Source Code : JSP with Java bean

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JSP with Java bean

<%@ page import="java.util.*" %>
<html>
  <head>
    <title>WishList</title>
    <jsp:useBean class="com.java2s.WishList" id="wishList" scope="session"/>
    <jsp:useBean class="com.java2s.WishListItems" id="wishListItems" scope="application" />
  </head>
  <body>
    <% Enumeration e = request.getParameterNames(); %>
    <% Set map = wishList.getMap(); %>
    <% while(e.hasMoreElements()){
      String key = (String)e.nextElement();
        if(key.equals(wishListItems.getItem(0).getId())){
          map.add(wishListItems.getItem(0));
        }
        if(key.equals(wishListItems.getItem(1).getId())){
          map.add(wishListItems.getItem(1));
        }
        if(key.equals(wishListItems.getItem(2).getId())){
          map.add(wishListItems.getItem(2));
        }
        if(key.equals(wishListItems.getItem(3).getId())){
          map.add(wishListItems.getItem(3));
        }
        if(key.equals(wishListItems.getItem(4).getId())){
          map.add(wishListItems.getItem(4));
        }
      } %>
      Items currently In your Wish List:<br>
      <% if(map.size()==0){ %>
           There are no items in your Wish List<br>
 <%   }
      else {
        Set set = map; %>
        <% if (set!=null){
            com.java2s.Item[] keys = new com.java2s.Item[0];
            keys = (com.java2s.Item[])set.toArray(keys);
            for (int i=0;i<keys.length;i++){ %>
              <%=keys[i].getName()%><%="<br>"%>
   <%       }
          }
      }%>
    <br><a href="wishListForm.jsp">Add another Item</a>
  </body>
</html>

//wishListForm.jsp
<html>
  <head>
    <title>WishList</title>
    <jsp:useBean class="com.java2s.WishList" id="wishList" scope="session"/>
    <jsp:useBean class="com.java2s.WishListItems" id="wishListItems" scope="application" />
  </head>
  <body>
    Please Select items for your WishList:<br>
    <form method="post" action="wishList.jsp">
      <input type="checkbox" name="<%=wishListItems.getItem(0).getId()%>"/><%=wishListItems.getItem(0).getName()%> -
      <%=wishListItems.getItem(0).getName()%></input><br>
      <input type="checkbox" name="<%=wishListItems.getItem(1).getId()%>"/><%=wishListItems.getItem(1).getName()%> -
      <%=wishListItems.getItem(1).getName()%></input><br>
      <input type="checkbox" name="<%=wishListItems.getItem(2).getId()%>"/><%=wishListItems.getItem(2).getName()%> -
      <%=wishListItems.getItem(2).getName()%></input><br>
      <input type="checkbox" name="<%=wishListItems.getItem(3).getId()%>"/><%=wishListItems.getItem(3).getName()%> -
      <%=wishListItems.getItem(3).getName()%></input><br>
      <input type="checkbox" name="<%=wishListItems.getItem(4).getId()%>"/><%=wishListItems.getItem(4).getName()%> -
      <%=wishListItems.getItem(4).getName()%></input><br>
      <input type="submit" value="Add to My WishList">
    </form>
    <p><a href="wishList.jsp">Show me my wishlist</a>
    <p><a href="logout.jsp">Log Out</a>
  </body>
</html>

//logout.jsp
<html>
  <head>
    <title>WishList</title>
    <jsp:useBean class="com.java2s.WishList" id="wishList" scope="session"/>
  </head>
  <body>
    <% session.removeAttribute("wishList");%>
    You have been logged out

    <p><a href="wishListForm.jsp">Log in again</a>
  </body>
</html>
package com.java2s;

public class Item {
  private String id;
  private String name;
  
  public Item(){}
  
  public Item(String s, String t){
    name=s;
    id=t;
  }
  
  public String getId(){
    return id;
  }
  
  public String getName(){
    return name;
  }
}




package com.java2s;
import javax.servlet.http.HttpSessionBindingListener;
import javax.servlet.http.HttpSessionBindingEvent;
import java.util.Set;
import java.util.HashSet;
import java.util.Iterator;

public class WishList implements HttpSessionBindingListener {
  private Set map = new HashSet();
  public Set getMap(){
    return map;
  }

  //Session binding methods
  public void valueBound(HttpSessionBindingEvent e){
    System.out.println("The WishList has been Bound!");
  }

  public void valueUnbound(HttpSessionBindingEvent e){
    Item[] keys = new Item[0];
    System.out.println("Getting values...");
    Iterator it = map.iterator();
    while(it.hasNext()){
      Item item = (Item)it.next();
      System.out.println(item.getName());
    }
  }
}


package com.java2s;

public class WishListItems {
  
  private Item[] items = {
        new Item("ID 1","Name 1"),
        new Item("ID 2","Name 2"),
        new Item("ID 3","Name 3"),
        new Item("ID 4","Name 4"),
        new Item("ID 5","Name 5")
        };
    
  public Item getItem(int i){
    if (items[i]!=null){
      return items[i];
    }
    
    else {
      return null;
    }
  }
  
}

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