基于Java web的超市后台管理系统（源码+数据库）.zip

package github.servlet; import java.io.IOException; import java.io.PrintWriter; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.*; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.alibaba.fastjson.JSONArray; import com.mysql.jdbc.StringUtils; import github.pojo.Role; import github.pojo.User; import github.service.RoleServiceImpl; import github.service.UserServiceImpl; import github.service.impl.RoleService; import github.service.impl.UserService; import github.util.Constants; import github.util.PageSupport; @SuppressWarnings("serial") public class UserServlet extends HttpServlet { public UserServlet() { super(); } public void destroy() { super.destroy(); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String method = request.getParameter("method"); System.out.println("method----> " + method); if (method != null && method.equals("add")) { // 增加操作 this.add(request, response); } else if (method != null && method.equals("query")) { this.query(request, response); } else if (method != null && method.equals("getrolelist")) { this.getRoleList(request, response); } else if (method != null && method.equals("ucexist")) { this.userCodeExist(request, response); } else if (method != null && method.equals("deluser")) { this.delUser(request, response); } else if (method != null && method.equals("view")) { this.getUserById(request, response, "userview.jsp"); } else if (method != null && method.equals("modify")) { this.getUserById(request, response, "usermodify.jsp"); } else if (method != null && method.equals("modifyexe")) { this.modify(request, response); } else if (method != null && method.equals("pwdmodify")) { this.getPwdByUserId(request, response); } else if (method != null && method.equals("savepwd")) { this.updatePwd(request, response); } } private void updatePwd(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Object o = request.getSession().getAttribute(Constants.USER_SESSION); String newpassword = request.getParameter("newpassword"); boolean flag = false; if (o != null && !StringUtils.isNullOrEmpty(newpassword)) { UserService userService = new UserServiceImpl(); flag = userService.updatePwd(((User) o).getId(), newpassword); if (flag) { request.setAttribute(Constants.SYS_MESSAGE, "修改密码成功,请退出并使用新密码重新登录！"); request.getSession().removeAttribute(Constants.USER_SESSION);// session注销 } else { request.setAttribute(Constants.SYS_MESSAGE, "修改密码失败！"); } } else { request.setAttribute(Constants.SYS_MESSAGE, "修改密码失败！"); } request.getRequestDispatcher("pwdmodify.jsp").forward(request, response); } private void getPwdByUserId(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Object o = request.getSession().getAttribute(Constants.USER_SESSION); String oldpassword = request.getParameter("oldpassword"); Map<String, String> resultMap = new HashMap<String, String>(); if (null == o) {// session过期 resultMap.put("result", "sessionerror"); } else if (StringUtils.isNullOrEmpty(oldpassword)) {// 旧密码输入为空 resultMap.put("result", "error"); } else { String sessionPwd = ((User) o).getUserPassword(); if (oldpassword.equals(sessionPwd)) { resultMap.put("result", "true"); } else {// 旧密码输入不正确 resultMap.put("result", "false"); } } response.setContentType("application/json"); PrintWriter outPrintWriter = response.getWriter(); outPrintWriter.write(JSONArray.toJSONString(resultMap)); outPrintWriter.flush(); outPrintWriter.close(); } private void modify(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String id = request.getParameter("uid"); String userName = request.getParameter("userName"); String gender = request.getParameter("gender"); String birthday = request.getParameter("birthday"); String phone = request.getParameter("phone"); String address = request.getParameter("address"); String userRole = request.getParameter("userRole"); User user = new User(); user.setId(Integer.valueOf(id)); user.setUserName(userName); user.setGender(Integer.valueOf(gender)); try { user.setBirthday(new SimpleDateFormat("yyyy-MM-dd").parse(birthday)); } catch (ParseException e) { e.printStackTrace(); } user.setPhone(phone); user.setAddress(address); user.setUserRole(Integer.valueOf(userRole)); user.setModifyBy(((User) request.getSession().getAttribute(Constants.USER_SESSION)).getId()); user.setModifyDate(new Date()); UserService userService = new UserServiceImpl(); if (userService.modify(user)) { response.sendRedirect(request.getContextPath() + "/jsp/user.do?method=query"); } else { request.getRequestDispatcher("usermodify.jsp").forward(request, response); } } private void getUserById(HttpServletRequest request, HttpServletResponse response, String url) throws ServletException, IOException { String id = request.getParameter("uid"); if (!StringUtils.isNullOrEmpty(id)) { // 调用后台方法得到user对象 UserService userService = new UserServiceImpl(); User user = userService.getUserById(id); request.setAttribute("user", user); request.getRequestDispatcher(url).forward(request, response); } } private void delUser(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String id = request.getParameter("uid"); Integer delId = 0; try { delId = Integer.parseInt(id); } catch (Exception e) { delId = 0; } HashMap<String, String> resultMap = new HashMap<String, String>(); if (delId <= 0) { resultMap.put("delResult", "notexist"); } else { UserService userService = new UserServiceImpl(); if (userService.deleteUserById(delId)) { resultMap.put("delResult", "true"); } else { resultMap.put("delResult", "false"); } } // 把resultMap转换成json对象输出 response.setContentType("application/json"); PrintWriter outPrintWriter = response.getWriter(); outPrintWriter.write(JSONArray.toJSONString(resultMap)); outPrintWriter.flush(); outPrintWriter.close(); } private void userCodeExist(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 判断用户账号是否可用 String userCode = request.getParameter("userCode"); HashMap<String, String> resultMap = new HashMap<String, String>(); if (StringUtils.isNullOrEmpty(userCode)) { // userCode == null || userCode.equals("") resultMap.put("userCode", "exist"); } else { UserService userService = new UserServiceImpl(); User user = userService.selectUserCodeExist(userCode); if (null != user) { resultMap.put("userCode", "exist"); } else { resultMap.put("userCode", "notexist"); } } // 把resultMap转为json字符串以json的形式输出 // 配置上下文的输出类型 response.setContentType("application/json"); // 从response对象中获取往外输出的writer对象 PrintWriter outPrintWriter = response.getWriter(); // 把resultMap转为json字符串 输出 outPrintWriter.write(JSONArray.toJSONString(resultMap)); outPrintWriter.flush();// 刷新