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JAVA×SQL③

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課題

問題: JBDCを使用しupdate文を実行せよ
使用ツール: XAMPP、eclipse

回答


package DBA;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;

public class DBA3 {

	public static void main(String[] args)throws SQLException {
		System.out.println("社員ID入力");
		Scanner s=new Scanner(System.in);
		int ID1=s.nextInt();
		System.out.println("部署ID(変更後)入力");
		int ID2=s.nextInt();
		
		String url="jdbc:mysql://localhost/JDBC";
		String user ="root";
		String password ="";
		Connection con = DriverManager.getConnection(url,user,password);
		PreparedStatement pstmt =con.prepareStatement
				("update woker set co_id = ? where id = ?");
			pstmt.setInt(1,ID2);
			pstmt.setInt(2,ID1);
			int rows= pstmt.executeUpdate();
			System.out.println(rows+"件のデータを変更しました");
			}
}

実行結果


社員ID入力
1
部署ID(変更後)入力
1
1件のデータを変更しました

本日の気付き:int rows= pstmt.executeUpdate();があることで変更件数がわかります

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