SSH框架开发起步的最好例子.doc

一、添加商品到购物车l 开发步骤：1) 创建数据库表及进行反向工程2) 创建购物车模型3) 编写DAO 层4) 编写Service 层5) 编写Action 层6) 编写struts 和Spring 配置文件7) 编写JSP 页面具体操作如下：1. 创建数据库表订单表（orders）,包含3 个字段：orderid(订单编号),userid（用户表的关联字段）,orderdate（订单日期）订单项表（orderitem）,包含4 个字段：orderitemid(订单项编号)，orderid(与订单表关联字段)，bookid(与图书表关联字段)，quantity（数量）进行两张表的反向工程，生成响应的POJO 和hbm.xml 文件。2. 创建购物车模型创建购物车模型购物车模型CartCart.java 代码如下：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 层主要的类为BaseDAO 类，IBookDAO 接口和BookDAO 类。在IBookDAO 中定义了getBookById（）方法，通过这个方法可以根据id 号，得到书的信息。BookDAO 具体实现了这个接口。修改IBookDAO.java，加上如下代码：public Book getBookById(Integer bookid);/根据图书号得到图书修改BookDAO.java 实现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 接口中定义getBookById()，根据图书号获得图书,在BookService中实现此方法。修改IBookService.java，加上getBookById()的定义：/根据图书号得到图书public Book getBookById(Integer bookid);修改BookService.java,实现getBookById()方法。public Book getBookById(Integer bookid) / TODO Auto-generated method stubreturn bookDAO.getBookById(bookid);5. Action创建ShoppingAction,通过addToCart()方法，完成将图书放入购物车中。ShoppingAction.java 代码如下：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 中增加名为：addToCart 的Action 代码如下：/addToCart_result.jsp在applicationContext.xml 中增加shoppringAction 的bean 的配置7. 编写JSP 页面修改browseBookPaging.jsp，代码如下：Insert title hereimg src=/bookstore/picture/width=100书名:价格:元数量:input type=hidden value= name=bookid首页a href=browseBookPaging.action?currentPage=上一页a href=browseBookPaging.action?currentPage=下一页a href=browseBookPaging.action?currentPage=尾页当前第页,总共页二、显示购物车开发步骤：l Modell Actionl Struts.xml applicationContext.xmll JSP1. ModelCart 模型中的updateCart 方法用于更新购物车。修改Cart.java 加入下列代码：public void updateCart(Integer bookid,int quantity)Orderitem orderitem=items.get(bookid);orderitem.setQuantity(quantity);items.put(bookid, orderitem);2. ActionShoppingAction 中的UpdateCart 用于完成更新购物车的功能。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 没有变化4. JSP 页面创建showCart.jsp 文件Insert title here您购物车中图书 书 名定 价数 量操 作input type=text name=quantity value= size=4/消费金额:元   对不起,您还没有选购图书!修改index.jsp 加入购物车超链接购物车三、结帐开发步骤：l DAOl Servicel Actionl Struts.xml applicationContext.xmll JSP1. DAO主要涉及的类和接口为IOrderDAO 接口和OrderDAO 类。IOrderDAO 接口中定义了insertOrder 方法,用来将插入到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 层主要的类和接口为接口IOrderService ， 这个接口定义了saveOrder 方法，用于结帐。OrderService 具体实现了这个接口。创建IOrderService.javapackage com.sxjiang.bookstore.service;import com.sxjiang.bookstore.vo.Orders;public interface IOrderService public Orders saveOrder(Orders order);创建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 类的checkOut()完成结帐功能，类图如图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.setOrderd