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How to implement the Little Bee loudspeaker online mall system in Java
- 王林forward
- 2023-04-18 13:13:04697browse
1. Project Brief
User function module: User registration: User login: Product module: Order module; Backend management system function: Administrator module: Product module: Order management module;
2. Project operation
1. Running environment
JDK1.8 Tomcat8.5 MYSQL Eclispe (Eclispe, MyEclispe, Sts, IntelliJ IDEA are all supported, you can configure it by yourself)
2. Technology stack
JSP Servlet JDBC Ajax JavaScript CSS DBUtil etc.
3. Rendering
public class UserServlet extends BaseBackServlet {
@Override
public String add(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了 UserServlet add方法");
return null;
}
@Override
public String delete(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了 UserServlet delete方法");
int id = Integer.parseInt(request.getParameter("id"));
userDAO.delete(id);
return "@admin_user_list";
}
@Override
public String update(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了 UserServlet update方法");
Map<String, String> params = new HashMap<>();
InputStream is = super.parseUpload(request, params);
System.out.println(params);
int id = Integer.parseInt(params.get("id"));
String password = params.get("password");
User user = userDAO.get(id);
user.setPassword(password);
userDAO.update(user);
return "@admin_user_list";
}
@Override
public String edit(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了 UserServlet edit方法");
int id = Integer.parseInt(request.getParameter("id"));
User u = userDAO.get(id);
request.setAttribute("u", u);
return "admin/editUser.jsp";
}
@Override
public String list(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了 UserServlet list方法");
List<User> us = userDAO.list(page.getStart(), page.getCount());
int total = userDAO.getTotal();
page.setTotal(total);
request.setAttribute("us", us);
request.setAttribute("page", page);
return "admin/listUser.jsp";
}
}
Order management control layerpublic class OrderServlet extends BaseBackServlet {
@Override
public String add(HttpServletRequest request, HttpServletResponse response, Page page) {
return null;
}
@Override
public String delete(HttpServletRequest request, HttpServletResponse response, Page page) {
return null;
}
@Override
public String update(HttpServletRequest request, HttpServletResponse response, Page page) {
return null;
}
@Override
public String edit(HttpServletRequest request, HttpServletResponse response, Page page) {
return null;
}
public String delivery(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了 OrderServlet delivery方法");
int id = Integer.parseInt(request.getParameter("id"));
Order o = orderDAO.get(id);
o.setDeliveryDate(new Date());
o.setStatus(OrderDAO.waitConfirm);
orderDAO.update(o);
return "@admin_order_list";
}
@Override
public String list(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了 OrderServlet list方法");
// 对订单对应的订单项进行初始化
List<Order> os = orderDAO.list(page.getStart(), page.getCount());
orderItemDAO.fill(os);
int total = orderDAO.getTotal();
page.setTotal(total);
request.setAttribute("os", os);
request.setAttribute("page", page);
return "admin/listOrder.jsp";
}
}
Category control layerpublic class CategoryServlet extends BaseBackServlet {
@Override
public String add(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了category add方法");
Map<String,String> params = new HashMap<>();
InputStream is = super.parseUpload(request, params);
System.out.println(params);
String name = params.get("name");
Category c = new Category();
c.setName(name);
categoryDAO.add(c);
File imageFolder = new File(request.getSession().getServletContext().getRealPath("img/category"));
File file = new File(imageFolder, c.getId() + ".jpg");
try{
if(null != is && 0 != is.available()){
try(
FileOutputStream fos = new FileOutputStream(file);
){
byte[] b = new byte[1024 * 1024];
int length = 0;
while(-1 != (length = is.read(b))){
fos.write(b, 0, length);
}
fos.flush();
//通过以下代码，将文件保存为jsp格式
BufferedImage img = ImageUtil.change2jpg(file);
ImageIO.write(img, "jpg", file);
}
}
} catch (IOException e) {
e.printStackTrace();
}
return "@admin_category_list";
}
@Override
public String delete(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了category delete方法");
int id = Integer.parseInt(request.getParameter("id"));
categoryDAO.delete(id);
return "@admin_category_list";
}
@Override
public String update(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了category update方法");
Map<String,String> params = new HashMap<>();
InputStream is = super.parseUpload(request, params);
System.out.println(params);
String name = params.get("name");
int id = Integer.parseInt(params.get("id"));
Category c = new Category();
c.setName(name);
c.setId(id);
categoryDAO.update(c);
File imageFolder = new File(request.getSession().getServletContext().getRealPath("img/category"));
