更新数据库的数据记录（JAVA）（修改密码）

package org.lxh.demo17.statementdemo;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

public class resetPassword {
    private static final String DBDRIVER = "com.mysql.jdbc.Driver";
    private static final String DBURL = "jdbc:mysql://localhost:3306/mldn";
    private static final String DBUSER = "root";
    private static final String DBPASS = "root";
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        Connection conn = null;
        Statement stmt = null;
        String sql = "update emp set ename='jjjj' where empno=123";
        System.out.println("wanchengSQLyuju");
        Class.forName(DBDRIVER);
        conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS);
        stmt = conn.createStatement();
        stmt.executeUpdate(sql);
        stmt.close();
        conn.close();
    }

}