Java怎么实现仿天猫网上商城

小编给大家分享一下Java怎么实现仿天猫网上商城，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

一、项目简述

功能：

前台：

* 用户模块

* 分类模块

* 商品模块

* 购物车模块

* 订单模块

后台：

* 管理员模块

* 分类管理模块

* 商品管理模块

* 订单模块

二、项目运行

环境配置： Jdk1.8 + Tomcat8.5 + mysql + Eclispe (IntelliJ IDEA,Eclispe,MyEclispe,Sts 都支持)

项目技术： JSP + C3P0+ Servlert + html+ css + JavaScript + JQuery + Ajax + Fileupload等等。

基础信息操作代码:

基础信息操作: public abstract class BaseBackServlet extends HttpServlet {     /* 添加 */    public abstract String add(HttpServletRequest request, HttpServletResponse response, Page page);    /* 删除 */    public abstract String delete(HttpServletRequest request, HttpServletResponse response, Page page);    /* 更新 */    public abstract String update(HttpServletRequest request, HttpServletResponse response, Page page);    /* 修改 */    public abstract String edit(HttpServletRequest request, HttpServletResponse response, Page page);    /* 显示 */    public abstract String list(HttpServletRequest request, HttpServletResponse response, Page page);     protected CategoryDAO categoryDAO = new CategoryDAO();    protected OrderDAO orderDAO = new OrderDAO();    protected OrderItemDAO orderItemDAO = new OrderItemDAO();    protected ProductDAO productDAO = new ProductDAO();    protected ProductImageDAO productImageDAO = new ProductImageDAO();    protected PropertyDAO propertyDAO = new PropertyDAO();    protected PropertyValueDAO propertyValueDAO = new PropertyValueDAO();    protected ReviewDAO reviewDAO = new ReviewDAO();    protected UserDAO userDAO = new UserDAO();     @Override    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        try{            /* 获取分页信息 */            int start = 0;            int count = 5;            try{                start = Integer.parseInt(req.getParameter("page.start"));                count = Integer.parseInt(req.getParameter("page.count"));            } catch(Exception e) {             }             Page page = new Page(start, count);             /* 借助反射，调用对应的方法 */            String method = (String)req.getAttribute("method");            Method m = this.getClass().getMethod(method, HttpServletRequest.class, HttpServletResponse.class, Page.class);            String redirect = m.invoke(this, req, resp, page).toString();             /* 根据方法的返回值，进行相应的客户端、服务端跳转，或仅输出字符串 */            if(redirect.startsWith("@")){                resp.sendRedirect(redirect.substring(1));            } else if(redirect.startsWith("%")){                resp.getWriter().print(redirect.substring(1));            } else {                req.getRequestDispatcher(redirect).forward(req, resp);            }        } catch (NoSuchMethodException e) {            e.printStackTrace();        } catch (IllegalAccessException e) {            e.printStackTrace();        } catch (InvocationTargetException e) {            e.printStackTrace();        }    }     public InputStream parseUpload(HttpServletRequest request, Map params){        InputStream is = null;        try{            DiskFileItemFactory factory = new DiskFileItemFactory();            ServletFileUpload upload = new ServletFileUpload(factory);            //设置上传的文件大小限制为10M            factory.setSizeThreshold(1024 * 1024);             List items = upload.parseRequest(request);            Iterator iter = items.iterator();             while(iter.hasNext()){                FileItem item = (FileItem) iter.next();                if(!item.isFormField()){                    //获取上传文件的输入流                    is = item.getInputStream();                } else {                    String paramName = item.getFieldName();                    String paramValue = item.getString();                    paramValue = new String(paramValue.getBytes("ISO-8859-1"), "UTF-8");                    params.put(paramName, paramValue);                }            }         } catch (FileUploadException e) {            e.printStackTrace();        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return is;    } }

用户信息操作代码:

用户信息操作: public class UserServlet extends BaseBackServlet {     @Override    public String add(HttpServletRequest request, HttpServletResponse response, Page page) {        System.out.println("调用了 UserServlet add方法");        return null;    }     @Override    public String delete(HttpServletRequest request, HttpServletResponse response, Page page) {        System.out.println("调用了 UserServlet delete方法");         int id = Integer.parseInt(request.getParameter("id"));        userDAO.delete(id);        return "@admin_user_list";    }     @Override    public String update(HttpServletRequest request, HttpServletResponse response, Page page) {        System.out.println("调用了 UserServlet update方法");         Map params = new HashMap<>();        InputStream is = super.parseUpload(request, params);        System.out.println(params);         int id = Integer.parseInt(params.get("id"));        String password = params.get("password");         User user = userDAO.get(id);        user.setPassword(password);         userDAO.update(user);         return "@admin_user_list";    }     @Override    public String edit(HttpServletRequest request, HttpServletResponse response, Page page) {        System.out.println("调用了 UserServlet edit方法");         int id = Integer.parseInt(request.getParameter("id"));        User u = userDAO.get(id);         request.setAttribute("u", u);         return "admin/editUser.jsp";    }     @Override    public String list(HttpServletRequest request, HttpServletResponse response, Page page) {        System.out.println("调用了 UserServlet list方法");         List us = userDAO.list(page.getStart(), page.getCount());        int total = userDAO.getTotal();        page.setTotal(total);         request.setAttribute("us", us);        request.setAttribute("page", page);         return "admin/listUser.jsp";    }}

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