mysql java备份功能

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)) {

            ResultSet rs = stmt.executeQuery("SHOW TABLES");
            while (rs.next()) {
                String tableName = rs.getString(1);
                ResultSet tableData = stmt.executeQuery("SELECT * FROM " + tableName);
                fos.write(("DROP TABLE IF EXISTS " + tableName + ";\n").getBytes());
                fos.write(("CREATE TABLE " + tableName + " (\n").getBytes());

                ResultSetMetaData metaData = tableData.getMetaData();
                int columnCount = metaData.getColumnCount();
                for (int i = 1; i <= columnCount; i++) {
                    fos.write(metaData.getColumnName(i).getBytes());
                    fos.write(" ".getBytes());
                    fos.write(metaData.getColumnTypeName(i).getBytes());
                    if (i < columnCount) {
                        fos.write(",\n".getBytes());
                    }
                }
                fos.write(");\n\n".getBytes());

                while (tableData.next()) {
                    fos.write(("INSERT INTO " + tableName + " VALUES (").getBytes());
                    for (int i = 1; i <= columnCount; i++) {
                        fos.write("'" + tableData.getString(i) + "'");
                        if (i < columnCount) {
                            fos.write(", ".getBytes());
                        }
                    }
                    fos.write(");\n".getBytes());
                }
                fos.write("\n".getBytes());
            }
            System.out.println("Backup completed successfully.");
        } catch (SQLException | IOException e) {
            e.printStackTrace();
        }
    }
}