Javaserver Pages Syntax Page 8
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9Standard Elements
Usage
Description
Syntax
JSP
XML
<jsp:text>
A
Encloses template data, which
<jsp:text>
Same as JSP syntax. When included in a JSP document, the
is passed through
template data
template data must be well-formed XML.
uninterpreted to the current
</jsp:text>
output while preserving
whitespace.
<jsp:useBean>
A
Locates or instantiates a bean
<jsp:useBean id="beanInstanceName"
<jsp:useBean id="beanInstanceName"
with a specific name and scope.
scope="page|request|session|application"
scope="page|request|session|application"
{
{
class="package.class" [ type="package.class" ] |
class="package.class" [ type="package.class" ] |
beanName="{package.class | '${' Expression '}' |
beanName="{package.class | '${' Expression '}' |
<%= expression %>}"
%= expression %}"
type="package.class" |
type="package.class" |
type="package.class"
type="package.class"
}
}
{ /> | >
other elements
{ /> | >
other elements
</jsp:useBean> }
</jsp:useBean> }
<tagPrefix:name>
Accesses a custom tag’s
<tagPrefix:name attribute="value"+ ...
/> |
<tagPrefix:name attribute="value"+ ...
/> |
functionality.
<tagPrefix:name attribute="value"+ ... >
<tagPrefix:name attribute="value"+ ... >
other tags and data
other tags and data
</tagPrefix:name>
</tagPrefix:name>
Implicit Objects for
Type
Scope
Some Useful Methods (see class or interface for others)
Scriptlets
Subclass of javax.servlet.ServletRequest
Request
getAttribute, getParameter, getParameterNames, getParameterValues, setAttribute
request
Subclass of javax.servlet.ServletResponse
Page
Not typically used by JSP page authors
response
javax.servlet.jsp.PageContext
Page
findAttribute, getAttribute, getAttributesScope, getAttributeNamesInScope, setAttribute
pageContext
javax.servlet.http.HttpSession
Session
getAttribute, getId, setAttribute
session
javax.servlet.ServletContext
Application
getAttribute, getMimeType, getRealPath, setAttribute
application
javax.servlet.jsp.JspWriter
Page
clear, clearBuffer, flush, getBufferSize, getRemaining
out
config
javax.servlet.ServletConfig
Page
getInitParameter, getInitParameterNames
page
java.lang.Object
Page
Not typically used by JSP page authors
exception
java.lang.Throwable
Page
getMessage, getLocalizedMessage, printStackTrace, toString
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