Java Tutorial/JSTL/Introduction
Содержание
JSTL in XML Format
<?xml version="1.0"?>
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<jsp:root xmlns:jsp="http://java.sun.ru/JSP/Page"
version="1.2">
<jsp:directive.page contentType="text/html"/>
<jsp:directive.page import="java.util.Date, java.util.Locale"/>
<jsp:directive.page import="java.text.*"/>
<jsp:declaration>
String getDateTimeStr(Locale l) {
DateFormat df = SimpleDateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM, l);
return df.format(new Date());
}
</jsp:declaration>
<html>
<head>
<title>Example JSP in XML format</title>
</head>
<body>
This is the output of a simple JSP using XML format.
<br />
<div>Use a jsp:scriptlet to loop from 1 to 10: </div>
<jsp:scriptlet>
// Note we need to declare CDATA because we don"t escape the less than symbol
for (int i = 1; i <=10; i++) {
out.println(i);
if (i < 10) {
out.println(", ");
}
}
</jsp:scriptlet>
<div align="left">
Use a jsp:expression to write the date and time in the browser"s locale:
<jsp:expression>getDateTimeStr(request.getLocale())</jsp:expression>
</div>
<jsp:text>
<p>This sentence is enclosed in a jsp:text element.</p>
</jsp:text>
</body>
</html>
</jsp:root>
JSTL JSP XML Format Page
<tags:xhtmlbasic xmlns:tags="urn:jsptagdir:/WEB-INF/tags"
xmlns:jsp="http://java.sun.ru/JSP/Page"
xmlns:fmt="http://java.sun.ru/jstl/fmt"
xmlns="http://www.w3.org/1999/xhtml">
<jsp:directive.page contentType="text/html" />
<head>
<title>JSPX - XHTML Basic Example</title>
</head>
<body>
<h1>JSPX - XHTML Basic Example</h1>
<hr/>
<p/>
<p/>
<p/>
<jsp:useBean id="now" class="java.util.Date" />
<fmt:formatDate value="${now}" pattern="MMMM d, yyyy, H:mm:ss"/>
</body>
</tags:xhtmlbasic>
Setup Environment for Development Custom Tag
MyTag.java
package taglib;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.IOException;
public class MyTag extends TagSupport
{
public int doStartTag() throws JspException
{
return EVAL_BODY_INCLUDE;
}
public int doAfterBody() throws JspException
{
System.out.println("Hello!");
return SKIP_BODY;
}
}
Setup Environment for JSTL
web.xml
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.ru/dtd/web-app_2_3.dtd">
<web-app>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.timeZone</param-name>
<param-value>US/Central</param-value>
</context-param>
<context-param>
<param-name>database-driver</param-name>
<param-value>org.gjt.mm.mysql.Driver</param-value>
</context-param>
<context-param>
<param-name>database-url</param-name>
<param-value>
jdbc:mysql://localhost/forum?user=forumuser</param-value>
</context-param>
<taglib>
<taglib-uri>http://java.sun.ru/jstl/fmt</taglib-uri>
<taglib-location>/WEB-INF/fmt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.ru/jstl/fmt-rt</taglib-uri>
<taglib-location>/WEB-INF/fmt-rt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.ru/jstl/core</taglib-uri>
<taglib-location>/WEB-INF/c.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.ru/jstl/core-rt</taglib-uri>
<taglib-location>/WEB-INF/c-rt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.ru/jstl/sql</taglib-uri>
<taglib-location>/WEB-INF/sql.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.ru/jstl/sql-rt</taglib-uri>
<taglib-location>/WEB-INF/sql-rt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.ru/jstl/x</taglib-uri>
<taglib-location>/WEB-INF/x.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.ru/jstl/x-rt</taglib-uri>
<taglib-location>/WEB-INF/x-rt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>
http://java.jeffheaton.ru/taglib/jstl/forum</taglib-uri>
<taglib-location>/WEB-INF/forum.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/tlt</taglib-uri>
<taglib-location>/WEB-INF/taglib.tld</taglib-location>
</taglib>
</web-app>
