In a Servlet, check if Form Field is present - Real's Java How-to

Java
- Language
- String and Number
- AWT
- Swing
- Environment
- IO
- JDBC
- Thread
- Networking
- JSP / Servlet
- XML/RSS/JSON
- Localization
- Security
- JNI/JNA
- Date / Time
- Open Source
- Varia

Javascript
- Language
- HTML & CSS
- Form
- Mobile
- Varia

Powerbuilder

More HowTo
- WSH & VBScript
- Windows,Batch,PDF,...

Varia
- BigIndex
- Download
- TS2068/Sinclair QL
- Real's HowTo FAQ
- Donate!
- Funny 1
- Funny 2
- Funny 3
- Funny 4
- One line
- Ascii Art

In a Servlet, check if Form Field is presentTag(s): Servlet/JSP

public isDefined(HttpServletRequest req, String fieldNameToSearchFor) {
   return req.getParameterMap().containsKey(fieldNameToSearchFor);
}

Send comment, question or suggestion to howto@rgagnon.com