Installing JSTL without the Examples If you follow the instructions in the previous section, you will correctly install JSTL and the book examples. In this section, we explain how to install JSTL apart from the book's examples. If you want to install JSTL into a server environment, this is the procedure you follow. The exact directory that JSTL will install into varies somewhat, depending on the version. In the 1.0 version, there is a jstl-1.0 directory, and in 1.0.1 it is called standard-1.0.1. Inside this directory is a lib directory that contains several files. Table B.1 documents the purpose of each of these files. Table B.1. The JSTL Files | c.tld | The core tag library (EL version) | | c-rt.tld | The core tag library (RT version) | | dom.jar | | | fmt.tld | The I18N tag library (EL version) | | fmt-rt.tld | The I18N tag library (RT version) | | jaxp-api.jar | Required JAR file for JSTL | | jaxen-full.jar | Required JAR file for JSTL | | jdbc2_0-stdext.jar | Required JAR file for JSTL | | jstl.jar | Required JAR file for JSTL | | sax.jar | Required JAR file for JSTL | | saxpath.jar | Required JAR file for JSTL | | sql.tld | Database tag library (EL version) | | sql-rt.tld | Database tag library (RT version) | | standard.jar | Required JAR file for JSTL | | xalan.jar | Required JAR file for JSTL | | xerxesImpl.jar | Required JAR file for JSTL | | x.tld | XML tag library (EL version) | | x-rt.tld | XML tag library (RT version) | To properly install JSTL for your Web application, you must copy these files to specific locations. The two JAR files (standard.jar and jstl.jar) must be copied to your Webapp's library directory. This ensures that these files will be part of the classpath. Under the Windows operating system, your lib directory for Tomcat will be C:\Program Files\Apache Tomcat 4.0\webapps\ROOT\WEB-INF\lib. You copy the tag definition files, which have a .tld extension, to your WEB-INF directory. This is typically a child directory of the Web root directory for your Web application. The Web root directory is the directory that holds all your JSP and HTML files. Under the Windows operating system, Tomcat's Web root directory is typically C:\Program Files\Apache Tomcat 4.0\webapps\ROOT. Tomcat's WEB-INF directory is typically C:\Program Files\Apache Tomcat 4.0\webapps\ROOT\WEB-INF. The last step is to let the Web server know where the TLD files are stored. You do this by modifying the web.xml file, which should be located in your WEB-INF directory. Listing B.1 shows a web.xml file that uses all four JSTL tag libraries. Listing B.1 A web.xml That Uses All Four JSTL Taglibs<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"> <web-app> <taglib> <taglib-uri>http://jakarta.apache.org/taglibs/ core</taglib-uri> <taglib-location>/WEB-INF/c.tld</taglib-location> </taglib> <taglib> <taglib-uri>http://jakarta.apache.org/taglibs/sql</taglib-uri> <taglib-location>/WEB-INF/sql.tld</taglib-location> </taglib> <taglib> <taglib-uri>http://jakarta.apache.org/taglibs/fmt</taglib-uri> <taglib-location>/WEB-INF/fmt.tld</taglib-location> </taglib> <taglib> <taglib-uri>http://jakarta.apache.org/taglibs/xml</taglib-uri> <taglib-location>/WEB-INF/x.tld</taglib-location> </taglib> </web-app> As you can see in Listing B.1, each of the four tag libraries has a separate taglib entry. This is the same format that is used for every tag library you'll use. To use any tag library, you simply include the correct taglib-uri and taglib-location properties. Now that you have successfully installed the JSTL required files to their proper locations, you can construct a JSP page that contains JSTL tags. | 
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