用户模块
要登陆后才能购买，因此我们先写购买模块
设计实体
private String id;
private String username;
private String password;
private String email;
private String cellphone;
private String address;
//各种setter、getter设计数据库表
CREATE TABLE user (
id VARCHAR(40) PRIMARY KEY,
username VARCHAR(20) NOT NULL,
cellphone VARCHAR(20) NOT NULL,
address VARCHAR(40) NOT NULL,
email VARCHAR(30),
password VARCHAR(30) NOT NULL
);编写DAO
/**
* 用户的登录注册模块
* 1：登陆
* 2：注册
* 3：根据id查找具体的用户
*/
public class UserDaoImpl {
public void register(User user) {
QueryRunner queryRunner = new QueryRunner(Utils2DB.getDataSource());
String sql = "INSERT INTO user (id,username,cellphone,address,email,password) VALUES(?,?,?,?,?,?)";
try {
queryRunner.update(sql, new Object[]{user.getId(),user.getUsername(), user.getCellphone(), user.getAddress(), user.getEmail(), user.getPassword()});
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public User login(String username, String password) {
QueryRunner queryRunner = new QueryRunner(Utils2DB.getDataSource());
String sql = "SELECT * FROM user WHERE username = ? AND password=?";
try {
return (User) queryRunner.query(sql, new Object[]{username, password}, new BeanHandler(User.class));
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public User find(String id) {
QueryRunner queryRunner = new QueryRunner(Utils2DB.getDataSource());
String sql = "SELECT * FROM user WHERE id=?";
try {
return (User) queryRunner.query(sql, id, new BeanHandler(User.class));
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
}
测试DAO
public class UserDemo {
UserDaoImpl userDao = new UserDaoImpl();
@Test
public void add() {
User user = new User();
user.setId("1");
user.setUsername("zhong");
user.setPassword("123");
user.setCellphone("10085");
user.setAddress("广州萝岗");
user.setEmail("40368324234234@QQ.com");
userDao.register(user);
}
@Test
public void find() {
String id = "1";
User user = userDao.find(id);
System.out.println(user.getEmail());
}
@Test
public void login() {
String username = "zhong";
String password = "123";
User user = userDao.login(username, password);
System.out.println(user.getAddress());
}
}
抽取DAO
public interface UserDao {
void register(User user);
User login(String username, String password);
User find(String id);
}编写Service
private UserDao userDao = DaoFactory.getInstance().createDao("zhongfucheng.dao.impl.UserDaoImpl", UserDao.class);
public void registerUser(User user) {
userDao.register(user);
}
public User loginUser(String username,String password) {
return userDao.login(username, password);
}
public User findUser(String id) {
return userDao.find(id);
}
前台样式
- head.jsp
<div id="User">
用户名：<input type="text" name="username">
密码：<input type="password" name="password">
<button name="login">登陆</button>
<button name="register">注册</button>
</div>
- head.css
#body {
position: relative;
}
#user {
position: absolute;
margin-top: 130px;
margin-left: 1364px;
}- 效果：
实现登陆注册功能
当点击登陆按钮的时候，把数据带过去给Servlet，让Servlet调用BusinessService方法，实现登陆。注册同理…..因此，我们需要用到JavaScript代码
- head.jsp
<c:if test="${user==null}" >
<div id="User">
用户名：<input type="text" id="username">
密码：<input type="password" id="password">
<button name="login" onclick="login()">登陆</button>
<button name="register" onclick="register()">注册</button>
</div>
</c:if>
<c:if test="${user!=null}" >
<div id="User">
欢迎您：${user.username} <a href="${pageContext.request.contextPath}/UserServlet?method=Logout">注销</a>
</div>
</c:if>
- javaScript代码
<script type="text/javascript">
function login() {
//得到输入框的数据
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
//跳转到相对应的Servlet上
window.location.href = "${pageContext.request.contextPath}/UserServlet?method=login&username=" + username + "&password=" + password;
}
function register() {
//跳转到注册页面
