Java 项目控制层测试
登录
代码如下
package net.lh.shop.servlet;
/**
* 功能：登录处理类
* 作者：刘浩
* 日期：2019年12月9日
*/
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.lh.shop.bean.User;
import net.lh.shop.service.UserService;
@WebServlet("/login")
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置请求对象的字符编码l
request.setCharacterEncoding("utf-8");
// 获取会话对象
HttpSession session = request.getSession();
// 获取用户名
String username = request.getParameter("username");
// 获取密码
String password = request.getParameter("password");
// 定义用户服务对象
UserService userService = new UserService();
// 执行登录方法，返回用户实体
User user = userService.login(username, password);
// 判断用户登录是否成功
if (user != null) {
// 设置session属性
session.setMaxInactiveInterval(5 * 60);
session.setAttribute("username", username);
session.removeAttribute("loginMsg");
// 根据用户权限跳转到不同页面
if (user.getPopedom() == 0) {
System.out.println("用户登录成功，进入后台管理！");
response.sendRedirect(request.getContextPath() + "/backend/management.jsp");
} else if (user.getPopedom() == 1) {
System.out.println("用户登录成功，进入前台显示类别！");
response.sendRedirect(request.getContextPath() + "/showCategory");
}
} else {
System.out.println("用户名或密码错误，用户登录失败！");
// 设置session属性loginMsg
session.setAttribute("loginMsg", "用户名或密码错误！");
response.sendRedirect(request.getContextPath() + "/login.jsp");
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
测试
管理员登录
普通用户登录
登录失败
注销
代码如下
```java
package net.lh.shop.servlet;
/**
* 功能：注销处理类
* 作者：刘浩
* 日期：2019年12月9日
*/
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/logout")
public class LogoutServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 让session失效
request.getSession().invalidate();
// 重定向到登录页面
System.out.print("用户注销成功！");
response.sendRedirect(request.getContextPath() + "/login.jsp");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
测试注销要先登录
输入 localhost：8080/simonshop/logout
## 注册
```java
```java
package net.lh.shop.servlet;
/**
* 功能：处理用户注册
* 作者：刘浩
* 日期：2019年12月5日
*/
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLEncoder;
import java.sql.Timestamp;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.lh.shop.bean.User;
import net.lh.shop.service.UserService;
@WebServlet("/register")
public class RegisterServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置请求对象的字符编码
request.setCharacterEncoding("utf-8");
// 获取session对象
HttpSession session = request.getSession();
// 获取用户名
String username = request.getParameter("username");
// 获取密码
String password = request.getParameter("password");
// 获取电话号码
String telephone = request.getParameter("telephone");
// 设置注册时间（时间戳对象）
Timestamp registerTime = new Timestamp(System.currentTimeMillis());
// 设置用户为普通用户
int popedom = 1;
// 创建用户对象
User user = new User();
// 设置用户对象信息
user.setUsername(username);
user.setPassword(password);
user.setTelephone(telephone);
user.setRegisterTime(registerTime);
user.setPopedom(popedom);
// 创建UserService对象
UserService userService = new UserService();
// 调用UserService对象的注册方法
int count = userService.addUser(user);
// 判断是否注册成功
if (count > 0) {
// 设置session属性
session.setAttribute("registerMsg", "恭喜，注册成功！");
// 重定向到登录页面
response.sendRedirect(request.getContextPath() + "/login.jsp");
//在控制台输出测试信息
System.out.println("恭喜，注册成功，跳转到登录页面！");
} else {
// 设置session属性
session.setAttribute("registerMsg", "遗憾，注册失败！");
// 重定向到注册页面
response.sendRedirect(request.getContextPath() + "/frontend/register.jsp");
//在控制台输出测试信息
System.out.println("遗憾，注册失败，跳转到注册页面！");
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
注册失败
### 显示商品类
```java
package net.lh.shop.servlet;
/**
* 功能：显示类别控制程序
* 作者：刘浩
* 日期：2019年12月9日
*/
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.lh.shop.bean.Category;
import net.lh.shop.service.CategoryService;
@WebServlet("/showCategory")
public class ShowCategoryServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 创建类别服务对象
