Java项目：基于Jsp实现网上订餐系统

项目编号：BS-SC-001

本项目基于JSP+SERVLET+Durid连接池进行开发实现，数据库采用MYSQL数据库，开发工具为IDEA或ECLIPSE，前端用采用BootStrap开发实现。系统采用三层架构设计，MVC设计模式。系统功能完整，页面简洁大方，维护方便，适合做毕业设计使用。

具体系统功能展示如下：

前台页面功能：

分类显示

餐品详情

添加购物车

个人订单管理

个人资料修改

系统留言

最近浏览功能

后台管理功能：

管理员登陆： admin / admin

用户管理

分类管理

餐品管理

订单管理

留言管理

新闻管理

本系统是一款优秀的毕业设计系统，完美的实现了基于餐饮业务的网上订餐流程，功能强大，运行稳定，结构清晰，便于修改，适合做毕业设计使用。

部分核心代码：

package cn.jbit.easybuy.web;import java.io.IOException;import java.util.HashMap;import java.util.List;import java.util.Map;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import cn.jbit.easybuy.biz.FacilityService;import cn.jbit.easybuy.biz.OrderService;import cn.jbit.easybuy.biz.ProductService;import cn.jbit.easybuy.biz.impl.FacilityServiceImpl;import cn.jbit.easybuy.biz.impl.OrderServiceImpl;import cn.jbit.easybuy.biz.impl.ProductServiceImpl;import cn.jbit.easybuy.entity.News;import cn.jbit.easybuy.entity.Pager;import cn.jbit.easybuy.entity.Product;import cn.jbit.easybuy.entity.ProductCategory;import cn.jbit.easybuy.entity.ShoppingCart;import cn.jbit.easybuy.entity.User;import cn.jbit.easybuy.util.ActionResult;import cn.jbit.easybuy.util.Validator;public class CartServlet extends HttpServlet {protected Map<String, ActionResult> viewMapping = new HashMap<String, ActionResult>();private ProductService productService;private FacilityService facilityService;private OrderService orderService;public void init() throws ServletException {productService = new ProductServiceImpl();facilityService = new FacilityServiceImpl();orderService = new OrderServiceImpl();}protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {doPost(req, resp);}protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {req.setCharacterEncoding("utf-8");createViewMapping();String actionIndicator = req.getParameter("action");String result = "";if (actionIndicator == null)actionIndicator = "list";if ("list".endsWith(actionIndicator)) {result = list(req);} else if ("add".endsWith(actionIndicator)) {result = add(req);} else if ("mod".endsWith(actionIndicator)) {result = mod(req);} else if ("remove".endsWith(actionIndicator)) {result = remove(req);} else if ("pay".endsWith(actionIndicator)) {result = pay(req);}toView(req, resp, result);}private String pay(HttpServletRequest request) {ShoppingCart cart = getCartFromSession(request);User user = getUserFromSession(request);if(user==null)return "login";orderService.payShoppingCart(cart, user);removeCartFromSession(request);return "paySuccess";}private void removeCartFromSession(HttpServletRequest request) {request.getSession().removeAttribute("cart");}private User getUserFromSession(HttpServletRequest request) {HttpSession session = request.getSession();return (User) session.getAttribute("loginUser");}private String add(HttpServletRequest request) {String id = request.getParameter("entityId");String quantityStr = request.getParameter("quantity");long quantity = 1;if (!Validator.isEmpty(quantityStr))quantity = Long.parseLong(quantityStr);Product product = productService.findById(id);ShoppingCart cart = getCartFromSession(request);cart.addItem(product, quantity);return "addSuccess";}private String mod(HttpServletRequest request) {String id = request.getParameter("entityId");String quantityStr = request.getParameter("quantity");long quantity = 1;if (!Validator.isEmpty(quantityStr))quantity = Long.parseLong(quantityStr);String indexStr = request.getParameter("index");ShoppingCart cart = getCartFromSession(request);cart.modifyQuantity(Integer.parseInt(indexStr), quantity);return "modSuccess";}private String remove(HttpServletRequest request) {String id = request.getParameter("entityId");String quantityStr = request.getParameter("quantity");long quantity = 1;if (!Validator.isEmpty(quantityStr))quantity = Long.parseLong(quantityStr);String indexStr = request.getParameter("index");ShoppingCart cart = getCartFromSession(request);cart.getItems().remove(Integer.parseInt(indexStr));return "removeSuccess";}private ShoppingCart getCartFromSession(HttpServletRequest request) {HttpSession session = request.getSession();ShoppingCart cart = (ShoppingCart) session.getAttribute("cart");if (cart == null) {cart = new ShoppingCart();session.setAttribute("cart", cart);}//取出当前用户的订单列表return cart;}private String list(HttpServletRequest request) {getCartFromSession(request);return "listSuccess";}private void prepareCategories(HttpServletRequest request) {List<ProductCategory> categories = productService.getProductCategories(null);request.setAttribute("categories", categories);}private void prepareNews(HttpServletRequest request) {List<News> allNews = facilityService.getAllNews(new Pager(10, 1));request.setAttribute("allNews", allNews);}protected void createViewMapping() {this.addMapping("listSuccess", "shopping.jsp");this.addMapping("paySuccess", "shopping-result.jsp");this.addMapping("addSuccess", "Cart", true);this.addMapping("removeSuccess", "Cart", true);this.addMapping("modSuccess", "Cart", true);this.addMapping("login", "login.jsp");}private void toView(HttpServletRequest req, HttpServletResponse resp,String result) throws IOException, ServletException {ActionResult dest = this.viewMapping.get(result);if (dest.isRedirect()) {resp.sendRedirect(dest.getViewName());} else {req.getRequestDispatcher(dest.getViewName()).forward(req, resp);}}protected void addMapping(String viewName, String url) {this.viewMapping.put(viewName, new ActionResult(url));}protected void addMapping(String viewName, String url, boolean isDirect) {this.viewMapping.put(viewName, new ActionResult(url, isDirect));}}

