当当网项目第一期小结

   通过一个星期的拼搏，总算把当当网第一期给完成了。通过这些天努力以下是我的一个小结：

   第一天主要的任务是完成，显示导航条第一条的图书栏目，点击图书导航条，列出图书下的二级和三级目录。实现过程是：把二级和三级目录存入数据库，用hibernate来实现对数据库的读取。写好持久类domain，dao，首先在domain中写入一条：private list<?> subCategory;表示list中存入本目录一下的子目录，在配置文件中应写入：

    <list name="subCategory" lazy="false">//不能延迟加载，目录信息应该当前显示

  <key  column="parent_id"/>

<list-index  column="turn" base="0"/>//

<one-to-many class="bookCategory"/>

</list>

  这样就可以任意读取每一级目录，入parent_id=0，取得第一级目录及他的所有子目录，jsp页面就不作说明了。显示目录的同时还要显示分页查询，分页查询的DAO为：package org.whatisjava.dangdang.dao;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.TreeMap;import org.hibernate.Query;import org.hibernate.Session;import org.whatisjava.dangdang.domain.Book;import org.whatisjava.dangdang.session.HibernateSessionFactory;public class ListBookDaoImpl implements ListBookDao{private Map queryList=new HashMap();private static final String hql1="from Book b where b.categoryId=?";public ListBookDaoImpl() {this.initQueryList();}private void initQueryList(){queryList.put(ORDER_DEFAULT, "from Book b where b.categoryId=? order by b.addTime");queryList.put(ORDER_PRICE_ASC,"from Book p where p.categoryId=? order by p.dangPrice asc");queryList.put(ORDER_PRICE_DESC,"from Book p where p.categoryId=? order by p.dangPrice desc");queryList.put(ORDER_PUBLISHTIME_ASC,"from Book p where p.categoryId=? order by p.publishTime asc");queryList.put(ORDER_PUBLISHTIME_DESC,"from Book p where p.categoryId=? order by p.publishTime desc");queryList.put(ORDER_ADDTIME_ASC,"from Book p where p.categoryId=? order by p.addTime asc");queryList.put(ORDER_ADDTIME_DESC,"from Book p where p.categoryId=? order by p.addTime desc");}public Map getOrderOptions() {Map map=new TreeMap();map.put(ORDER_DEFAULT, "book.order.default");map.put(ORDER_PRICE_ASC, "book.order.price.asc");map.put(ORDER_PRICE_DESC,"book.order.price.desc");map.put(ORDER_PUBLISHTIME_ASC,"book.order.publishTime.asc");map.put(ORDER_PUBLISHTIME_DESC,"book.order.publishTime.desc");map.put(ORDER_ADDTIME_ASC, "book.order.addTime.asc");map.put(ORDER_ADDTIME_DESC, "book.order.addTime.desc");return map;}public List<?> findAllBook(int categoryId, int page, int rows, int orderBy) {Session s=HibernateSessionFactory.getSession();Query query=s.createQuery((String) queryList.get(orderBy)).setInteger(0, categoryId);query.setFirstResult((page-1)*rows);query.setMaxResults(rows);List list=query.list();s.close();return list;}@SuppressWarnings("unchecked")public int findAllPages(int categoryId, int rows) {Session s=HibernateSessionFactory.getSession();List<Book> list=s.createQuery(hql1).setLong(0, categoryId).list();int k=list.size()/rows;s.close();if(list.size()%rows==0){return k;}else{return k+1;}}public int findAllBooks(int categoryId) {Session s=HibernateSessionFactory.getSession();List list=s.createQuery(hql1).setInteger(0, categoryId).list();s.close();return list.size();}}

   第二天，实现登陆和注册的功能，要求，注册时要进行服务器和客服端都实现验证，注册后应向用户注册时输入的邮箱发一个邮箱验证码也就是激活码。登陆时必须填写邮箱和密码，且邮箱激活后才能用，如果没有激活就转到他的邮箱去激活。

   具体实现：注册表单填写，主要点为邮箱验证，可以通过验证框架来实现，但框架只能验证格式，不能验证邮箱是否已经被注册，所有在注册action中应该先进行此判断。客服端的验证可以通过JavaScript来直接访问服务器实现。邮箱验证码可以通过UUID来生成，但发往邮箱是应该存入数据库，在从数据库读取激活码，和用户的id，这样当激活码发回是就知道是哪用户发回的了，格式可为：激活码+id。用户登录，一现判断用户输入的邮箱和密码是否正确，不正确就重输，正确就在判断激活码是否被激活，没有激活就转到激活码页面，激活就可以登录。

  第三天，实现页头显示：但登陆成功后显示：你好XX，欢迎来到当当网，登出。没有登录时显示：你好，欢迎来到当当网 注册|登录。

在登录成功是分别在cookie和session中加入用户信息，当点击‘登出’是，删除cookie和session中的内容。cookie中添加和删除的代码为：package org.whatisjava.dangdang.util;import java.io.UnsupportedEncodingException;import java.net.URLDecoder;import java.net.URLEncoder;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.log4j.Logger;public class CookieUtil {private static final int MAXAGE=60*60*24*15;private static final String PATH="/dangdang";private static final Logger logger=Logger.getLogger(CookieUtil.class);public static void addCookie(HttpServletResponse response,String key,String value) throws UnsupportedEncodingException{String value1=URLEncoder.encode(value, "utf-8");Cookie cookie=new Cookie(key,value1);cookie.setMaxAge(MAXAGE);cookie.setPath(PATH);response.addCookie(cookie);}public static void deleteCookie(HttpServletResponse response,String key){Cookie cookie=new Cookie(key,"");cookie.setMaxAge(0);cookie.setPath(PATH);response.addCookie(cookie);}public static String findCookie(HttpServletRequest request,String key) throws UnsupportedEncodingException{Cookie[] cookie=request.getCookies();if(cookie!=null){for(Cookie c:cookie){String key1=c.getName();if(key.equals(key1)){String s=c.getValue();String value=URLDecoder.decode(s,"utf-8");logger.debug(value);return value;}}}return null;}}

