12. Learning Java: JSTL, part 3 – a rant
Sep 29th, 2010
In this hours, it comes tag files in JSTL. Creating tags and using those tags.
Inside web folder: index.jsp
<%--
Document : index
Created on : Sep 24, 2010, 7:30:10 PM
Author : JAVA
--%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib tagdir="/WEB-INF/tags/" prefix="Emp" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h2>Employee Details</h2>
<table border="1">
<Emp:Header col1="Eno" col2="Ename" col3="Salary" />
<Emp:Data data1="1" data2="Satya" data3="1234.56" />
<Emp:Data data1="2" data2="Dhanu" data3="3241.32" />
<table>
</body>
</html>
Inside web\WEB-INF\tags: Two files - Header.tag and Data.tag
<%--
Document : Data
Created on : Sep 24, 2010, 7:42:58 PM
Author : JAVA
--%>
<%@tag description="put the tag description here" pageEncoding="UTF-8"%>
<%-- The list of normal or fragment attributes can be specified here: --%>
<%-- any content can be specified here e.g.: --%>
<%@ attribute name="data1" %>
<%@ attribute name="data2" %>
<%@ attribute name="data3" %>
<tr>
<td>${data1}</td>
<td>${data2}</td>
<td>${data3}</td>
</tr>
<%--
Document : Header
Created on : Sep 24, 2010, 7:41:39 PM
Author : JAVA
--%>
<%@tag description="put the tag description here" pageEncoding="UTF-8"%>
<%-- The list of normal or fragment attributes can be specified here: --%>
<%-- any content can be specified here e.g.: --%>
<%@ attribute name="col1" %>
<%@ attribute name="col2" %>
<%@ attribute name="col3" %>
<tr>
<th>${col1}</th>
<th>${col2}</th>
<th>${col3}</th>
</tr>
Output:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h2>Employee Details</h2>
<table border="1">
<tr>
<th>Eno</th>
<th>Ename</th>
<th>Salary</th>
</tr>
<tr>
<td>1</td>
<td>Satya</td>
<td>1234.56</td>
</tr>
<tr>
<td>2</td>
<td>Dhanu</td>
<td>3241.32</td>
</tr>
</table>
</body>
</html>
Just got a good short article at SitePoint. Need to read that.
Error coming:
Note: D:\java\Sep24\build\generated\src\org\apache\jsp\index_jsp.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
I am aware of this a little. Solutions was discussed in Generics. Need to study that.
