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JSP Standard Tag Library

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Overview
 JSTL
 Core Tag Library
 Methods using EL
 I18N & Formatting Tag Library
 SQL Tag Library
 XML Tag Library

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JSTL
 Custom tags provide a way to reuse
valuable components
 JSTL has reusable standard set of tags.
 Provides the user with a script-free
environment
 User can write code using tags instead of
Java code and scriptlets
 JSTL tags are easier for non-programmers
and inexperienced programmers

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JSTL - Types
JSP Standard Tag Library
(JSTL)
Core Tag
Library
I18N &
Formatting
Tag Library
SQL Tag
Library
XML Tag
Library

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Core Tag Library
Core Tag Library
General
Purpose Tags
Decision
Making Tags
Iteration Tags
set remove out forEach forTokensif choose

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General-purpose tags
 <%@ taglib uri =
"http://java.sun.com/jsp/jstl/core" prefix =
"c" %>
– <c:set var=“varName” value=“value”
scope=“page|request|session|application” />
– <c:remove var=“varName” scope=“page|
request|session|application” />
– <c:out value=“value|expression”
escapeXml=“true|false”
default=“defaultValue” />

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General-purpose tags-Example

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Decision-making tags
– <c:if test =“testcondition” var=“varName”
scope=“page | request | session |
application”>
Body content
– </c:if>
– <c:choose>
<c:when test=“testCondition”>
Body Content
</c:when>
<c:otherwise>
Body Content

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if tags

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choose tags

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Iteration tags
– <c:forEach var=“varName” item=“collection”
begin=“begin” end=“end” step=“step”>
Body Content
– </c:forEach>
– <c:forTokens items=“stringofToken”
delims=“delimiters” var=“varName” >
Body Content
– </c:forTokens>

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Iteration tags - Example

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SQL Tag Library
SQL Tag Library
setDataSource query update paramtransaction

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SQL Tag Library – setDataSource tag
 <%@ taglib uri = "http://java.sun.com/jsp/jstl/sql" prefix
= “sql" %>
– <sql:setDataSource dataSource=“datasource” |
url=“jdbcurl” driver=“jdbcclassdriver” user=“username”
password=“password” var=“varName” scope=“page |
request | session | application” />

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SQL Tag Library – query tag
– <sql:query var=“varName” dataSource=“datasource”
scope=“page | request | session | application”>
SQL Statement

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SQL Tag Library – update tag
– <sql:update var=“varName” dataSource=“datasource”
scope=“page | request | session | application”>
SQL Statement
• <sql:param value=“value” />
– </sql:update>

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SQL Tag Library – transaction tag
– <sql:transaction dataSource=“datasource”
isolation=“isolationLevel”>
• <sql:update> or <sql:query> Statements
– </sql:transaction>

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SQL Tag Library – transaction tag

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param Tag
 Param is used to set values for parameters
markers (“?”) in SQL statement
 It acts as a sub tag for <sql:query> and
<sql:update>

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Summary
 JSTL
 Core Tag Library
– General purpose Tags
– Decision making Tags
– Iteration Tags

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Summary
 Methods using EL
 I18N & Formatting Tag Library
– Locale, Bundle, Message
– formatDate, formatNumber
 SQL Tag Library
– setDataSource
– query
– update
– transaction
– param