本篇内容介绍了“Java如何实现茶叶售卖商城系统”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
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
主要代码
用户管理控制层
@WebServlet("/frontstage_userServlet")public class UserServlet extends HttpServlet {UserService service = new UserService(); @Overrideprotected 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();}} 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();}}} 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();}} public void logout(HttpServletRequest req, HttpServletResponse resp) {req.getSession().removeAttribute("user");try {resp.sendRedirect("index.jsp");} catch (IOException e) {e.printStackTrace();}} 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();} } 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();}} }商品管理服务类
@WebServlet("/frontstage_goodsServlet")public class GoodsServlet extends HttpServlet{GoodsService service = new GoodsService();@Overrideprotected 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;}}public void findAllGoods(HttpServletRequest req, HttpServletResponse resp) {Map<String, List<Goods>> 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();}}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();}}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();@Overrideprotected 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;}} 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();}} 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();}} public void getOrdersList(HttpServletRequest req,HttpServletResponse resp) {List<Orders> 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();}}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<String,String> parmas = new HashMap<>();parmas.put("name", name);//parmas.put("type", type);List<Orders> 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();}}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();}}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();}} 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();}}}“Java如何实现茶叶售卖商城系统”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注编程网网站，小编将为大家输出更多高质量的实用文章！
