环境搭建UploadServletpublic class UploadServlet extends HttpServlet {protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {try {// 1.创建磁盘文件项

环境搭建UploadServletpublic class UploadServlet extends HttpServlet {protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {try {// 1.创建磁盘文件项

源代码public class PrepareStatementDemo2 {public static void main(String[] args) {Connection connection = null;PreparedStatement preparedStatement = null;try {Class.forName("com.mysql.jdbc.Driver");St

MYSQL5.7.17下载与安装教程下载与安装步骤配置环境变量与连接下载与安装步骤下载地址：https://downloads.mysql.com/archives/installer/选择版本以及系统，下载第二个，兼容64位双击安装勾选后点击next只勾选“Server only(仅服务器)”，安装其他的太占空间选择Execute后开始安装，等待安装完成之后，点击next点击next保持默认状态