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The Last Action Hero - Java

Now that the basics are done with, it's time to begin applyingthat theory to Web development. This week, The JSP Files investigates theJSP Request object, and demonstrates how it can be used to process formdata. Learn about JSP's array variables, find out what chocolate chipcookies and couch potatoes have in common, and explore a very unusualpharmacy.

  1. The JSP Files (part 4): The Red Pill
  2. The Last Action Hero
  3. Entering The Matrix
  4. Requesting More
  5. Taking Some Medication
  6. What's For Dessert?
  7. A Chocolate Addiction
  8. Couch Potato
  9. Beating It Into Submission
By: Vikram Vaswani, (c) Melonfire
Rating: starstarstarstarstar / 6
March 07, 2001

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HTML forms are typically used to obtain information from visitors to a Web site - things like their name, mailing address, phone number, and the like - and this information is then processed in a variety of different ways. Some sites store it in a database; others email it to the webmaster; and still other simply redirect it to the trash basket. By using JSP to process a form, you can write simple code snippets that accomplish all of these actions.

Let's begin with a simple example.

<html> <head> <basefont face="Arial"> </head> <body> <center> <form method="GET" action="matrix.jsp"> <table cellspacing="5" cellpadding="5" border="0"> <tr> <td> <font size="-1">Name, rank and serial, number, soldier!</font> </td> <td align="left"> <input type="text" name="name" size="10"> </td> </tr> <tr> <td colspan="2" align="center"> <input type="submit"> </td> </tr> </table> </form> </center> </body> </html>
The most critical line in this entire page is the

<form method="GET" action="matrix.jsp"> ... </form>
As you probably already know, the ACTION attribute of the <FORM> tag specifies the name of the server-side script - "matrix.jsp" in this case - that will process the information entered into the form, while the METHOD attribute specifies the manner in which the information will be passed.

>>> More Java & J2EE Articles          >>> More By Vikram Vaswani, (c) Melonfire

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