JavaEE项目学习-网上书城系统

package com.li.web; import com.google.gson.Gson; import com.li.pojo.User; import com.li.service.UserService; import com.li.service.impl.UserServiceImpl; import com.li.utils.WebUtils; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.lang.reflect.Method; import java.util.HashMap; import java.util.Map; import static com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY; public class UserServlet extends BaseServlet { private UserService userService = new UserServiceImpl(); protected void ajaxExistusername(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String username = req.getParameter("username"); boolean existsUsername = userService.exitUsername(username); Map<String,Object> resultMap=new HashMap<>(); resultMap.put("existsUsername",existsUsername); Gson gson = new Gson(); String json = gson.toJson(resultMap); resp.getWriter().write(json); } protected void logout(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { req.getSession().invalidate(); resp.sendRedirect(req.getContextPath()); } protected void login(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String username = req.getParameter("username"); String password = req.getParameter("password"); User loginUSer = userService.login(new User(username, password, null)); if (loginUSer == null) { req.setAttribute("msg", "用户或者密码错误"); req.setAttribute("username", username); System.out.println("登录失败"); req.getRequestDispatcher("/pages/user/login.jsp").forward(req, resp); } else { //将登录信息保存到session中 req.getSession().setAttribute("user",loginUSer); req.getRequestDispatcher("/pages/user/login_success.jsp").forward(req, resp); } } protected void regist(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { //获取验证码 String token =(String) req.getSession().getAttribute(KAPTCHA_SESSION_KEY); //删除验证码防止重复提交 req.getSession().removeAttribute(KAPTCHA_SESSION_KEY); //获取请求参数 String username = req.getParameter("username"); String password = req.getParameter("password"); String email = req.getParameter("email"); String code = req.getParameter("code"); User user= WebUtils.copyParamToBean(req.getParameterMap(),new User()); //检查验证码要求验证码为abcde if (token !=null && token.equalsIgnoreCase(code)) { //检查用户名可用 if (userService.exitUsername(username)) { System.out.println("用户名存在"); req.setAttribute("msg", "用户名已存在"); req.setAttribute("username", username); req.setAttribute("email", email); req.getRequestDispatcher("/pages/user/regist.jsp").forward(req, resp); } else { //可用保存到数据库 userService.registUser(new User(username, password, email)); //跳转注册成功页面 req.getRequestDispatcher("/pages/user/regist_success.jsp").forward(req, resp); } } else { //跳回注册页面 req.setAttribute("msg", "验证码错误"); req.setAttribute("username", username); req.setAttribute("email", email); System.out.println("验证码错误"); req.getRequestDispatcher("/pages/user/regist.jsp").forward(req, resp); } } }