目录

• 前言
• 实现效果
• 主要代码
• 用户管理控制层
• 商品管理服务类
• 订单控制层

前言 这是一个应用SSM框架的项目，前端页面整洁清晰。该系统有两个角色，一个是普通用户，另一个是管理员。
普通用户具有注册、登录、查看商品、添加购物车、添加商品收藏、下订单、商品评价、用户地址管理等等功能。
管理员具有登录、管理用户信息、管理商品信息、管理商品活动信息、管理订单信息、管理用户评论信息的等等功能。
应用技术：Jsp + SSM + EasyUi
运行环境：eclipse/IDEA + MySQL5.7 + Tomcat8.5 + JDK1.8

实现效果
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主要代码
用户管理控制层

@WebServlet("/frontstage_userServlet")public class UserServlet extends HttpServlet { UserService service = new UserService(); @Override protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {String action = req.getParameter("action"); switch (action) {case "login":login(req, resp); break; case "checkUserNameRepeat":checkUserNameRepeat(req, resp); break; case "register":register(req, resp); break; case "logout":logout(req, resp); break; case "checkOldPassword":checkOldPassword(req, resp); break; case "modifyPassword":modifyPassword(req, resp); break; } } public void login(HttpServletRequest req, HttpServletResponse resp) throws IOException {//设置请求编码格式:req.setCharacterEncoding("utf-8"); //设置响应编码格式resp.setContentType("text/html; charset=utf-8"); String userName = req.getParameter("userName"); String password = req.getParameter("password"); String captcha = req.getParameter("captcha"); if (captcha != null) {captcha = captcha.toUpperCase(); } // 先进行验证码验证String checkcode = (String) req.getSession().getAttribute("checkcode_session"); try {// 将用户输入的验证码和 系统验证对比if (checkcode.equals(captcha)) {User user = service.getUserByNameAndPassword(userName, password); if (user != null) {HttpSession session = req.getSession(); session.setAttribute("user", user); JSONResult ok = JSONResult.ok(); resp.getWriter().println(JsonUtil.javaObjectToJson(ok)); } else {// 将错误信息封装在结果集中JSONResult result = JSONResult.errorMsg("用户名或密码错误，请重试"); // 以json的形式返回给前端resp.getWriter().println(JsonUtil.javaObjectToJson(result)); }} else {// 将错误信息封装在结果集中JSONResult result = JSONResult.errorMsg("验证码输入错误，请重试"); // 以json的形式返回给前端resp.getWriter().println(JsonUtil.javaObjectToJson(result)); }} catch (Exception e) {e.printStackTrace(); } } /*** 用户名重名检测* * @param req* @param resp*/ public void checkUserNameRepeat(HttpServletRequest req, HttpServletResponse resp) {String userName = req.getParameter("userName"); if (userName != null) {int d = service.checkUserNameRepeat(userName); try {if (d > 0) {JSONResult error = JSONResult.errorMsg(""); resp.getWriter().println(JsonUtil.javaObjectToJson(error)); } else {JSONResult ok = JSONResult.ok(); resp.getWriter().println(JsonUtil.javaObjectToJson(ok)); }} catch (Exception e) {e.printStackTrace(); }} } /*** 用户注册* * @param req* @param resp* @throws IOException */ public void register(HttpServletRequest req, HttpServletResponse resp) throws IOException {//设置请求编码格式:req.setCharacterEncoding("utf-8"); //设置响应编码格式resp.setContentType("text/html; charset=utf-8"); User user = new User(); user.setUserName(req.getParameter("userName")); user.setPassword(req.getParameter("password")); user.setEmail(req.getParameter("email")); user.setPhone(req.getParameter("phoneNum")); user.setRole("ordinaryUser"); int d = service.addUser(user); try {if (d > 0) {JSONResult ok = JSONResult.ok(); resp.getWriter().println(JsonUtil.javaObjectToJson(ok)); } else {JSONResult error = JSONResult.errorMsg("注册失败"); resp.getWriter().println(JsonUtil.javaObjectToJson(error)); }} catch (Exception e) {e.printStackTrace(); } } /*** 退出登录*/ public void logout(HttpServletRequest req, HttpServletResponse resp) {req.getSession().removeAttribute("user"); try {resp.sendRedirect("index.jsp"); } catch (IOException e) {e.printStackTrace(); } } /*** 检查旧密码是否正确 ，在修改密码操作时使用* @throws IOException */ public void checkOldPassword(HttpServletRequest req, HttpServletResponse resp) throws IOException {//设置请求编码格式:req.setCharacterEncoding("utf-8"); //设置响应编码格式resp.setContentType("text/html; charset=utf-8"); User user = (User) req.getSession().getAttribute("user"); String oldPassword = service.getPasswordById(user.getId()); System.out.println("旧密码："+oldPassword); String password = req.getParameter("password"); System.out.println("旧密码验证："+password); try {if (!oldPassword.equals(password)) {JSONResult errorMsg = JSONResult.errorMsg("原始密码错误，请重新输入"); resp.getWriter().println(JsonUtil.javaObjectToJson(errorMsg)); } else {JSONResult ok = JSONResult.ok(); resp.getWriter().println(JsonUtil.javaObjectToJson(ok)); }} catch (IOException e) {e.printStackTrace(); } } /*** 修改密码* @throws IOException */ public void modifyPassword(HttpServletRequest req, HttpServletResponse resp) throws IOException {//设置请求编码格式:req.setCharacterEncoding("utf-8"); //设置响应编码格式resp.setContentType("text/html; charset=utf-8"); String password = req.getParameter("newPassword"); System.out.println("新密码："+password); User user = (User) req.getSession().getAttribute("user"); int id = user.getId(); System.out.println("旧密码id"+id); int d = service.updatePasswordById(id, password); try {if (d > 0) {JSONResult ok = JSONResult.ok(); resp.getWriter().println(JsonUtil.javaObjectToJson(ok)); } else {JSONResult errorMsg = JSONResult.errorMsg("修改失败，请重试"); resp.getWriter().println(JsonUtil.javaObjectToJson(errorMsg)); } } catch (Exception e) {e.printStackTrace(); } } }

