java实现mysql备份

import java.io.FileOutputStream;
import java.io.IOException;
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 backupFilePath = "backup.sql";

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

            // 获取所有表名
            ResultSet tables = stmt.executeQuery("SHOW TABLES");
            while (tables.next()) {
                String tableName = tables.getString(1);
                // 导出表结构
                exportTableSchema(stmt, tableName, fos);
                // 导出表数据
                exportTableData(stmt, tableName, fos);
            }
            System.out.println("Backup completed successfully.");
        } catch (SQLException | IOException e) {
            e.printStackTrace();
        }
    }

    private static void exportTableSchema(Statement stmt, String tableName, FileOutputStream fos) throws SQLException, IOException {
        ResultSet resultSet = stmt.executeQuery("SHOW CREATE TABLE " + tableName);
        if (resultSet.next()) {
            fos.write(("DROP TABLE IF EXISTS " + tableName + ";\n").getBytes());
            fos.write(resultSet.getString(2).getBytes());
            fos.write(";\n\n".getBytes());
        }
        resultSet.close();
    }

    private static void exportTableData(Statement stmt, String tableName, FileOutputStream fos) throws SQLException, IOException {
        ResultSet resultSet = stmt.executeQuery("SELECT * FROM " + tableName);
        ResultSetMetaData metaData = resultSet.getMetaData();
        int columnCount = metaData.getColumnCount();

        while (resultSet.next()) {
            fos.write(("INSERT INTO " + tableName + " VALUES (").getBytes());
            for (int i = 1; i <= columnCount; i++) {
                if (i > 1) {
                    fos.write(", ".getBytes());
                }
                fos.write(resultSet.getString(i).getBytes());
            }
            fos.write(");\n".getBytes());
        }
        fos.write("\n".getBytes());
        resultSet.close();
    }
}