package cn.jbit.easybuy.web;import java.io.IOException;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import cn.jbit.easybuy.biz.ProductService;import cn.jbit.easybuy.biz.impl.ProductServiceImpl;import cn.jbit.easybuy.entity.ProductCategory;import cn.jbit.easybuy.util.ActionResult;import cn.jbit.easybuy.util.Validator;public class CategoryServlet extends HttpServlet {private ProductService productService;public void init() throws ServletException {productService = new ProductServiceImpl();}protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {doPost(req, resp);}protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {req.setCharacterEncoding("utf-8");String actionIndicator = req.getParameter("action");ActionResult result = new ActionResult("error");Validator validator = new Validator(Validator.toSingleParameters(req));if (actionIndicator == null)actionIndicator = "list";if ("read".endsWith(actionIndicator)) {result = read(req, validator);} else if ("list".endsWith(actionIndicator)) {result = list(req, validator);} else if ("create".endsWith(actionIndicator)) {result = create(req, validator);} else if ("delete".endsWith(actionIndicator)) {result = delete(req, validator);} else if ("save".endsWith(actionIndicator)) {boolean isEdit = true;String editIndicator = req.getParameter("entityId");if (Validator.isEmpty(editIndicator))isEdit = false;result = save(req, validator, isEdit);}if (!validator.hasErrors() && result.isRedirect()) {resp.sendRedirect(result.getViewName());} else {req.setAttribute("errors", validator.getErrors());req.getRequestDispatcher(result.getViewName()).forward(req, resp);}}public ActionResult read(HttpServletRequest request, Validator validator) {ProductCategory category = productService.findCategoryById(request.getParameter("entityId"));pupulateRequest(request, category);List<ProductCategory> categories = productService.getRootCategories();request.setAttribute("categories", categories);return new ActionResult("productClass-modify.jsp");}public ActionResult save(HttpServletRequest request, Validator validator,boolean isEdit) {String entityId = request.getParameter("entityId");checkInputErrors(request, validator);saveToDatabase(request, validator, isEdit);return new ActionResult("Category", true);}public ActionResult create(HttpServletRequest request, Validator validator) {List<ProductCategory> categories = productService.getRootCategories();request.setAttribute("categories", categories);request.setAttribute("parentId", 0);return new ActionResult("productClass-modify.jsp");}public ActionResult delete(HttpServletRequest request, Validator validator) {productService.deleteCategory(request.getParameter("entityId"));return new ActionResult("Category", true);}public ActionResult list(HttpServletRequest request, Validator validator) {List<ProductCategory> categories = productService.getProductCategories(null);request.setAttribute("categories", categories);return new ActionResult("productClass.jsp");}private void saveToDatabase(HttpServletRequest request,Validator validator, boolean isEdit) {if (!validator.hasErrors()) {ProductCategory productCategory;if (!isEdit) {productCategory = new ProductCategory();populateEntity(request, productCategory);productCategory.setParentId(Long.parseLong(request.getParameter("parentId")));productService.saveCategory(productCategory);} else {productCategory = productService.findCategoryById(request.getParameter("entityId"));Long parentId = Long.parseLong(request.getParameter("parentId"));populateEntity(request, productCategory);if (parentId == 0) {if (productCategory.getId().equals(productCategory.getParentId())) {// 说明是一级分类，父分类不能修改，只能改名字productService.updateCategoryName(productCategory);} else {// 二级分类修改为一级分类了,需要额外更新：// Product原先属于该二级分类的，全部更新一级为它，二级为空productCategory.setParentId(productCategory.getId());productService.updateCategory(productCategory,"Level2To1");}} else {if (!parentId.equals(productCategory.getParentId())) {// 二级分类修改了父分类,需要额外更新：// Product原先属于该二级分类的，全部更新一级为新的父分类productCategory.setParentId(parentId);productService.updateCategory(productCategory,"ModifyParent");} else {// 二级分类修改了名字productService.updateCategoryName(productCategory);}}}}}private void pupulateRequest(HttpServletRequest request,ProductCategory productCategory) {request.setAttribute("entityId", Long.toString(productCategory.getId()));request.setAttribute("name", productCategory.getName());request.setAttribute("parentId", (productCategory.getParentId().equals(productCategory.getId())) ? 0 : productCategory.getParentId());}private void checkInputErrors(HttpServletRequest request,Validator validator) {validator.checkRequiredError(new String[] { "name" });}private void populateEntity(HttpServletRequest request,ProductCategory productCategory) {productCategory.setName(request.getParameter("name"));}}

