package com.bjpowernode.jdbc; import java.sql.*; /** * @Author:杨青 * @Time:2021/10/26 17:09 * @Description: * PreparedStatement完成insert delete update */ public class JDBCTest09 { public static void main(String[] args) { Connection conn=null; PreparedStatement ps=null; try { //1.类加载完成注册驱动 Class.forName("com.mysql.jdbc.Driver"); //2.获取连接 conn= DriverManager.getConnection("jdbc:mysql://localhost:3306/bjpowernode","root","123456"); //3.获取预编译数据库操作对象 //String sql="insert into t_user (loginName,loginPwd,realName)values(?,?,?)"; //String sql="update t_user set loginName='python',loginPwd='111',realName='Python' where id=4"; String sql="delete from t_user where id=4 "; ps=conn.prepareStatement(sql); /* ps.setString(1,"java"); ps.setString(2,"000"); ps.setString(3,"Java"); //4.执行sql语句 */ int count=ps.executeUpdate(); System.out.println("执行语句条数:"+count); } catch (Exception e) { e.printStackTrace(); } finally { //6.释放资源 if(ps!=null){ try { ps.close(); } catch (SQLException throwables) { throwables.printStackTrace(); } } if(conn!=null){ try { conn.close(); } catch (SQLException throwables) { throwables.printStackTrace(); } } } } }