User manual ALLAIRE JRUN - JSP - QUICK REFERENCE CARD

scriptlet Directives page Defines page-wide attributes. <%@ page attribute="value" ... %> attributes, with default values, are: Contains a block of scripting code. A JSP page can contain multiple blocks of scripting code. <% script code %> Example: <% String greeting = request.getParameter("Greeting"); out.println(greeting); %> JSP Quick Reference Card Basic Syntax Default scripting language The scripting language of a JSP page defaults to Java. Insert the following line in a JSP page to configure the page to use JavaScript: <%@ page language = "javascript" %> attribute = language="java" | session="true" | contentType=text/html;charset="ISO-8859-1" | import="package(s)" | buffer="8kb" | autoflush="true" | isThreadSafe="true" | info="text_string" | errorPage="relativeURL" | isErrorpage="true" | extends="class_name" value = a string literal in single or double quotes. expression Defines statements evaluated on the server before sending the page output to the client. <%= expression %> Example: <%= myVar1%> include Inserts text into a JSP page. <%@ include file = "path" ... %> Actions jsp:include Call one JSP page from another. Upon completion, the destination page returns control to the calling page. ... Using white space White space contained within the template code is returned to the client as it was entered in the JSP . taglib Defines a custom tag library used by a JSP page. <%@ taglib uri="tagLibraryURI" prefix="tagPrefix" %> Quoting attribute values Quote attribute values, using either single or double quotes, to all JSP elements. For example: <%@ page contentType = "text/plain" %> After the taglib directive, reference the custom tags using the syntax: ... Writing comments for the JSP A JSP comment is not output to the client as part of the JSP page's output. <%-- Comment string... --%> jsp:forward Scripting Elements declaration Creates page-wide definitions such as variables. <%! declaration %> Calls one JSP page from another. Execution of the calling page is terminated by the call. ... Outputting comments to the client HTML comments are output to the client. Example: <%! private String foo = null; public String getFoo() {return this.foo;} %> jsp:plugin Enables you to invoke an applet on a client browser. { { }+ } { arbitrary_text } > jsp:setProperty Sets the value of one or more properties in a bean. pageContext The page context for the JSP. Java type: javax.servlet.jsp.PageContext prop_expr has one of the following forms: property="*" | property="propertyName"| property="propertyName" param="parameterName"| property="propertyName" value="propertyValue" request The client request. Java type: javax.servlet.HttpServletRequest jsp:getProperty Writes the value of a bean property as a string to the out object. response The response to the client. Java type: javax.servlet.HttpServletResponse session The session object created for the requesting client. Java type: javax.servlet.http.HttpSession JSP Objects See the corresponding Java object type for the available methods for these objects. Allaire Contact Information Allaire Web sites Main Allaire Web site: www.allaire.com The elements in brackets ({}) are optional. application The servlet context obtained from the servlet configuration object. Java type: javax.servlet.ServletContext jsp:useBean Defines an instance of a Java bean. body config The ServletConfig object for the JSP page. Java type: javax.servlet.ServletConfig JRun Development Center: www.allaire.com/developer/jrunreferencedesk/ JRun Developer Forum: forums.allaire.com/jrunconf exception The uncaught exception that resulted in the error page being invoked. Java type: java.lang.Throwable Allaire technical support Telephone support is available Monday through from Friday 8 AM to 8 PM Eastern time (except holidays). Toll Free: 888.939.2545 (U.S. and Canada) Telephone: 617.761.2100 (outside U.S. and Canada) JRun is a trademark of Allaire Corporation. All other trademarks are property of their respective holder(s.) © 2000 Allaire Corporation. All rights reserved. Part number: AA-JRQRF-RK typespec is any one of the following: class="className" | class="className" type="typeName" | beanName="beanName" type=" typeName" | type="typeName" out An object that writes into a JSP page's output stream. Java type: javax.servlet.jsp.JspWriter