The document discusses the JavaServer Pages Standard Tag Library (JSTL). It provides an overview of JSTL and describes the core, SQL, I18N/formatting, and XML tag libraries. The core tag library contains general purpose, decision making, and iteration tags. The SQL tag library allows querying and updating databases using tags like setDataSource, query, update, and transaction. Parameters in SQL statements can be set using the param tag.

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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