网上书店(struts2+hibernate3.2+Mysql)

package org.web; import java.util.ArrayList; import java.util.Date; import java.util.Enumeration; import java.util.HashMap; import java.util.Hashtable; import java.util.List; import java.util.ListIterator; import java.util.Map; import org.apache.struts2.interceptor.SessionAware; import org.dao.IBookDao; import org.dao.IOrderDao; import org.dao.impl.BookDaoImpl; import org.dao.impl.OrderDaoImpl; import org.model.Bookinfo; import org.model.Order; import org.model.Userinfo; import org.web.interceptor.AuthenticationInterceptor; import com.opensymphony.xwork2.ActionSupport; public class CartAction extends ActionSupport implements SessionAware{ //实例化dao IBookDao dao = new BookDaoImpl(); IOrderDao orderDao = new OrderDaoImpl(); private Map sessionMap = new HashMap(); private Integer bookid; private String address; private String postcode; private List<Bookinfo> books; private Order order; private Integer orderID; //把书添加到购物车 public String add()throws Exception{ Bookinfo book = dao.getByID(bookid); //从session中取出list books = (List)sessionMap.get("cart"); if(books==null){ books = new ArrayList<Bookinfo>(); } books.add(book); //存到session中 sessionMap.put("cart", books); return "add"; } //浏览购物车 public String view()throws Exception{ //从购物车取出所有的书 books = (List)sessionMap.get("cart"); //从登录用户会话中提取用户注册时候的地址和邮编 Userinfo user = (Userinfo)sessionMap.get(AuthenticationInterceptor.USER_SESSION_KEY); if (user!=null){ setAddress(user.getAddress()); setPostcode(user.getPostcode()); } return "view"; } //生成订单 public String newOrder()throws Exception{ books = (List)sessionMap.get("cart"); // 将一份订单中的相同书籍记录合并成一条，并使数量加1 Hashtable result = combineBook(books); // 将订单写入数据库 Enumeration enu = result.keys(); // 循环合并记录后的哈希表 while (enu.hasMoreElements()) { Order order = new Order(); order.setAddress(address); order.setPostcode(postcode); //设置状态为已付款 order.setStatus((short)1); order.setOrderdate(new Date(System.currentTimeMillis())); Userinfo user = (Userinfo)sessionMap.get(AuthenticationInterceptor.USER_SESSION_KEY); //设置哪个用户下的订单 order.setUserinfo(user); //以下三行代码获得合并数量后的订单书本数量 Integer bookid = (Integer) enu.nextElement(); Integer number = (Integer) result.get(bookid); order.setNumber(number.shortValue()); //getBookinfo方法:将book列表中,根据bookid返回符合的book记录 //设置订单是哪本书 order.setBookinfo(getBookinfo(books,bookid)); orderDao.save(order); } //结帐后清空购物车 sessionMap.remove("cart"); return SUCCESS; } /** * 将book列表中,根据bookid返回符合的book记录 * @param booklist * @param bookid * @return */ private Bookinfo getBookinfo(List<Bookinfo> booklist,Integer bookid){ for (Bookinfo book: booklist){ //如果存在相等的bookid，返回这个book对象. if (book.getId().equals(bookid)) return book; } return null; } /** * 将一份订单中的相同书籍记录合并成一条，并使数量加1 * @param books * @return */ private Hashtable combineBook(List books) { ListIterator iter = books.listIterator(); //构造一个哈希表,以book的id为键，值为book的数量 Hashtable result = new Hashtable(); while (iter.hasNext()) { Bookinfo book = (Bookinfo) iter.next(); if (result.get(book.getId()) == null) { //第一次放入,数量初始化为1 result.put(book.getId(), new Integer(1)); } else { Integer now = (Integer) result.get(book.getId()); result.remove(book.getId()); //第二次以上放入,数量为上一次统计的数量加一 result.put(book.getId(), new Integer(now.intValue() + 1)); } } return result; } public String viewOrder()throws Exception{ order = orderDao.getByID(orderID); return "order"; } public Integer getBookid() { return bookid; } public void setBookid(Integer bookid) { this.bookid = bookid; } public List<Bookinfo> getBooks() { return books; } public void setBooks(List<Bookinfo> books) { this.books = books; } public void setSession(Map map) { this.sessionMap = map; } public Map getSessionMap() { return sessionMap; } public void setSessionMap(Map sessionMap) { this.sessionMap = sessionMap; } public String getPostcode() { return postcode; } public void setPostcode(String postcode) { this.postcode = postcode; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public Order getOrder() { return order; } public void setOrder(Order order) { this.order = order; } public Integer getOrderID() { return orderID; } public void setOrderID(Integer orderID) { this.orderID = orderID; } }