package cn.jbit.easybuy.web;import java.io.IOException;import java.util.Date;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import cn.jbit.easybuy.biz.FacilityService;import cn.jbit.easybuy.biz.ProductService;import cn.jbit.easybuy.biz.impl.FacilityServiceImpl;import cn.jbit.easybuy.biz.impl.ProductServiceImpl;import cn.jbit.ment;import cn.jbit.easybuy.entity.Pager;import cn.jbit.easybuy.entity.ProductCategory;import cn.jbit.easybuy.util.ActionResult;import cn.jbit.easybuy.util.Validator;public class CommentServlet extends HttpServlet {private FacilityService facilityService;private ProductService productService;public void init() throws ServletException {this.facilityService = new FacilityServiceImpl();this.productService = new ProductServiceImpl();}protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {doPost(req, resp);}protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {req.setCharacterEncoding("utf-8");String actionIndicator = req.getParameter("action");ActionResult result = new ActionResult("error");Validator validator = new Validator(Validator.toSingleParameters(req));if (actionIndicator == null)actionIndicator = "list";if ("read".endsWith(actionIndicator)) {result = read(req, validator);} else if ("list".endsWith(actionIndicator)) {result = list(req, validator);} else if ("delete".endsWith(actionIndicator)) {result = delete(req, validator);} else if ("save".endsWith(actionIndicator)) {boolean isEdit = true;String editIndicator = req.getParameter("entityId");if (Validator.isEmpty(editIndicator))isEdit = false;result = save(req, validator, isEdit);}if (!validator.hasErrors() && result.isRedirect()) {resp.sendRedirect(result.getViewName());} else {req.setAttribute("errors", validator.getErrors());req.getRequestDispatcher(result.getViewName()).forward(req, resp);}}public ActionResult read(HttpServletRequest request, Validator validator) {Comment comment = facilityService.findCommentById(request.getParameter("entityId"));pupulateRequest(request, comment);return new ActionResult("guestbook-modify.jsp");}public ActionResult save(HttpServletRequest request, Validator validator,boolean isEdit) {checkInputErrors(request, validator);saveToDatabase(request, validator, isEdit);return new ActionResult("GuestBook", true);}public ActionResult delete(HttpServletRequest request, Validator validator) {facilityService.deleteComment(request.getParameter("entityId"));return new ActionResult("GuestBook", true);}public ActionResult list(HttpServletRequest request, Validator validator) {String page = request.getParameter("page");int pageNo = 1;if (!Validator.isEmpty(page))pageNo = Integer.parseInt(page);long rowCount = facilityService.getCommentRowCount();Pager pager = new Pager(rowCount, pageNo);List<Comment> comments = facilityService.getComments(pager);List<ProductCategory> categories = productService.getProductCategories(null);request.setAttribute("categories", categories);request.setAttribute("comments", comments);request.setAttribute("pager", pager);request.setAttribute("pageNo", pageNo);return new ActionResult("guestbook.jsp");}private void pupulateRequest(HttpServletRequest request, Comment comment) {request.setAttribute("entityId", Long.toString(comment.getId()));request.setAttribute("reply", comment.getReply());request.setAttribute("content", comment.getContent());request.setAttribute("nickName", comment.getNickName());request.setAttribute("replayTime", Validator.dateToString(comment.getReplyTime()));}private void saveToDatabase(HttpServletRequest request,Validator validator, boolean isEdit) {if (!validator.hasErrors()) {Comment comment;if (!isEdit) {comment = new Comment();comment.setCreateTime(new Date());populateEntity(request, comment);facilityService.saveComment(comment);} else {comment = facilityService.findCommentById(request.getParameter("entityId"));if (!Validator.isEmpty(request.getParameter("reply"))) {comment.setReply(request.getParameter("reply"));comment.setReplyTime(new Date());}facilityService.updateComment(comment);}}}private void checkInputErrors(HttpServletRequest request,Validator validator) {validator.checkRequiredError(new String[] { "content", "nickName" });}private void populateEntity(HttpServletRequest request, Comment comment) {comment.setContent(request.getParameter("content"));comment.setNickName(request.getParameter("nickName"));}}