SSH框架開發(fā)起步的最好例子.doc

.一、添加商品到購物車l 開發(fā)步驟：1) 創(chuàng)建數(shù)據(jù)庫表及進(jìn)行反向工程2) 創(chuàng)建購物車模型3) 編寫DAO 層4) 編寫Service 層5) 編寫Action 層6) 編寫struts 和Spring 配置文件7) 編寫JSP 頁面具體操作如下：1. 創(chuàng)建數(shù)據(jù)庫表訂單表（orders）,包含3 個(gè)字段：orderid(訂單編號),userid（用戶表的關(guān)聯(lián)字段）,orderdate（訂單日期）訂單項(xiàng)表（orderitem）,包含4 個(gè)字段：orderitemid(訂單項(xiàng)編號)，orderid(與訂單表關(guān)聯(lián)字段)，bookid(與圖書表關(guān)聯(lián)字段)，quantity（數(shù)量）進(jìn)行兩張表的反向工程，生成響應(yīng)的POJO 和hbm.xml 文件。2. 創(chuàng)建購物車模型創(chuàng)建購物車模型購物車模型CartCart.java 代碼如下：package com.sxjiang.bookstore.model;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import com.sxjiang.bookstore.vo.Orderitem;public final class Cart protected Map items;public Cart()if(items=null) items=new HashMap();public void addBook(Integer bookid,Orderitem orderitem)if(items.containsKey(bookid)Orderitem _orderitem=items.get(bookid);_orderitem.setQuantity(_orderitem.getOrderitemid()+orderitem.getQuantity();items.put(bookid, _orderitem);elseitems.put(bookid, orderitem);public void updateCart(Integer bookid,int quantity)Orderitem orderitem=items.get(bookid);orderitem.setQuantity(quantity);items.put(bookid, orderitem);public int getTotalPrice()int totalPrice=0;for(Iterator it=items.values().iterator();it.hasNext();)Orderitem orderitem=(Orderitem)it.next();Book book=orderitem.getBook();int quantity=orderitem.getQuantity();totalPrice+=book.getPrice()*quantity;return totalPrice;public Map getItems() return items;public void setItems(Map items) this.items = items;3. DAODAO 層主要的類為BaseDAO 類，IBookDAO 接口和BookDAO 類。在IBookDAO 中定義了getBookById（）方法，通過這個(gè)方法可以根據(jù)id 號，得到書的信息。BookDAO 具體實(shí)現(xiàn)了這個(gè)接口。修改IBookDAO.java，加上如下代碼：public Book getBookById(Integer bookid);/根據(jù)圖書號得到圖書修改BookDAO.java 實(shí)現(xiàn)getBookById()方法public Book getBookById(Integer bookid) / TODO Auto-generated method stubSession session=getSession();Book book=(Book)session.get(Book.class, bookid);session.close();return book;4. Service在IBookService 接口中定義getBookById()，根據(jù)圖書號獲得圖書,在BookService中實(shí)現(xiàn)此方法。修改IBookService.java，加上getBookById()的定義：/根據(jù)圖書號得到圖書public Book getBookById(Integer bookid);修改BookService.java,實(shí)現(xiàn)getBookById()方法。public Book getBookById(Integer bookid) / TODO Auto-generated method stubreturn bookDAO.getBookById(bookid);5. Action創(chuàng)建ShoppingAction,通過addToCart()方法，完成將圖書放入購物車中。ShoppingAction.java 代碼如下：package com.sxjiang.bookstore.action;import java.util.Map;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;import com.sxjiang.bookstore.model.Cart;import com.sxjiang.bookstore.service.IBookService;import com.sxjiang.bookstore.vo.Book;import com.sxjiang.bookstore.vo.Orderitem;public class ShoppingAction extends ActionSupport private Integer bookid;private int quantity;private IBookService bookService;public String addToCart() throws ExceptionBook book=bookService.getBookById(bookid);Orderitem orderitem=new Orderitem();orderitem.setBookid(book.getBookid();orderitem.setQuantity(quantity);Map session=ActionContext.getContext().getSession();Cart cart=(Cart)session.get(cart);if(cart=null)cart=new Cart();cart.addBook(bookid, orderitem);session.put(cart,cart);return SUCCESS;public String updateCart() throws ExceptionMap session=ActionContext.getContext().getSession();Cart cart=(Cart)session.get(cart);cart.updateCart(bookid, quantity);session.put(cart, cart);return SUCCESS;public Integer getBookid() return bookid;public void setBookid(Integer bookid) this.bookid = bookid;public int getQuantity() return quantity;public void setQuantity(int quantity) this.quantity = quantity;public IBookService getBookService() return bookService;public void setBookService(IBookService bookService) this.bookService=bookService;6. 