window.location.href = "${pageContext.request.contextPath}/client/register.jsp";
}
</script>- UserServlet
String method = request.getParameter("method");
BussinessServiceImpl service = new BussinessServiceImpl();
if (method.equals("login")) {
try {
//得到页面传递过来的数据
String username = request.getParameter("username");
String password = request.getParameter("password");
User user = service.loginUser(username, password);
request.getSession().setAttribute("user",user);
request.getRequestDispatcher("/client/head.jsp").forward(request, response);
} catch (Exception e) {
request.setAttribute("message", "登陆失败了！");
request.getRequestDispatcher("/message.jsp").forward(request, response);
}
} else if (method.equals("register")) {
try {
//得到JSP传递过来的数据，封装成Bean对象
User user = WebUtils.request2Bean(request, User.class);
user.setId(WebUtils.makeId());
service.registerUser(user);
request.setAttribute("message", "注册成功了！");
} catch (Exception e) {
e.printStackTrace();
request.setAttribute("message", "注册失败了！");
}
request.getRequestDispatcher("/message.jsp").forward(request, response);
} else if (method.equals("Logout")) {
//销毁session
request.getSession().invalidate();
//回到首页
request.getRequestDispatcher("/client/head.jsp").forward(request, response);
}购买模块
在显示图书的时候，顺便添加购买的超链接
<li><a href="#">购买</a></li>设计购物车实体
如果不清楚为什么这样设计，可参考我之前的博文：http://blog.csdn.net/hon_3y/article/details/56481439#t5
- Cart实体
public class Cart {
private Map<String, CartItem> map = new HashMap<>();
private double price;
//提供把商品添加到购物的功能
public void addBook2Cart(Book book) {
//得到对应的购物项
CartItem cartItem = map.get(book.getId());
//如果是null，说明购物车还没有该购物项
if (cartItem == null) {
cartItem = new CartItem();
cartItem.setQuantity(1);
cartItem.setBook(book);
cartItem.setPrice(book.getPrice());
//把购物项加到购物车中
map.put(book.getId(), cartItem);
} else {
//如果购物车有该购物项了，那么将购物项的数量+1
cartItem.setQuantity(cartItem.getQuantity() + 1);
}
}
//购物车的价钱是购物项价钱的总和
public double getPrice() {
double totalPrice = 0;
for (Map.Entry<String, CartItem> me : map.entrySet()) {
CartItem cartItem = me.getValue();
totalPrice += cartItem.getPrice();
}
return totalPrice;
}
public Map<String, CartItem> getMap() {
return map;
}
public void setMap(Map<String, CartItem> map) {
this.map = map;
}
public void setPrice(double price) {
this.price = price;
}
}
设计购物项实体
public class CartItem {
private Book book;
private double price;
private int quantity;
public double getPrice() {
return this.book.getPrice() * this.quantity;
}
public void setPrice(double price) {
this.price = price;
}
public Book getBook() {
return book;
}
public void setBook(Book book) {
this.book = book;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
}处理用户想要买的书籍Servlet
<li><a href="${pageContext.request
.contextPath}/BuyServlet?book_id=${book.id}">购买</a></li>- BuyServlet
BussinessServiceImpl service = new BussinessServiceImpl();
//先检查该用户是否登陆了。
User user = (User) request.getSession().getAttribute("user");
if (user == null) {
request.setAttribute("message", "您还没登陆，请登陆了再来购买");
request.getRequestDispatcher("/message.jsp").forward(request, response);
return ;
}
//如果登陆了...
//得到该用户的购物车
Cart cart = (Cart) request.getSession().getAttribute("cart");
if (cart == null) {
cart = new Cart();
request.getSession().setAttribute("cart", cart);
}
//得到用户想买的书籍
String book_id = request.getParameter("book_id");
Book book = service.findBook(book_id);
//把书籍添加到购物车中
service.buyBook(cart, book);
request.setAttribute("message", "该商品已添加到购物车中");
request.getRequestDispatcher("/message.jsp").forward(request,response);提供显示购物车商品的Servlet
//先判断该用户是否登陆了
User user = (User) request.getSession().getAttribute("user");
if (user == null) {
request.setAttribute("message", "您还没有登陆呢！");
request.getRequestDispatcher("/message.jsp").forward(request, response);
return;
}
//如果登陆了.....