CategoryService categoryService = new CategoryService();
// 获取全部商品类别
List categories = categoryService.findAllCategories();
// 获取session对象
HttpSession session = request.getSession();
// 把商品类别列表以属性的方式保存到session里
session.setAttribute("categories", categories);
// 重定向到显示商品类别页面（showCategory.jsp）
response.sendRedirect(request.getContextPath() + "/frontend/showCategory.jsp");
//服务器端控制台输出测试信息
for (Category category : categories){
System.out.println(category);
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
显示商品名
package net.lh.shop.servlet;
/**
* 功能：显示商品列表的控制程序
* 通过业务层访问后台数据，
* 然后将数据返回给前台页面
* 作者：刘浩
* 日期：2019年12月9日
*/
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.lh.shop.bean.Product;
import net.lh.shop.service.CategoryService;
import net.lh.shop.service.ProductService;
@WebServlet("/showProduct")
public class ShowProductServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 获取类别标识符
int categoryId = Integer.parseInt(request.getParameter("categoryId"));
// 创建商品类别服务对象
CategoryService categoryService = new CategoryService();
// 由类别标识符获取类别名
String categoryName = categoryService.findCategoryById(categoryId).getName();
// 创建商品服务对象
ProductService productService = new ProductService();
// 获取指定商品类别的商品列表
List<Product> products = productService.findProductsByCategoryId(categoryId);
// 获取session对象
HttpSession session = request.getSession();
// 把商品列表对象以属性的方式保存到session里
session.setAttribute("products", products);
// 重定向到显示商品信息页面
response.sendRedirect(request.getContextPath() + "/frontend/showProduct.jsp?categoryName=" + categoryName);
// 服务器端控制台输出测试信息
for(int i = 0; i < products.size(); i++){
System.out.println(products.get(i));
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
显示购物车处理类（ShowCartServlet）
代码：
package net.lh.shop.servlet;
/**
* 功能：显示购物车控制程序
* 作者：刘浩
* 日期：2019年12月16日
*/
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.lh.shop.bean.Product;
import net.lh.shop.service.ProductService;
@WebServlet("/showCart")
public class ShowCartServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 获取商品类别标识符
int categoryId = Integer.parseInt(request.getParameter("categoryId"));
// 获取session对象
HttpSession session = request.getSession();
// 获取购物车
LinkedHashMap<Integer, Integer> cart = (LinkedHashMap<Integer, Integer>) session.getAttribute("cart");
// 判断购物车是否为空
if (cart != null) {
// 定义购物表
List<HashMap<String, Object>> shoppingTable = new ArrayList<HashMap<String, Object>>();
// 创建商品服务对象
ProductService productService = new ProductService();
// 购物总金额
double totalPrice = 0.0;
// 遍历购物车
for (Integer id : cart.keySet()) {
// 获取商品对象
Product product = productService.findProductById(id);
// 生成购物表记录
HashMap<String, Object> shoppingItem = new HashMap<String, Object>();
shoppingItem.put("id", product.getId());
shoppingItem.put("name", product.getName());
shoppingItem.put("price", product.getPrice());
shoppingItem.put("amount", cart.get(id));
shoppingItem.put("sum", product.getPrice() * cart.get(id));
// 将购物表记录添加到购物表中
shoppingTable.add(shoppingItem);
// 累加购买总金额
totalPrice = totalPrice + (Double) shoppingItem.get("sum");
}
// 将购物表和购买总金额保存到session里
session.setAttribute("shoppingTable", shoppingTable);
session.setAttribute("totalPrice", totalPrice);
// 重定向到显示商品控制程序
response.sendRedirect(request.getContextPath() + "/showProduct?categoryId=" + categoryId);
} else {
System.out.println("购物车里没有类别号为[" + categoryId + "]的商品！");
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
开始测试
重启服务器访问 http://localhost:8080/simonshop/showCart?categoryId=1
我们去控制台查看信息
操作购物车处理类（OperateCartServlet）
package net.lh.shop.servlet;
/**
* 功能：操作购物车控制程序
* 作者：刘浩
* 日期：2019年12月16日
*/
import java.io.IOException;
import java.util.LinkedHashMap;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.lh.shop.service.ProductService;
@WebServlet("/operateCart")
public class OperateCartServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 获取商品标识符
