The Need for JSP

With servlets, it is easy to

Read form data

Read HTTP request headers

Set HTTP status codes and response headers

Use cookies and session tracking

Share data among servlets

Remember data between requests

Get fun, high paying jobs

But, it sure is a pain to

Use those println statements to generate HTML

Maintain that HTML

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JSP

www.corewebprogramming.com

The JSP Framework

Idea: 

Use regular HTML for most of page

Mark servlet code with special tags

Entire JSP page gets translated into a servlet (once), and 

servlet is what actually gets invoked (for each request)

Example: 

JSP 

Thanks for ordering 

<%= request.getParameter("title") %>

URL 

http://host/OrderConfirmation.jsp?title=Core+Web+Programming

Result

Thanks for ordering Core Web Programming

4

JSP

www.corewebprogramming.com

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