1CIS-604 Term Project
CIS-604 Term Project
Text: Java Servlets and JSP
3rd Edition
The project milestones in this document let you apply the programming skills that you learn in this course by creating a Product Maintenance application that lets users add, update, and delete the product records that are available to the application.
An introduction to the milestones
How the milestones relate to the book chapters
How to develop the milestones
The milestones
Milestone 1:Product Maintenance
Milestone 2:Product Maintenance (continued)
Milestone 3:Product Maintenance with a database connection
Milestone 4:Product Maintenance using a JSP
Milestone 5: Product Maintenance with a custom tag
An introduction to the milestones
This introduction describes how the milestonesrelate to the chapters in the book, and it provides some general information about how to develop these projects.
How the milestones relate to the book chapters
Once you finish week 6, you’ll have all the skills you need to complete the first project milestone, which is a simple version of a Product Maintenance application. Then, when you finish the later chapters, you can enhance the Product Maintenance application by applying the skills presented in those chapters. When you finish chapter 10, for example, you’ll have all the skills you need to create the fifth project milestone.
MilestonePrerequisite chapters
Milestone 1Chapters 1-5
Milestone 2Chapters 1-5
Milestone 3Chapter11 & 12
Milestone 4Chapter6
Milestone 5Chapter 10
How to develop the milestones
The description of each project milestone includes images that show how the pages should appear in a browser, a general description of the operation of the project’s pages, and some general specifications for how the project should be coded. This information is detailed enough for you to complete the project. However, you will need to determine any unspecified details on your own. For example, you will need to create your own names for the servlet and JSP files that you create, you will need to determine what error messages to display when the user enters invalid data, and so on.
Unless you’re instructed otherwise, you can implement each project using any programming techniques you wish. In some cases, however, the project’s specifications will direct you to use a specific programming technique. In that case, you should implement the project as directed.
The milestones
The following pages present the user interface, operation, and specifications for each project. As you view these pages, remember that each project builds upon the previous projects.
Milestone 1:Product Maintenance
For this project milestone, you’ll create a series of pages that allow you to display and add products that are available to the application.
The Index page
The Products page
The Product page
Operation
- When the application starts, it displays the Index page. This page contains a link that leads to the Products page that can be used to view and add products.
- To add a new product, the user selects the Add Product button. This displays the Product page with all text fields empty. Then, the user can fill in the text fields and click on the Update Product button to add the product.
Specifications
- Use a Product class like the one shown later in this document to store the product data.
- Use a ProductIO class like the one shown later in this document to read the product data from a text file named products.txt in the WEB-INF directory.
- Use a text file like the products.txt file shown later in this document as a starting point for the products that are available to the application.
- Use server-side validation to validate all user entries. In particular, make sure the user enters a code, description, and price for each product. In addition, make sure the product’s price is a valid double value.
- Get the Product.java, ProductIO.java, and product.txt files from your instructor. The files are also provided below:
The Product class
package books;
import java.text.NumberFormat;
import java.io.Serializable;
public class Product implements Serializable
{
private String code;
private String description;
private double price;
public Product()
{
code = "";
description = "";
price = 0;
}
public void setCode(String code)
{
this.code = code;
}
public String getCode()
{
return code;
}
public void setDescription(String description)
{
this.description = description;
}
public String getDescription()
{
return description;
}
public void setPrice(double price)
{
this.price = price;
}
public double getPrice()
{
return price;
}
public String getPriceNumberFormat()
{
NumberFormat number = NumberFormat.getNumberInstance();
number.setMinimumFractionDigits(2);
if (price == 0)
return "";
else
return number.format(price);
}
public String getPriceCurrencyFormat()
{
NumberFormat currency = NumberFormat.getCurrencyInstance();
return currency.format(price);
}
}
The ProductIO class
package books;
import java.io.*;
import java.util.*;
public class ProductIO
{
private static ArrayList<Product> products = null;
public static ArrayList<Product> getProducts(String path)
{
products = new ArrayList<Product>();
File file = new File(path);
try
{
BufferedReader in =
new BufferedReader(
new FileReader(file));
