struts 1.xからstruts 2(3)OGLLにアップグレード

package example;

public class Book {
    private String isbn;
    private String title;
    private double price;
    
    public Book() {        
    }
    
    public Book(String isbn, String title, double price) {
        this.isbn = isbn;
        this.title = title;
        this.price = price;
    }

    public String getIsbn() {
        return isbn;
    }

    public void setIsbn(String isbn) {
        this.isbn = isbn;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }    
}

package example;

import java.util.Collection;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

public class BookDao 
{
    private static final BookDao instance;
    private static final ConcurrentMap<String, Book> data;
    
    static {
        instance = new BookDao();
        data = new ConcurrentHashMap<String, Book>();
        data.put("978-0735619678", new Book("978-0735619678", "Code Complete, Second Edition", 32.99));
        data.put("978-0596007867", new Book("978-0596007867", "The Art of Project Management", 35.96));
        data.put("978-0201633610", new Book("978-0201633610", "Design Patterns: Elements of Reusable Object-Oriented Software", 43.19));
        data.put("978-0596527341", new Book("978-0596527341", "Information Architecture for the World Wide Web: Designing Large-Scale Web Sites", 25.19));
        data.put("978-0735605350", new Book("978-0735605350", "Software Estimation: Demystifying the Black Art", 25.19));
    }
    
    private BookDao() {}
    
    public static BookDao getInstance() {
        return instance;
    }
    
    public Collection<Book> getBooks() {
        return data.values();
    }
    
    public Book getBook(String isbn) {
        return data.get(isbn);
    }
    
    public void storeBook(Book book) {
        data.put(book.getIsbn(), book);
    }
        
    public void removeBook(String isbn) {
        data.remove(isbn);
    }
    
    public void removeBooks(String[] isbns) {
        for(String isbn : isbns) {
            data.remove(isbn);
        }
    }
}

package example;

import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.SessionAware;
import org.apache.struts2.util.ServletContextAware;

import com.opensymphony.xwork2.ActionSupport;

public class OgnlAction extends ActionSupport implements ServletRequestAware, SessionAware, ServletContextAware  {
    private static final long serialVersionUID = 1L;
    
    private HttpServletRequest request;
    private Map<String, String> session;
    private ServletContext application;
    private List<Book> books;
            
    public void setServletRequest(HttpServletRequest request) {
        this.request = request;    
    }

    @SuppressWarnings("unchecked")
    public void setSession(Map session) {
        this.session = session;        
    }

    public void setServletContext(ServletContext application) {
        this.application = application;
    }
    
    public List<Book> getBooks() {
        return books;
    }

    @Override
    public String execute() {
        request.setAttribute("userName", "Max From request");
        session.put("userName", "Max From session");
        application.setAttribute("userName", "Max From application");
        
        books = new LinkedList<Book>();
        books.add(new Book("978-0735619678", "Code Complete, Second Edition", 32.99));
        books.add(new Book("978-0596007867", "The Art of Project Management", 35.96));
        books.add(new Book("978-0201633610", "Design Patterns: Elements of Reusable Object-Oriented Software", 43.19));
        books.add(new Book("978-0596527341", "Information Architecture for the World Wide Web: Designing Large-Scale Web Sites", 25.19));
        books.add(new Book("978-0735605350", "Software Estimation: Demystifying the Black Art", 25.19));
        
        return SUCCESS;
    }
}

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Struts OGNL Demo</title>
</head>
<body>    
    <h3>  OGNL    Action   </h3>
    <p>parameters: <s:property value="#parameters.userName" /></p>
    <p>request.userName: <s:property value="#request.userName" /></p>
    <p>session.userName: <s:property value="#session.userName" /></p>
    <p>application.userName: <s:property value="#application.userName" /></p>
    <p>attr.userName: <s:property value="#attr.userName" /></p>
    <hr />
    <h3>       （projecting)  </h3>
    <p>Books more than $35</p>
    <ul>
        <s:iterator value="books.{?#this.price > 35}">
            <li><s:property value="title" /> - ___FCKpd___3lt;s:property value="price" /></li>
        </s:iterator>
    </ul>
    <p>The price of "Code Complete, Second Edition" is: <s:property value="books.{?#this.title=='Code Complete, Second Edition'}.{price}[0]"/></p>
    <hr />
    <h3>  Map</h3>
    <s:set name="foobar" value="#{'foo1':'bar1', 'foo2':'bar2'}" />
    <p>The value of key "foo1" is <s:property value="#foobar['foo1']" /></p>
</body>
</html>

<action name="Ognl" class="example.OgnlAction">
	<result>/Ognl.jsp</result>
</action>

<h3>%   </h3>
<p><s:url value="#foobar['foo1']" /></p>
<p><s:url value="%{#foobar['foo1']}" /></p>

%   

#foobar['foo1']

bar1