基于Jetty+Servlet+Jsp+MySQL+MyBatis技术实现的简单博客系统

package cn.bytecollege.controller; import cn.bytecollege.model.User; import cn.bytecollege.service.impl.UserServiceImpl; import cn.bytecollege.util.WebConstant; import cn.hutool.crypto.SecureUtil; import jakarta.servlet.ServletException; import jakarta.servlet.annotation.WebServlet; import jakarta.servlet.http.HttpServlet; import jakarta.servlet.http.HttpServletRequest; import jakarta.servlet.http.HttpServletResponse; import jakarta.servlet.http.HttpSession; import java.io.IOException; @WebServlet(value = "admin/adminLogin") public class AdminLoginController extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.getRequestDispatcher(WebConstant.ADMIN_PREFIX + "login" + WebConstant.SUFFIX) .forward(request, response); } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获取数据 String username = request.getParameter("username"); String password = request.getParameter("password"); String validCode = request.getParameter("validCode"); //从session对象中获取验证码字符串 String code = request.getSession().getAttribute("code").toString(); //判断客户端用户输入的密码是否与服务器端生成的验证码相等 if (!validCode.equals(code)) { //不相等则封装提示信息返回前端页面 String msg = "验证码错误，请重新输入！"; request.setAttribute("msg", msg); //重新请求转发至管理员登录页面 request.getRequestDispatcher(WebConstant.ADMIN_PREFIX + "login" + WebConstant.SUFFIX) .forward(request, response); return; } //创建service对象 UserServiceImpl userLogin = new UserServiceImpl(); //调用方法通过用户名获取得到user对象 User user = userLogin.findByUsername(username); //将从jsp页面上获取得到的密码明文进行加密处理 password = SecureUtil.md5(password).toLowerCase(); //如果获取得到的用户为null,那么用户不存在，跳转回登录页 if (user == null) { request.setAttribute("msg", "用户不存在"); request.getRequestDispatcher(WebConstant.ADMIN_PREFIX + "login" + WebConstant.SUFFIX).forward(request, response); return; } if (user.getRole()<1){ request.setAttribute("msg", "用户身份异常"); request.getRequestDispatcher(WebConstant.ADMIN_PREFIX + "login" + WebConstant.SUFFIX).forward(request, response); return; } if (user.getState()>0){ request.setAttribute("msg", "用户已经被禁用"); request.getRequestDispatcher(WebConstant.ADMIN_PREFIX + "login" + WebConstant.SUFFIX).forward(request, response); return; } //如果从jsp页面上获取得到的密码与user对象中的值相等那么用户验证成功，跳转到studentList页面 if (user.getPassword().equals(password)) { //创建session对象 HttpSession session = request.getSession(); //将登录成功用户的相关信息保存到session对象中 session.setAttribute("adminLogin", user); response.sendRedirect(request.getContextPath() + "adminIndex"); return; } //如果都不满足条件，不跳转页面，并且反馈用户名或密码错误 request.setAttribute("msg", "用户名或密码错误"); request.getRequestDispatcher(WebConstant.ADMIN_PREFIX + "login" + WebConstant.SUFFIX).forward(request, response); } }