File file = new File(imageFolder, c.getId() + ".jpg");
try{
if(null != is && 0 != is.available()){
try(
FileOutputStream fos = new FileOutputStream(file);
){
byte[] b = new byte[1024 * 1024];
int length = 0;
while(-1 != (length = is.read(b))){
fos.write(b, 0, length);
}
fos.flush();
//通过以下代码，将文件保存为jsp格式
BufferedImage img = ImageUtil.change2jpg(file);
ImageIO.write(img, "jpg", file);
}
}
} catch (IOException e) {
e.printStackTrace();
}
return "@admin_category_list";
}
@Override
public String edit(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了category edit方法");
int id = Integer.parseInt(request.getParameter("id"));
Category category = categoryDAO.get(id);
request.setAttribute("c", category);
return "admin/editCategory.jsp";
}
@Override
public String list(HttpServletRequest request, HttpServletResponse response, Page page) {
List<Category> cs = categoryDAO.list(page.getStart(), page.getCount());
int total = categoryDAO.getTotal();
page.setTotal(total);
request.setAttribute("thecs", cs);
request.setAttribute("page", page);
return "admin/listCategory.jsp";
}
}
Product control layerpublic class ProductServlet extends BaseBackServlet {
@Override
public String add(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了Product add方法");
Map<String, String> params = new HashMap<>();
InputStream inputStream = super.parseUpload(request, params);
System.out.println(params);
int cid = Integer.parseInt(params.get("cid"));
Category c = categoryDAO.get(cid);
String name = params.get("name");
String subTitle = params.get("subTitle");
float originalPrice = Float.parseFloat(params.get("originalPrice"));
float promotePrice = Float.parseFloat(params.get("promotePrice"));
int stock = Integer.parseInt(params.get("stock"));
Product p = new Product();
p.setCategory(c);
p.setName(name);
p.setSubTitle(subTitle);
p.setOriginalPrice(originalPrice);
p.setPromotePrice(promotePrice);
p.setStock(stock);
p.setCreateDate(new Date());
productDAO.add(p);
return "@admin_product_list?cid=" + cid;
}
@Override
public String delete(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了Product delete方法");
int id = Integer.parseInt(request.getParameter("id"));
Product p = productDAO.get(id);
productDAO.delete(id);
return "@admin_product_list?cid=" + p.getCategory().getId();
}
@Override
public String update(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了Product update方法");
Map<String, String> params = new HashMap<>();
InputStream inputStream = super.parseUpload(request, params);
int cid = Integer.parseInt(params.get("cid"));
Category c = categoryDAO.get(cid);
int id = Integer.parseInt(params.get("id"));
String name = params.get("name");
String subTitle = params.get("subTitle");
float originalPrice = Float.parseFloat(params.get("originalPrice"));
float promotePrice = Float.parseFloat(params.get("promotePrice"));
int stock = Integer.parseInt(params.get("stock"));
Product p = new Product();
p.setId(id);
p.setName(name);
p.setSubTitle(subTitle);
p.setOriginalPrice(originalPrice);
p.setPromotePrice(promotePrice);
p.setStock(stock);
p.setCategory(c);
p.setCreateDate(new Date());
productDAO.update(p);
return "@admin_product_list?cid=" + p.getCategory().getId();
}
@Override
public String edit(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了Product edit方法");
int id =Integer.parseInt(request.getParameter("id"));
Product p = productDAO.get(id);
request.setAttribute("p",p);
return "admin/editProduct.jsp";
}
public String updatePropertyValue(HttpServletRequest request, HttpServletResponse response, Page page){
System.out.println("调用了Product updatePropertyValue方法");
int pvid = Integer.parseInt(request.getParameter("pvid"));
String value = request.getParameter("value");
PropertyValue pv = propertyValueDAO.get(pvid);
pv.setValue(value);
propertyValueDAO.update(pv);
return "%success";
}
public String editPropertyValue(HttpServletRequest request, HttpServletResponse response, Page page){
System.out.println("调用了Product editPropertyValue方法");
int id = Integer.parseInt(request.getParameter("id"));
Product p = productDAO.get(id);
request.setAttribute("p", p);
// 初始化属性，将产品对应的属性全部
propertyValueDAO.init(p);
List<PropertyValue> pvs = propertyValueDAO.list(p.getId());
request.setAttribute("pvs", pvs);
return "admin/editPropertyValue.jsp";
}
@Override
public String list(HttpServletRequest request, HttpServletResponse response, Page page) {
System.out.println("调用了Product list方法");
int cid = Integer.parseInt(request.getParameter("cid"));
Category c = categoryDAO.get(cid);
List<Product> ps = productDAO.list(cid, page.getStart(), page.getCount());
int total = productDAO.getTotal(cid);
page.setTotal(total);
page.setParam("&cid=" + c.getId());
request.setAttribute("ps", ps);
request.setAttribute("c", c);
request.setAttribute("page", page);
return "admin/listProduct.jsp";
}
}
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