删除

package com.company;

import java.sql.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;

public class JdbcTest04 {
    public static void main(String[] args) {
        //JDBC六步骤;
        Connection conn = null;
        PreparedStatement ps = null;

        //第一步;注册驱动

        try {
            Class.forName("com.mysql.jdbc.Driver");
            //第二步：获取连接
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/lianxi?useUnicode=true&characterEncoding=utf-8&autoReconnect=true&allowMultiQueries=true&serverTimezone=Asia/Shanghai", "root", "123456");

            //第三部：获取数据库预编译对象
//            String sql = "insert into t_user(loginName,loginPwd,realName) VALUES(?,?,?)";
//            String sql = "update t_user set loginName=?,loginPwd=?,realName=? where id=9";
            String sql="delete from t_user where id=?";
            ps = conn.prepareStatement(sql);
            //第四部：执行sql语句
//            ps.executeUpdate();
//            ps.setString(1, "王强");
            ps.setInt(1, Integer.parseInt("6"));
//            ps.setString(3, "按时");
            ps.executeUpdate();
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();


        } finally {
            //第五步：关闭资源

            if (ps != null) {
                try {
                    ps.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (conn != null) {
                try {
                    conn.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }}