Beans with scriptlet : Beans « JSP « Java
Beans with scriptlet
<%@ page import="com.java2s.Book" %>
<%
Book myBook = (Book) session.getAttribute("myBookBean");
if ( myBook == null)
{
myBook = new Book();
myBook.setAuthor("Joe");
session.setAttribute("myBookBean", myBook);
} // end of if ()
%>
<html>
<head><title>JavaBean usage with scriptlets (1)</title></head>
<body>
This page creates a JavaBean if you don't already have one.<P></P>
Click <a href="page2_scriptlet.jsp">here</a> to go to a page that retrieves it.
</body>
</html>
//page2_scriptlet.jsp
<%@ page import="com.java2s.Book" %>
<%
Book myBook = (Book) session.getAttribute("myBookBean");
%>
<html>
<head><title>JavaBean usage with scriptlets (2) </title></head>
<body>
This page retrieves a JavaBean, and its properties.<P>
<table border="1">
<th>JavaBean property</th><th>Value</th>
<tr><td>id</td> <td><%= myBookBean.getId() %></td></tr>
<tr><td>title</td> <td><%= myBookBean.getTitle() %></td></tr>
<tr><td>author</td><td><%= myBookBean.getAuthor() %></td></tr>
<tr><td>price</td> <td><%= myBookBean.getPrice() %></td></tr>
</table>
</body>
</html>
///JavaBean usage - useBean and setProperty tags
<jsp:useBean id="myBookBean"
class="com.java2s.Book"
scope="session">
<jsp:setProperty name="myBookBean" property="id" value="42" />
<jsp:setProperty name="myBookBean" property="author" value="Ruth" />
<jsp:setProperty name="myBookBean" property="title" value="Cookery for accountants" />
<jsp:setProperty name="myBookBean" property="price" value="29.99" />
</jsp:useBean>
<html>
<head><title>JavaBean usage - useBean and setProperty tags</title></head>
<body>
This page creates a JavaBean if you don't already have one.<P></P>
Click <a href="useAndSet2.jsp">here</a> to go to a page that retrieves it.
</body>
</html>
//useAndSet2.jsp
<html>
<head><title>JavaBean usage - getProperty tag</title></head>
<body>
This page retrieves a JavaBean, and its properties.<P>
<table border="1">
<th>JavaBean property</th><th>Value</th>
<tr><td>id</td> <td><jsp:getProperty name="myBookBean" property="id" /></td></tr>
<tr><td>title</td> <td><jsp:getProperty name="myBookBean" property="title" /></td></tr>
<tr><td>author</td><td><jsp:getProperty name="myBookBean" property="author" /></td></tr>
<tr><td>price</td> <td><jsp:getProperty name="myBookBean" property="price" /></td></tr>
</table>
</body>
</html>
