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544

Appendix A

Servlet and JSP Quick Reference

Including Static or Dynamic Content

  Basic usage: 

response.setContentType("text/html");

PrintWriter out = response.getWriter();

out.println("...");

RequestDispatcher dispatcher =

getServletContext().getRequestDispatcher("/path/resource");

dispatcher.include(request, response);

out.println("...");

  JSP equivalent is 

jsp:include

, not the JSP 

include

 directive.

Forwarding Requests from JSP Pages

A.16 Using HTML Forms

The FORM Element

  Usual form: 

 ... 

  Attributes: 

ACTION

 (required), 

METHOD

, 

ENCTYPE

, 

TARGET

, 

ONSUBMIT

, 

ONRESET

, 

ACCEPT

, 

ACCEPT CHARSET

Textfields

  Usual form:

 (no end tag)

  Attributes: 

NAME

 (required), 

VALUE

, 

SIZE

, 

MAXLENGTH

, 

ONCHANGE

, 

ONSELECT

, 

ONFOCUS

, 

ONBLUR

, 

ONKEYDOWN

, 

ONKEYPRESS

, 

ONKEYUP

  Different browsers have different rules regarding the situations where 

pressing Enter in a textfield submits the form. So, include a button or 

image map that submits the form explicitly.

Password Fields

  Usual form:

 (no end tag)

  Attributes: 

NAME

 (required), 

VALUE

, 

SIZE

, 

MAXLENGTH

, 

ONCHANGE

, 

ONSELECT

, 

ONFOCUS

, 

ONBLUR

, 

ONKEYDOWN

, 

ONKEYPRESS

, 

ONKEYUP

  Always use 

POST

 with forms that contain password fields.

Second edition of this book: www.coreservlets.com; Sequel: www.moreservlets.com.

Servlet and JSP training courses by book's author: courses.coreservlets.com.