java导出mysql文件

import java.io.*;
import java.sql.*;

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

        try (Connection conn = DriverManager.getConnection(url, user, password);
             Statement stmt = conn.createStatement();
             BufferedWriter bw = new BufferedWriter(new FileWriter(outputFile))) {

            ResultSet rs = stmt.executeQuery("SELECT * FROM mytable");

            while (rs.next()) {
                StringBuilder sb = new StringBuilder();
                ResultSetMetaData metaData = rs.getMetaData();
                int columnCount = metaData.getColumnCount();

                sb.append("INSERT INTO mytable VALUES (");
                for (int i = 1; i <= columnCount; i++) {
                    if (i > 1) sb.append(", ");
                    sb.append("'").append(rs.getString(i)).append("'");
                }
                sb.append(");");
                bw.write(sb.toString());
                bw.newLine();
            }

            System.out.println("Data exported to " + outputFile);

        } catch (SQLException | IOException e) {
            e.printStackTrace();
        }
    }
}

import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVPrinter;

import java.io.*;
import java.sql.*;

public class ExportMySQLToCSV {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "username";
        String password = "password";
        String outputFile = "exported_data.csv";

        try (Connection conn = DriverManager.getConnection(url, user, password);
             Statement stmt = conn.createStatement();
             ResultSet rs = stmt.executeQuery("SELECT * FROM mytable");
             BufferedWriter bw = new BufferedWriter(new FileWriter(outputFile));
             CSVPrinter csvPrinter = new CSVPrinter(bw, CSVFormat.DEFAULT.withHeader("column1", "column2", "column3"))) {

            while (rs.next()) {
                csvPrinter.printRecord(rs.getString("column1"), rs.getString("column2"), rs.getString("column3"));
            }

            System.out.println("Data exported to " + outputFile);

        } catch (SQLException | IOException e) {
            e.printStackTrace();
        }
    }
}