   第四天，实现购物车的功能，介绍下购物车的功能，显示商品信息：名称，定价，当当价，数量。删除功能，删除后可以还原，更改数量。

商品条目信息封装在CartItem中，如 package org.whatisjava.dangdang.domain;import java.io.Serializable;public class CartItem implements Serializable{private Product product;private int number;private boolean isDrop=false;public Product getProduct() {return product;}public void setProduct(Product product) {this.product = product;}public int getNumber() {return number;}public void setNumber(int number) {this.number = number;}public boolean isDrop() {return isDrop;}public void setDrop(boolean isDrop) {this.isDrop = isDrop;}public CartItem() {super();}public CartItem(Product product, int number, boolean isDrop) {super();this.product = product;this.number = number;this.isDrop = isDrop;}}

购物车类：package org.whatisjava.dangdang.domain;import java.io.*;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;import org.apache.log4j.Logger;import org.whatisjava.dangdang.dao.DangDangDaoFactory;public class Cart implements Serializable{private static Logger logger = Logger.getLogger(Cart.class);private Integer userId;private HashMap<Integer, CartItem> items;public Cart(Integer userId) {this.userId = userId;items = new HashMap<Integer, CartItem>();}public Integer getUserId() {return userId;}public boolean addItem(Integer productId) throws Exception {if (!items.containsKey(productId)) {Product p=DangDangDaoFactory.getProductDao().findProductById(productId);if(p!=null){CartItem item=new CartItem();item.setDrop(false);item.setProduct(p);item.setNumber(1);items.put(productId, item);return true;}}else{CartItem item=items.get(productId);item.setNumber(item.getNumber()+1);items.remove(productId);items.put(productId, item);return true;}return false;}/** * * @param productId * @param num * @return */public boolean updateNum(Integer productId, int num) {CartItem item=items.get(productId);if(!item.isDrop()){item.setNumber(num);items.remove(productId);items.put(productId, item);}return false;}/** * * @param productId * @return */public boolean drop(Integer productId) {CartItem item=items.get(productId);item.setDrop(true);item.setNumber(1);items.put(productId, item);return true;}/** * * @param productId * @return */public boolean recovery(Integer productId) {CartItem item=items.get(productId);item.setDrop(false);items.put(productId, item);return true;}/** * */public void clear() {items.clear();}/** * 鎶婅喘鐗╄溅鐨勪俊鎭浆鎹负瀛楃涓诧紝鐢ㄤ簬Cookie瀛樺劜 * @return * @throws UnsupportedEncodingException */public String serialize() {logger.debug(items);Iterator<Integer> it = items.keySet().iterator();StringBuffer sb=new StringBuffer();sb.append(this.userId+"|[");if(items.isEmpty()){sb.append("0]");}else{while(it.hasNext()){Integer productId=it.next();CartItem item=items.get(productId);sb.append("/"+productId+";"+item.getNumber()+";"+item.isDrop());}sb.append("]");}return sb.toString();}/** * * @param content * @throws DaoException * @throws UnsupportedEncodingException */public void load(String content) {if(content!=null&&!content.contains("[0]")){Integer userId=Integer.parseInt(content.substring(0, content.indexOf("|")));this.userId=userId;System.out.println(userId);items.clear();String s=content.substring(content.indexOf("[")+2, content.lastIndexOf("]"));System.out.println(s);String[] temp=null;if(s.contains("/")){ temp=s.split("/");}else{temp=new String[1];temp[0]=s;} for(int i=0;i<temp.length;i++){ if(temp[i]!=null){ String[] con=temp[i].split(";"); Integer productId=Integer.parseInt(con[0].trim()); Integer number=Integer.parseInt(con[1]); Boolean isDrop=Boolean.parseBoolean(con[2]); Product p=DangDangDaoFactory.getProductDao().findProductById(productId); CartItem item=new CartItem(p,number,isDrop); items.put(productId, item); } } logger.debug(items);}}/** * * @return */public boolean isEmpty() {return items.isEmpty();}/** * * @return */public List<CartItem> getItems() {List<CartItem> list = new ArrayList<CartItem>();Iterator<Integer> it = items.keySet().iterator();while (it.hasNext()) {CartItem item = items.get(it.next());if (!item.isDrop()) {list.add(item);}}return list;}/** * * @return */public List<CartItem> getDropItems() {List<CartItem> list = new ArrayList<CartItem>();Iterator<Integer> it = items.keySet().iterator();while (it.hasNext()) {CartItem item = items.get(it.next());if (item.isDrop()) {list.add(item);}}return list;}/** * * @return */public double getTotalPrice() {Iterator<Integer> it = items.keySet().iterator();double price=0;while(it.hasNext()){CartItem item=items.get(it.next());if(!item.isDrop())price+=item.getNumber()*item.getProduct().getFixedPrice();}return price;}/** * * @return */public double getDangPrice() {Iterator<Integer> it = items.keySet().iterator();double price=0;while(it.hasNext()){CartItem item=items.get(it.next());if(!item.isDrop())price+=item.getNumber()*item.getProduct().getDangPrice();}return price;}}

购物车信息必须存入cookie和session中。以上一个星期的工作