| JSP Element
| Syntax
| Interpretation
| Notes
|
| JSP Expression
| <%= expression %>
| Expression is evaluated and placed in output.
| XML equivalent is
<jsp:expression>
expression
</jsp:expression>. Predefined variables
are request, response,
out, session, application,
config, and pageContext
(available in scriptlets also).
|
| JSP Scriptlet
| <% code %>
| Code is inserted in service method.
| XML equivalent is
<jsp:scriptlet>
code
</jsp:scriptlet>.
|
| JSP Declaration
| <%! code %>
| Code is inserted in body of servlet class,
outside of service method.
| XML equivalent is
<jsp:declaration>
code
</jsp:declaration>.
|
JSP page Directive
| <%@ page att="val" %>
| Directions to the servlet engine about general setup.
| XML equivalent is
<jsp:directive.page att="val"\>.
- import="package.class"
- contentType="MIME-Type"
- isThreadSafe="true|false"
- session="true|false"
- buffer="sizekb|none"
- autoflush="true|false"
- extends="package.class"
- info="message"
- errorPage="url"
- isErrorPage="true|false"
- language="java"
|
JSP include Directive
| <%@ include file="url" %>
| A file on the local system to be included when the JSP page
is translated into a servlet.
| XML equivalent is
<jsp:directive.include
file="url"\>.
The URL must be a relative one. Use the
jsp:include action to include a file at
request time instead of translation time.
|
| JSP Comment
| <%-- comment --%>
| Comment; ignored when JSP page is translated into servlet.
| If you want a comment in the resultant HTML, use regular
HTML comment syntax of
<-- comment -->.
|
The jsp:include Action
| <jsp:include
page="relative URL"
flush="true"/>
| Includes a file at the time the page is requested.
| If you want to include the file at the time the page
is translated, use the page directive with the
include attribute instead. Warning: on some servers,
the included file must be an HTML file or JSP file, as determined by the
server (usually based on the file extension).
|
The jsp:useBean Action
| <jsp:useBean att=val*/> or
<jsp:useBean att=val*>
...
</jsp:useBean>
| Find or build a Java Bean.
| Possible attributes are:
- id="name"
- scope="page|request|session|application"
- class="package.class"
- type="package.class"
- beanName="package.class"
|
The jsp:setProperty Action
| <jsp:setProperty att=val*/>
| Set bean properties, either explicitly or by
designating that value comes from a request parameter.
| Legal attributes are
- name="beanName"
- property="propertyName|*"
- param="parameterName"
- value="val"
|
The jsp:getProperty Action
| <jsp:getProperty
name="propertyName"
value="val"/>
| Retrieve and output bean properties.
|
|
The jsp:forward Action
| <jsp:forward
page="relative URL"/>
| Forwards request to another page.
|
|
The jsp:plugin Action
|
<jsp:plugin
attribute="value"*>
...
</jsp:plugin>
| Generates OBJECT or EMBED tags,
as appropriate to the browser
type, asking that an applet be run using the Java Plugin.
|
|
SCJP 5.0 Simulator 642+ Questions With Explanations 