Cart cart = (Cart) request.getSession().getAttribute("cart");
//把该用户的购物车给JSP页面显示
request.setAttribute("cart", cart);
request.getRequestDispatcher("/client/listCart.jsp").forward(request, response);显示购物车的JSP页面
<c:if test="${empty(cart.map)}">
您还没有购买过任何商品哦！！！
</c:if>
<table border="1px">
<c:if test="${!empty(cart.map)}">
<h1>您购物车下有如下的商品：</h1><br>
<tr>
<td>书名：</td>
<td>作者：</td>
<td>数量：</td>
<td>价钱：</td>
</tr>
<c:forEach items="${cart.map}" var="cartItme">
<tr>
<td>${cartItme.value.book.name}</td>
<td>${cartItme.value.book.author}</td>
<td>${cartItme.value.quantity}</td>
<td>${cartItme.value.price}</td>
</tr>
</c:forEach>
</c:if>
</table>效果：
订单模块
在前台用户界面中，当用户要把购物车付款时，应该提供生成订单的超链接….
设计订单实体
订单应该包含id,收货人信息,下单的时间，订单的总价,订单的状态【有无发货】..而不应该包含商品的信息的。商品的信息用一个专门的”订单项“来表示
一个订单对应多个订单项，这是一对多的关系！
private String id;
//下单的时间、日期、状态
private Date date;
private double price;
private boolean state;
//一个用户可以有多个订单，把用户记住
private String user_id;
//一个订单中有多个订单项
private Set<OrderItem> items = new HashSet<>();
//各种的setter和getter
设计订单项实体
private String id;
//一本书对应多个订单项，订单项一定是由书组成，记住书
private String book_id;
private double price;
private int quantity;
//各种的setter和getter设计数据库表
- 订单表
mysql不能创建名为”order”的表，后边加个s就可以
CREATE TABLE orders (
id VARCHAR(40) PRIMARY KEY,
date DATE NOT NULL,
user_id VARCHAR(40) NOT NULL,
state BOOLEAN,
price DOUBLE,
CONSTRAINT user_id_FK FOREIGN KEY (user_id) REFERENCES user (id)
);
- 订单项表：
CREATE TABLE orderItem (
id VARCHAR(40) PRIMARY KEY,
price DOUBLE,
quantity INT,
order_id VARCHAR(40) ,
book_id VARCHAR(40) ,
CONSTRAINT order_id_FK FOREIGN KEY (order_id) REFERENCES orders (id),
CONSTRAINT book_id_FK FOREIGN KEY (book_id) REFERENCES book (id)
);
- 表之间的结构：
设计Dao
public class OrderDaoImpl implements zhongfucheng.dao.OrderDao {
@Override
public void addOrder(Order order) {
QueryRunner queryRunner = new QueryRunner(Utils2DB.getDataSource());
String sql1 = "INSERT INTO orders(id,ordertime,user_id,state,price) VALUES(?,?,?,?,?)";
try {
//订单的基本信息
queryRunner.update(sql1, new Object[]{order.getId(), order.getOrdertime(), order.getUser_id(), order.isState(), order.getPrice()});
//订单项的信息
String sql2 = "INSERT INTO orderItem(id,price,quantity,order_id,book_id) VALUES(?,?,?,?,?)";
Set<OrderItem> items = order.getItems();
for (OrderItem item : items) {
queryRunner.update(sql2, new Object[]{item.getId(), item.getPrice(), item.getQuantity(), item.getOrder_id(), item.getBook_id()});
}
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
@Override
public Order findOrder(String id) {
QueryRunner queryRunner = new QueryRunner(Utils2DB.getDataSource());
Order order;
try {
//找出订单的基本信息
String sql = "SELECT * FROM orders WHERE id=?";
order = (Order) queryRunner.query(sql, new BeanHandler(Order.class), new Object[]{id});
//找出订单的所有订单项
String sql2 = "SELECT * FROM orderItem WHERE order_id=?";
List<OrderItem> list = (List<OrderItem>) queryRunner.query(sql2, new BeanListHandler(OrderItem.class), new Object[]{order.getId()});
System.out.println("这是数据库拿到的list集合："+list.size());
//将所有订单项装到订单里边
order.getItems().addAll(list);
System.out.println("这是数据库拿到的"+order.getItems().size());
//找出该订单是属于哪一个用户的