String line = in.readLine();
while (line != null)
{
StringTokenizer t = new StringTokenizer(line, "|");
if (t.countTokens() >= 3)
{
String code = t.nextToken();
String description = t.nextToken();
String priceAsString = t.nextToken();
double price = Double.parseDouble(priceAsString);
Product p = new Product();
p.setCode(code);
p.setDescription(description);
p.setPrice(price);
products.add(p);
}
line = in.readLine();
}
in.close();
return products;
}
catch(IOException e)
{
e.printStackTrace();
return null;
}
}
public static Product getProduct(String productCode, String path)
{
products = getProducts(path);
for (Product p : products)
{
if (productCode != null &
productCode.equalsIgnoreCase(p.getCode()))
{
return p;
}
}
return null;
}
public static boolean exists(String productCode, String path)
{
products = getProducts(path);
for (Product p : products)
{
if (productCode != null &
productCode.equalsIgnoreCase(p.getCode()))
{
return true;
}
}
return false;
}
private static void saveProducts(ArrayList<Product> products,
String path)
{
try
{
File file = new File(path);
PrintWriter out =
new PrintWriter(
new FileWriter(file));
for (Product p : products)
{
out.println(p.getCode() + "|"
+ p.getDescription() + "|"
+ p.getPrice());
}
out.close();
}
catch(IOException e)
{
e.printStackTrace();
}
}
public static void insert(Product product, String path)
{
products = getProducts(path);
products.add(product);
saveProducts(products, path);
}
public static void update(Product product, String path)
{
products = getProducts(path);
for (int i = 0; i < products.size(); i++)
{
Product p = products.get(i);
if (product.getCode() != null &
product.getCode().equalsIgnoreCase(p.getCode()))
{
products.set(i, product);
}
}
saveProducts(products, path);
}
public static void delete(Product product, String path)
{
products = getProducts(path);
for (int i = 0; i < products.size(); i++)
{
Product p = products.get(i);
if (product != null &
product.getCode().equalsIgnoreCase(p.getCode()))
{
products.remove(i);
}
}
saveProducts(products, path);
}
}
A product.txt file that contains four products
J601|The Complete Geek’s Guide to Java|34.95
CP01|C++ for Nerds|42.95
CP02|Advanced C++ for Nerds|37.95
C001|Old School Progamming Using ‘C’|14.95
Milestone 2:Product Maintenance (continued)
For this project milestone, you’ll create additional pages that allow you to edit or delete a product that’s available to the application.
The Products page
The Product page
The Confirm Delete page
Operation
- When the application starts, it displays the Index page. This page contains a link that leads to the Products page that can be used to add, update, or delete products.
- To add a new product, the user selects the Add Product button. This displays the Product page with all text fields empty. Then, the user can fill in the text fields and click on the Update Product button to add the product.
- To edit an existing product, the user selects the Edit link for the product. This displays the Product page with all existing data for the product displayed. Then, the user can edit any entries and click on the Update Product button to update the data for the existing product.
- To delete a product, the user selects the Delete link for the product. This displays the Confirm Delete page. Then, if the user confirms the deletion by selecting the Yes button, the product is deleted and the Products page is displayed to reflect the new data. If the user selects the No button, the Products page is displayed.
Specifications
- Use a Product class like the one shown later in this document to store the product data.
- Use a ProductIO class like the one shown later in this document to read and write the product data to a text file named products.txt in the WEB-INF directory.
- Use a text file like the products.txt file shown later in this document as a starting point for the products that are available to the application.
- Use server-side validation to validate all user entries. In particular, make sure the user enters a code, description, and price for each product. In addition, make sure the product’s price is a valid double value.
Milestone3:Product Maintenance with a database connection
For this project, you’ll enhance the application described in the previous milestone by modifying it so it uses a database instead of a text file to store the product data.
The Product page
Specifications
- Use a class named ProductDB that’s in the bookspackage to add, update, and delete the products in the Product Maintenance application.
- Use a connection pool as described in chapter 12.
Milestone4:Product Maintenance using JSP
For this milestone, you’ll convert the Confirm Delete page servlet created in milestone 2 to using a JSP.
The Confirm Delete page
Specifications
- Convert the Confirm Delete page created in milestone two for deleting a productfrom a servlet to a JSP.
Milestone 5:Product Maintenance with a custom tag
For this project, you’ll enhance the application described in milestone 1 by removing the scripting from the Product JSP and by adding a custom tag to validate user entries.
The Product page with custom tags for validation
Specifications
- Use a custom tag to mark empty fields that are required on the Product page with an asterisk.