Validating User Input

Manual and Automatic Validation of Form-Field Values

Alert: the HTML version of this tutorial is no longer being actively maintained, and still covers Struts 1.1. For additional topics, updates for Struts 1.2, and complete source code, please see Jakarta Struts Tutorial: Manual Validation and Jakarta Struts Tutorial: Automatic Validation (in PDF).

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J2EE Short Courses
Personally developed and taught by the author of Core Servlets & JSP, More Servlets & JSP, and this Jakarta Struts tutorial.
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Send email to hall@coreservlets.com to report errors and omissions in this writeup, or to inquire about training courses on Struts, JSP, servlets, JSF, AJAX, or Java 5 programming.
References
Jakarta Struts Books
Servlet & JSP Books