JSP XML syntax in Software Integration qrcode in Software JSP XML syntax

3. using barcode encoder for software control to generate, create quick response code image in software applications. Developing with Visual Studio .NET After packaging the previous qr codes for None JSP into a WAR file, deploying it, and pointing the browser to the appropriate URL, we should see it rendered in the browser:. In this particular case, the toString() method outputs the customer"s first and last names. Therefore, the output is indistinguishable from displaying these two properties next to each other. Of course, the techniques shown in the example work on every scope.

We can access a bean attached to any scope by not specifying any properties. Similarly, we can access bean properties on any scope and, of course, we can access individual elements to a collection or array attached to any scope..

JSP XML syntax In addition to using the stan dard JSP syntax that we have been discussing throughout this chapter, JSPs can also be developed using XML syntax. JSPs developed using this alternate syntax are formally known as JSP documents. By convention, JSP document filenames end with the .

jspx extension.. [ 117 ]. JavaServer Pages The following table compares Software QR-Code the standard JSP syntax with the equivalent XML syntax:. JSP Feature Comment Declaration Standard Syntax Example <%-- comment --%> <%! String s; %> XML Syntax Example <!-- comment --> <js Software QR-Code p:declaration> String s; </jsp:declaration> <jsp:expression> new java.util.Date() </jsp:expression> <jsp:scriptlet> <![CDATA[ x = 5 + y; ]]> </jsp:scriptlet> <jsp:directive.

attribute name="addressType" required="true"/> <jsp:directive.include file="navigation.jspf" /> <jsp:directive.

page import="java.util. Enumeration" /> <jsp:directive.

tag language="java" /> <jsp:root xmlns:d="DemoTagLibrary"> <jsp:directive.variable name-given="value" />. Expression <%= new java.util.Date() %> Scriptlet <% x = 5 + y; %> Attribute Directive Include Directive Page Directive <%@ attribute name="addres qr barcode for None sType" required="true"%> <%@ include file="navigation.jspf"%> <%@page import="java.util.

Enumeration"%>. Tag Directive <%@ tag language="java"%> Taglib Directive Variable Directive <%@taglib prefix="d" uri="DemoTagLibrary"%> <%@ variable name-given="value" %> As we can see from this table , developing JSPs using XML syntax is fairly easy and straightforward if we already know how to develop JSPs using the traditional syntax. We should note that the tag and attribute directives described in the table can only be used in JSP tags. To develop a JSP using XML syntax, we simply need to use the XML syntax for all the JSP features we intend to use.

Also, as JSP documents need to be valid XML, we need to make sure our JSPs are correctly formatted, making sure that each opening tag has a corresponding closing tag, for instance.. [ 118 ]. 3 . The following JSP document is QR Code ISO/IEC18004 for None a modified version of one of the examples we saw in the JSPs and JavaBeans section earlier in this chapter:. < xml version="1.0" encodi ng="UTF-8" > <jsp:root xmlns:jsp="http://java.sun.

com/JSP/Page" version="2.0"> < language="java" contentType="text/html" pageEncoding="UTF-8"/> <jsp:useBean id="customer" class="net.


CustomerBean" scope="page"> </jsp:useBean> <jsp:setProperty name="customer" property="firstName" param="fNm" /> <jsp:setProperty name="customer" property="lastName" param="lNm" /> <html> <head> <title>JavaBean Properties</title> </head> <body> <form> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td align="right">First Name: </td> <td><input type="text" name="firstName" value="${customer.firstName}"/> </td> </tr> <tr> <td align="right">Last Name: </td> <td><input type="text" name="lastName" value="${customer.lastName}"/> </td> </tr> <tr> <td></td> <td><input type="submit" value="Submit"/></td> </tr> </table> </form> </body> </html> </jsp:root>.

[ 119 ]. JavaServer Pages Notice that other than some m Software QRCode inor changes to make the page XML compliant, all we had to do to use the XML syntax was to add a <jsp:root> element and change the page directive to use the XML syntax we described in the table earlier in this section.. This chapter covered a lot of ground. We talked about how to develop and deploy simple JSPs. We also covered how to access implicit objects such as request, session, and so on, from JSPs.

Additionally, we covered how to set and get the values of JavaBean properties via the <jsp:useBean> tag. In addition to that, we covered how to include a JSP into another JSP at runtime via the <jsp:include> tag, and at compilation time via the JSP include directive. We also covered how to write custom JSP tags by extending javax.


SimpleTagSupport or by writing TAG files. We also covered how to access JavaBeans and their properties via the Unified Expression Language. Finally, we covered the JSP XML syntax that allows us to develop XML-compliant JavaServer Pages.

. Summary. [ 120 ].
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