【Java实现茶叶售卖商城系统(java+SSM+JSP+EasyUi+mysql)】
商品管理服务类

@WebServlet("/frontstage_goodsServlet")public class GoodsServlet extends HttpServlet{ GoodsService service = new GoodsService(); @Override protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {String action = req.getParameter("action"); switch(action) {case "findAllGoods":findAllGoods(req,resp); break; case "findGoodsById":findGoodsById(req,resp); break; case "findGoodsByType":findGoodsByType(req,resp); break; } } /*** 获取所有商品列表* @param req* @param resp*/ public void findAllGoods(HttpServletRequest req, HttpServletResponse resp) {Map> allGoods = service.getAllGoods(); try {req.setAttribute("allGoods", allGoods); req.getRequestDispatcher("/main.jsp").forward(req, resp); return; } catch (ServletException e) {e.printStackTrace(); } catch (IOException e) {e.printStackTrace(); } } /***根据类型获得商品列表 * @param req* @param resp*/ public void findGoodsByType(HttpServletRequest req, HttpServletResponse resp) {String type = req.getParameter("type"); String currentPage = req.getParameter("currentPage"); PageBean pageBean = null; // 如果当前第几页currentPage 值为null，说明第一次跳转到此页面或者是要跳转到首页，则设定该值currentPage默认为1if(currentPage == null) {pageBean = service.getGoodsByType(type, 4, 1); }else {pageBean = service.getGoodsByType(type, 4, Integer.parseInt(currentPage)); }try {req.setAttribute("pageBean", pageBean); req.setAttribute("type", type); req.getRequestDispatcher("/product.jsp").forward(req, resp); } catch (Exception e) {e.printStackTrace(); } } /*** 获取商品的详细信息* @param req* @param resp*/ public void findGoodsById(HttpServletRequest req, HttpServletResponse resp) {int id =Integer.parseInt(req.getParameter("id")); Goods goodsInfo = service.getGoodsInfoById(id); try {req.setAttribute("pro", goodsInfo); req.getRequestDispatcher("/productInfo_user.jsp").forward(req, resp); } catch (Exception e) {e.printStackTrace(); } }}