String sql3 = "SELECT * FROM orders o,user u WHERE o.user_id=u.id AND o.id=? ";
User user = (User) queryRunner.query(sql3, new BeanHandler(User.class), new Object[]{order.getId()});
order.setUser_id(user.getId());
return order;
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
//更新订单的状态
public void updateState(String id) {
QueryRunner queryRunner = new QueryRunner(Utils2DB.getDataSource());
String sql = "UPDATE orders SET state=? WHERE id=?";
try {
queryRunner.update(sql, new Object[]{true, id});
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
//查看已经发货或没发货的订单信息
public List<Order> getAllOrder(boolean state) {
QueryRunner queryRunner = new QueryRunner(Utils2DB.getDataSource());
String sql = "SELECT * FROM orders WHERE state=? ";
try {
return (List<Order>) queryRunner.query(sql, new BeanListHandler(Order.class), new Object[]{state});
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
//通过用户的id查找用户的订单，可能不止一个
public List<Order> findUserOrder(String user_id) {
QueryRunner queryRunner = new QueryRunner(Utils2DB.getDataSource());
String sql = "SELECT * FROM orders WHERE user_id=? ";
try {
return List<Order> queryRunner.query(sql, new BeanHandler(Order.class), new Object[]{user_id});
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
}
抽取成DAO接口
public interface OrderDao {
void addOrder(Order order);
Order findOrder(String user_id);
List<Order> getAllOrder(boolean state);
void updateState(String user_id);
List<Order> findUserOrder(String user_id);
}
BussinessService
private OrderDao orderDao = DaoFactory.getInstance().createDao("zhongfucheng.dao.impl.OrderDaoImpl", OrderDao.class);
public void createOrder(Cart cart, User user) {
//订单的基本信息
String order_id = WebUtils.makeId();
Order order = new Order();
order.setId(order_id);
order.setPrice(cart.getPrice());
order.setOrdertime(new Date());
order.setState(false);
order.setUser_id(user.getId());
//订单项的基本信息
//得到每个购物项，购物项就作为订单项
for (Map.Entry<String, CartItem> me : cart.getMap().entrySet()) {
OrderItem orderItem = new OrderItem();
CartItem cartItem = me.getValue();
orderItem.setId(WebUtils.makeId());
orderItem.setPrice(cartItem.getPrice());
orderItem.setBook_id(cartItem.getBook().getId());
orderItem.setQuantity(cartItem.getQuantity());
orderItem.setOrder_id(order_id);
order.getItems().add(orderItem);
}
orderDao.addOrder(order);
}
public Order findOrder(String user_id) {
return orderDao.findOrder(user_id);
}
public List<Order> getAllOrder(boolean state) {
return orderDao.getAllOrder(state);
}
public void sendOutOrder(String id) {
orderDao.updateState(id);
}
public List<Order> findUserOrder(String user_id) {
return orderDao.findUserOrder(user_id);
}
生成订单的Servlet
BussinessServiceImpl service = new BussinessServiceImpl();
//检查该用户的购物车是否有商品
Cart cart = (Cart) request.getSession().getAttribute("cart");
if (cart == null) {
request.setAttribute("message", "您购物车没有商品，无法生成订单");
request.getRequestDispatcher("/message.jsp").forward(request, response);
return;
}
//如果有商品，得到当前用户
User user = (User) request.getSession().getAttribute("user");
service.createOrder(cart, user);
request.setAttribute("message", "订单已经生成了，准备好钱来收货把");