int id = Integer.parseInt(request.getParameter("id"));
// 获取商品操作
String operation = request.getParameter("operation");
// 从session里获取购物车（键：商品标识符；值：购买数量）
LinkedHashMap<Integer, Integer> cart = (LinkedHashMap<Integer, Integer>) request.getSession()
.getAttribute("cart");
// 判断购物车是否为空
if (cart == null) {
// 创建购物车
cart = new LinkedHashMap<Integer, Integer>();
// 将购物车保存到session里，便于用户在不同页面访问购物车
request.getSession().setAttribute("cart", cart);
}
if (operation.equals("add")) {
// 将商品添加到购物车
if (cart.containsKey(id)) { // 该商品已购买过
// 购买数量增加1
cart.put(id, cart.get(id) + 1);
} else { // 该商品未曾购买
// 购买数量设置为1
cart.put(id, 1);
}
} else if (operation.equals("delete")){
// 将商品从购物车删除
if (cart.get(id) > 1) {
// 购买数量减少1
cart.put(id, cart.get(id) - 1);
} else {
// 从购物车里删除该商品
cart.remove(id);
}
}
// 创建商品服务对象
ProductService productService = new ProductService();
// 获取该商品类别标识符
int categoryId = productService.findProductById(id).getCategoryId();
// 重定向到显示购物车控制程序
response.sendRedirect(request.getContextPath() + "/showCart?categoryId=" + categoryId);
}
}
生成订单处理类（MakeOrderServlet）
package net.lh.shop.servlet;
/**
* 功能：生成订单控制程序
* 作者：刘浩
* 日期：2019年12月16日
*/
import java.io.IOException;
import java.sql.Timestamp;
import java.util.Date;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.lh.shop.bean.Order;
import net.lh.shop.bean.User;
import net.lh.shop.service.OrderService;
import net.lh.shop.service.UserService;
import net.lh.shop.service.OrderService;
import net.lh.shop.service.UserService;
@WebServlet("/makeOrder")
public class MakeOrderServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置请求对象的字符编码
request.setCharacterEncoding("utf-8");
// 获取表单提交数据
String username = request.getParameter("username");
String telephone = request.getParameter("telephone");
Double totalPrice = Double.parseDouble(request.getParameter("totalPrice"));
String deliveryAddress = request.getParameter("deliveryAddress");
// 创建订单对象
Order order = new Order();
// 设置订单属性
order.setUsername(username);
order.setTotalPrice(totalPrice);
order.setTelephone(telephone);
order.setDeliveryAddress(deliveryAddress);
order.setOrderTime(new Date());
// 创建订单服务
OrderService orderService = new OrderService();
// 添加订单
orderService.addOrder(order);
// 获取最后一个订单
Order lastOrder = orderService.findLastOrder();
// 保存到session里
request.getSession().setAttribute("lastOrder", lastOrder);
// 重定向到显示订单页面
response.sendRedirect(request.getContextPath() + "/frontend/showOrder.jsp");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
支付处理类（PayServlet）
package net.lh.shop.servlet;
/**
* 功能：支付处理程序
* 作者：刘浩
* 日期：2019年12月16日
*/
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/pay")
public class PayServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置请求对象的字符编码
request.setCharacterEncoding("utf-8");
///////////////////////
// 待做部分
// 设置session失效
request.getSession().invalidate();
// 重定向到登录页面
response.sendRedirect(request.getContextPath() + "/login.jsp");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
显示用户处理类（ShowUserServlet）
package net.lh.shop.servlet;
/**
* 功能：显示用户控制程序
* 作者：刘浩
* 日期：2019年12月14日
*/
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.lh.shop.bean.User;
import net.lh.shop.service.UserService;
@WebServlet("/showUser")
public class ShowUserServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 创建用户服务对象
UserService userService = new UserService();
// 获取全部用户
List<User> users = userService.findAllUsers();
// 获取session对象
HttpSession session = request.getSession();
// 把用户列表以属性的方式保存到session里
session.setAttribute("users", users);
// 重定向到显示用户页面（showUser.jsp）
response.sendRedirect(request.getContextPath() + "/backend/showUser.jsp");
// 在控制台输出所有用户信息
for (User user: users) {
System.out.println(user);
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
重启服务器输入 http://localhost:8080/simonshop/showUser
我们到服务器控制台查看信息