订单控制层

@WebServlet("/backstage_ordersServlet")public class OrdersServlet extends HttpServlet{ OrdersService service = new OrdersService(); @Override protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {String action = req.getParameter("action"); System.out.println(action); switch(action) {case "getOrdersList":getOrdersList(req,resp); break; case "getOrdersListByName":getOrdersListByName(req,resp); break; case "deleteOrders":deleteOrders(req,resp); break; case "deleteAllOrders":deleteAllOrders(req,resp); break; case "toOrdersUpdatePage":toOrdersUpdatePage(req,resp); break; case "updateOrders":updateOrders(req,resp); break; case "fastbuy":sendOrder(req,resp); break; } } /* * 删除全部订单 */ private void deleteAllOrders(HttpServletRequest req, HttpServletResponse resp) throws IOException {//设置请求编码格式:req.setCharacterEncoding("utf-8"); //设置响应编码格式resp.setContentType("text/html; charset=utf-8"); // TODO 自动生成的方法存根int d = service.deleteAllOrders(); try {if(d>0) {JSONResult ok = JSONResult.ok(); resp.getWriter().println(JsonUtil.javaObjectToJson(ok)); }else {JSONResult errorMsg = JSONResult.errorMsg("删除失败，请重试"); resp.getWriter().println(JsonUtil.javaObjectToJson(errorMsg)); }} catch (Exception e) {e.printStackTrace(); } } /*** 提交订单* @throws IOException */ public void sendOrder(HttpServletRequest req, HttpServletResponse resp) throws IOException {//设置请求编码格式:req.setCharacterEncoding("utf-8"); //设置响应编码格式resp.setContentType("text/html; charset=utf-8"); SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //设置日期格式User user =(User) req.getSession().getAttribute("user"); Orders order = new Orders(); order.setNumber(order.getRandomString(10)); order.setTime(df.format(new Date())); order.setName(req.getParameter("recipients")); order.setAddress(req.getParameter("address")); order.setPhone(req.getParameter("phone")); order.setAddress_label(req.getParameter("addressLabel")); order.setSex(req.getParameter("sex")); order.setUser(user.getUserName()); order.setGoods_id(Integer.parseInt(req.getParameter("id"))); order.setGoods_num(Integer.parseInt(req.getParameter("num"))); order.setGoods_status(1); int d = service.addOrder(order); try {if(d>0) {JSONResult ok = JSONResult.ok(); resp.getWriter().println(JsonUtil.javaObjectToJson(ok)); }else {JSONResult error = JSONResult.errorMsg("订单提交失败!"); resp.getWriter().println(JsonUtil.javaObjectToJson(error)); }} catch (Exception e) {e.printStackTrace(); } } /*** 向前端页面返回订单数据列表*/ public void getOrdersList(HttpServletRequest req,HttpServletResponse resp) {List allOrders = service.getAllOrders(); req.setAttribute("ordersList",allOrders); try {req.getRequestDispatcher("/backstage/tgls/ordersManage/orders_list.jsp").forward(req, resp); } catch (ServletException e) {e.printStackTrace(); } catch (IOException e) {e.printStackTrace(); } } /*** 根据订单名查询商品(注意！类别没改)* @param req* @param resp* @throws IOException */ public void getOrdersListByName(HttpServletRequest req,HttpServletResponse resp) throws IOException {//设置请求编码格式:req.setCharacterEncoding("utf-8"); //设置响应编码格式resp.setContentType("text/html; charset=utf-8"); String name = req.getParameter("OrdersUser"); //String type = req.getParameter("type"); Map parmas = new HashMap<>(); parmas.put("name", name); //parmas.put("type", type); List list = service.getOrdersByName(parmas); try {if(list != null) {JSONResult ok = JSONResult.ok(list); resp.getWriter().println(JsonUtil.javaObjectToJson(ok)); }else {JSONResult errorMsg = JSONResult.errorMsg("未获取到任何数据，请重试"); resp.getWriter().println(JsonUtil.javaObjectToJson(errorMsg)); }} catch (Exception e) {e.printStackTrace(); } } /*** 修改订单时，获取此订单的全部数据，并返回至修改页面*/ public void toOrdersUpdatePage(HttpServletRequest req,HttpServletResponse resp) {int id = Integer.parseInt(req.getParameter("id")); Orders orders = service.getOrdersInfoById(id); req.setAttribute("orders", orders); try {req.getRequestDispatcher("/backstage/tgls/ordersManage/orders_update.jsp").forward(req, resp); } catch (ServletException e) {e.printStackTrace(); } catch (IOException e) {e.printStackTrace(); } } /***修改订单* @throws IOException */ public void updateOrders(HttpServletRequest req,HttpServletResponse resp) throws IOException {//设置请求编码格式:req.setCharacterEncoding("utf-8"); //设置响应编码格式resp.setContentType("text/html; charset=utf-8"); Orders orders = new Orders(); orders.setId(Integer.parseInt(req.getParameter("id"))); orders.setNumber(req.getParameter("number")); orders.setUser(req.getParameter("user")); orders.setTime(req.getParameter("time")); orders.setName(req.getParameter("name")); orders.setSex(req.getParameter("sex")); orders.setAddress(req.getParameter("address")); orders.setPhone(req.getParameter("phone")); orders.setAddress_label(req.getParameter("address_label")); orders.setGoods_id(Integer.parseInt(req.getParameter("goods_id"))); orders.setGoods_num(Integer.parseInt(req.getParameter("goods_num"))); orders.setGoods_status(Integer.parseInt(req.getParameter("goods_status"))); System.out.println(orders); int d = service.updateOrdersById(orders); System.out.println(d); try {if(d>0) {JSONResult ok = JSONResult.ok(); resp.getWriter().println(JsonUtil.javaObjectToJson(ok)); }else {JSONResult errorMsg = JSONResult.errorMsg("修改失败，请重试"); resp.getWriter().println(JsonUtil.javaObjectToJson(errorMsg)); }} catch (Exception e) {e.printStackTrace(); } } /*** 删除订单* @throws UnsupportedEncodingException */ public void deleteOrders(HttpServletRequest req,HttpServletResponse resp) throws UnsupportedEncodingException {//设置请求编码格式:req.setCharacterEncoding("utf-8"); //设置响应编码格式resp.setContentType("text/html; charset=utf-8"); int id = Integer.parseInt(req.getParameter("id")); int d = service.deleteOrdersById(id); try {if(d>0) {JSONResult ok = JSONResult.ok(); resp.getWriter().println(JsonUtil.javaObjectToJson(ok)); }else {JSONResult errorMsg = JSONResult.errorMsg("删除失败，请重试"); resp.getWriter().println(JsonUtil.javaObjectToJson(errorMsg)); }} catch (Exception e) {e.printStackTrace(); } }}

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