request.getRequestDispatcher("/message.jsp").forward(request, response);
return;
用户查询自己的订单Servlet
<a href="${pageContext.request.contextPath}/LookOrder" target="body">查看订单</a>
BussinessServiceImpl service = new BussinessServiceImpl();
//检查该用户是否登陆了
User user = (User) request.getSession().getAttribute("user");
if (user == null) {
request.setAttribute("message", "您还没登陆，等您登陆了再来看把");
request.getRequestDispatcher("/message.jsp").forward(request, response);
return;
}
//用户登陆了！
Order order = service.findUserOrder(user.getId());
//交给相对应的JSP 显示
request.setAttribute("order", order);
request.setAttribute("user",user);
request.getRequestDispatcher("/client/listOrder.jsp").forward(request, response);
return ;显示订单数据的JSP
<c:if test="${order==null}">
您还没有下过任何订单！！
</c:if>
<c:if test="${order!=null}">
<table border="1px">
<tr>
<td>下单人：</td>
<td>订单时间</td>
<td>订单状态</td>
<td>订单价钱</td>
</tr>
<tr>
<td>${user.username}</td>
<td>${order.ordertime}</td>
<td>${order.state==false?"未发货":"已发货"}</td>
<td>${order.price}</td>
</tr>
</table>
</c:if>效果：
后台查询订单的状况Servlet
<a href="${pageContext.request.contextPath}/OrderServlet?state=false" target="body">待处理订单</a><br>
<a href="${pageContext.request.contextPath}/OrderServlet?state=true" target="body">已发货订单</a><br>
BussinessServiceImpl service = new BussinessServiceImpl();
String state = request.getParameter("state");
if (state.equals("true")) {
List<Order> list = service.getAllOrder(true);
request.setAttribute("list",list);
} else if (state.equals("false")) {
List<Order> list = service.getAllOrder(false);
request.setAttribute("list", list);
}
request.getRequestDispatcher("/background/listOrder.jsp").forward(request, response);显示订单状况的JSP
<c:if test="${empty(list)}">
还没有任何订单哦！
</c:if>
<c:if test="${!empty(list)}">
<table border="1px">
<tr>
<td>下单人：</td>
<td>订单时间</td>
<td>订单状态</td>
<td>订单价钱</td>
<td>操作</td>
</tr>
<c:forEach items="${list}" var="order">
<tr>
<td>${order.user_id}</td>
<td>${order.ordertime}</td>
<td>${order.state==false?"未发货":"已发货"}</td>
<td>${order.price}</td>
<td>
<a href="${pageContext.request.contextPath}/orderItemServlet?order_id=${order.id}">查看详细信息</a>
<a href="#">删除</a>
</td>
</tr>
</c:forEach>
</table>
</c:if>
查看具体订单的详细信息Servlet
BussinessServiceImpl service = new BussinessServiceImpl();
//得到用户想要查看详细信息的表单
String order_id = request.getParameter("order_id");
Order order = service.findOrder(order_id);
//将该order对象给相对应的JSP显示
request.setAttribute("order", order);
request.getRequestDispatcher("/background/listDetail.jsp").forward(request, response);
查看具体订单的详细信息JSP
<table border="1px">
<tr>
<td>书籍的编号</td>
<td>价钱</td>
<td>数量</td>
<td>操作</td>
</tr>
<c:forEach items="${order.items}" var="item">
<tr>
<td>${item.book_id}</td>
<td>${item.price}</td>
<td>${item.quantity}</td>
<td><a href="${pageContext.request.contextPath}/SendOutServlet?id=${order.id}">发货</a></td>
</tr>
</c:forEach>
</table>
处理发货的Servlet
BussinessServiceImpl service = new BussinessServiceImpl();
String id = request.getParameter("id");
service.sendOutOrder(id);
request.setAttribute("message", "已发货！");
request.getRequestDispatcher("/message.jsp").forward(request, response);
return;
