How can I retain HTML form field values in JSP after submitting form to Servlet?

Question

After submitting data in the HTML from, a servlet adds these data to my DB and forwards a result message to a JSP page. I want to retain the initially submitted values in th

Answer 1

You could access single-value request parameters by ${param}.

<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
...

${fn:escapeXml(param.bar)}
...



...

    label a
    label b
    label c

Do note that JSTL's fn:escapeXml() is necessary in order to prevent XSS attacks. See also XSS prevention in JSP/Servlet web application.

You could access multi-value request parameters by ${paramValues} and EL 3.0 streams.

v == 'a').get() ? 'checked' : ''} />
v == 'b').get() ? 'checked' : ''} />
v == 'c').get() ? 'checked' : ''} />
...

    v == 'a').get() ? 'selected' : ''}>label a
    v == 'b').get() ? 'selected' : ''}>label b
    v == 'c').get() ? 'selected' : ''}>label c