName = fileURL.substring(fileURL.lastIndexOf("/") + 1);
        String saveFilePath = saveDir + fileName;

        FileOutputStream outputStream = new FileOutputStream(saveFilePath);

        int bytesRead;
        byte[] buffer = new byte[1024];
        while ((bytesRead = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }

        outputStream.close();
        inputStream.close();
    }
}

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DatabaseDownloader {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost/database";
        String user = "root";
        String password = "password";

        try {
            Connection conn = DriverManager.getConnection(url, user, password);
            Statement stmt = conn.createStatement();
            String query = "SELECT * FROM table";
            ResultSet rs = stmt.executeQuery(query);

            while (rs.next()) {
                // 处理查询结果
                String column1 = rs.getString("column1");
                int column2 = rs.getInt("column2");
                System.out.println(column1 + " " + column2);
            }

            rs.close();
            stmt.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}