配置struts.xml 和applicationContext.xml在struts.xml 中增加名為：addToCart 的Action 代碼如下：/addToCart_result.jsp在applicationContext.xml 中增加shoppringAction 的bean 的配置7. 編寫JSP 頁面修改browseBookPaging.jsp，代碼如下：Insert title hereimg src=/bookstore/picture/width=100書名:價(jià)格:元數(shù)量:input type=hidden value= name=bookid首頁a href=browseBookPaging.action?currentPage=上一頁a href=browseBookPaging.action?currentPage=下一頁a href=browseBookPaging.action?currentPage=尾頁當(dāng)前第頁,總共頁二、顯示購物車開發(fā)步驟：l Modell Actionl Struts.xml applicationContext.xmll JSP1. ModelCart 模型中的updateCart 方法用于更新購物車。修改Cart.java 加入下列代碼：public void updateCart(Integer bookid,int quantity)Orderitem orderitem=items.get(bookid);orderitem.setQuantity(quantity);items.put(bookid, orderitem);2. ActionShoppingAction 中的UpdateCart 用于完成更新購物車的功能。修改shoppingAction.javapublic String updateCart() throws ExceptionMap session=ActionContext.getContext().getSession();Cart cart=(Cart)session.get(cart);cart.updateCart(bookid, quantity);session.put(cart, cart);return SUCCESS;3. struts.xml applicationContext.xmlstruts.xml/showCart.jspapplicationContext.xml 沒有變化4. JSP 頁面創(chuàng)建showCart.jsp 文件Insert title here您購物車中圖書 書 名定 價(jià)數(shù) 量操 作input type=text name=quantity value= size=4/消費(fèi)金額:元   對不起,您還沒有選購圖書!修改index.jsp 加入購物車超鏈接購物車三、結(jié)帳開發(fā)步驟：l DAOl Servicel Actionl Struts.xml applicationContext.xmll JSP1. DAO主要涉及的類和接口為IOrderDAO 接口和OrderDAO 類。IOrderDAO 接口中定義了insertOrder 方法,用來將插入到orderIOrderDAO.javapackage com.sxjiang.bookstore.dao;import com.sxjiang.bookstore.vo.Orders;public interface IOrderDAO public Orders insertOrder(Orders order);OrderDAO.javapackage com.sxjiang.bookstore.dao.impl;import com.sxjiang.bookstore.dao.BaseDAO;import com.sxjiang.bookstore.dao.IOrderDAO;import com.sxjiang.bookstore.vo.Orders;import org.hibernate.Session;import org.hibernate.Transaction;public class OrderDAO extends BaseDAO implements IOrderDAOpublic Orders saveOrder(Orders order) Session session = getSession();Transaction tx = session.beginTransaction();session.save(order);mit();session.close();return order;2. ServiceService 層主要的類和接口為接口IOrderService ， 這個(gè)接口定義了saveOrder 方法，用于結(jié)帳。OrderService 具體實(shí)現(xiàn)了這個(gè)接口。創(chuàng)建IOrderService.javapackage com.sxjiang.bookstore.service;import com.sxjiang.bookstore.vo.Orders;public interface IOrderService public Orders saveOrder(Orders order);創(chuàng)建OrderService.javapackage org.bookstore.service.impl;import com.sxjiang.bookstore.dao.IOrderDAO;import com.sxjiang.bookstore.service.IOrderService;import com.sxjiang.bookstore.vo.Orders;public class OrderService implements IOrderService private IOrderDAO orderDAO;public void setOrderDAO(IOrderDAO orderDAO) this.orderDAO = orderDAO;public Orders saveOrder(Orders order) return orderDAO.saveOrder(order);3. Action使用ShoppingAction 類的checkOut()完成結(jié)帳功能，類圖如圖6-10 所示。修改ShoppingAction.javapublic String checkout() throws ExceptionMap session=ActionContext.getContext().getSession();User user=(User)session.get(user);Cart cart=(Cart)session.get(cart);if(user=null | cart=null)return ERROR;Orders order=new Orders();order.setOrder