mysql java备份

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

public class MySQLBackup {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "username";
        String password = "password";
        String backupFile = "backup.sql";

        try (Connection conn = DriverManager.getConnection(url, user, password);
             Statement stmt = conn.createStatement();
             FileOutputStream fos = new FileOutputStream(backupFile)) {

            // 获取数据库中的所有表名
            ResultSet tables = stmt.executeQuery("SHOW TABLES");
            while (tables.next()) {
                String tableName = tables.getString(1);
                // 导出每个表的数据
                ResultSet data = stmt.executeQuery("SELECT * FROM " + tableName);
                while (data.next()) {
                    StringBuilder sb = new StringBuilder();
                    for (int i = 1; i <= data.getMetaData().getColumnCount(); i++) {
                        sb.append(data.getString(i)).append(",");
                    }
                    fos.write(sb.toString().getBytes());
                    fos.write("\n".getBytes());
                }
            }
            System.out.println("Backup completed successfully!");
        } catch (SQLException | IOException e) {
            e.printStackTrace();
        }
    }
}