基于javaweb实现餐厅管理系统.zip

package com.wyu.web; import com.google.gson.Gson; import com.wyu.pojo.User; import com.wyu.service.UserService; import com.wyu.service.impl.UserServiceImpl; import com.wyu.utils.WebUtils; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.HashMap; import java.util.Map; public class UserServlet extends BaseServlet { private UserService userService = new UserServiceImpl(); protected void ajaxExistsUsername(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // 获取请求的参数username String username = req.getParameter("username"); // 调用userService.existsUsername(); boolean existsUsername = userService.existsUsername(username); // 把返回的结果封装成为map对象 Map<String,Object> resultMap = new HashMap<>(); resultMap.put("existsUsername",existsUsername); Gson gson = new Gson(); String json = gson.toJson(resultMap); resp.getWriter().write(json); } /** * 注销 * @param req * @param resp * @throws ServletException * @throws IOException */ protected void logout(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // 1、销毁Session中用户登录的信息（或者销毁Session） req.getSession().invalidate(); // 2、重定向到首页（或登录页面）。 resp.sendRedirect(req.getContextPath()); } /** * 处理登录的功能 * * @param req * @param resp * @throws ServletException * @throws IOException */ protected void login(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // 1、获取请求的参数 String username = req.getParameter("username"); String password = req.getParameter("password"); // 调用 userService.login()登录处理业务 User loginUser = userService.login(new User(null, username, password, null,null)); // 如果等于null,说明登录 失败! if (loginUser == null) { // 把错误信息，和回显的表单项信息，保存到Request域中 req.setAttribute("msg","用户或密码错误！"); req.setAttribute("username", username); // 跳回登录页面 req.getRequestDispatcher("/pages/user/login.jsp").forward(req, resp); } else { // 登录 成功 // 保存用户登录的信息到Session域中 req.getSession().setAttribute("user", loginUser); System.out.println(loginUser.getId()); if(loginUser.getRole()==1) { //跳到成功页面login_success.html req.getRequestDispatcher("/pages/user/login_success.jsp").forward(req, resp); }else { req.getRequestDispatcher("/pages/manager/manager.jsp").forward(req, resp); } } } /** * 处理注册的功能 * * @param req * @param resp * @throws ServletException * @throws IOException */ protected void regist(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // 1、获取请求的参数 String username = req.getParameter("username"); String password = req.getParameter("password"); String email = req.getParameter("email"); User user = WebUtils.copyParamToBean(req.getParameterMap(), new User()); System.out.println(username); System.out.println(password); System.out.println(email); // 3、检查 用户名是否可用 if (userService.existsUsername(username)) { System.out.println("用户名[" + username + "]已存在!"); // 把回显信息，保存到Request域中 req.setAttribute("msg", "用户名已存在！！"); req.setAttribute("username", username); req.setAttribute("email", email); // 跳回注册页面 req.getRequestDispatcher("/pages/user/regist.jsp").forward(req, resp); } else { // 可用 // 调用Sservice保存到数据库 userService.registUser(new User(null, username, password, email,1)); // 保存用户登录的信息到Session域中 req.getSession().setAttribute("user", user); System.out.println(user.getId()); // 跳到注册成功页面 regist_success.jsp req.getRequestDispatcher("/pages/user/regist_success.jsp").forward(req, resp); } } protected void regist2(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // 1、获取请求的参数 String username = req.getParameter("username"); String password = req.getParameter("password"); String email = req.getParameter("email"); User user = WebUtils.copyParamToBean(req.getParameterMap(), new User()); System.out.println(username); System.out.println(password); System.out.println(email); // 3、检查 用户名是否可用 if (userService.existsUsername(username)) { System.out.println("用户名[" + username + "]已存在!"); // 把回显信息，保存到Request域中 req.setAttribute("msg", "用户名已存在！！"); req.setAttribute("username", username); req.setAttribute("email", email); // 跳回注册页面 req.getRequestDispatcher("/pages/manager/registmanager.jsp").forward(req, resp); } else { // 可用 // 调用Sservice保存到数据库 userService.registUser(new User(null, username, password, email,2)); // 保存用户登录的信息到Session域中 req.getSession().setAttribute("user", user); System.out.println(user.getId()); // 跳到注册成功页面 regist_success.jsp req.getRequestDispatcher("/pages/manager/manager.jsp").forward(req, resp); } } }