Programming WebLogic JSP Tag Extensions

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Administration and Configuration

The following sections provide an overview of administration and configuration tasks for using JSP tag extensions:

 

Configuring JSP Tag Libraries

The following steps describe how to configure a JSP tag library. You can also package a tag library as a jar file (see Packaging a JSP Tag Library as JAR File).

  1. Create a tag library descriptor (TLD).

    2. For more information, see Creating a Tag Library Descriptor.

  2. Reference this TLD in the Web Application deployment descriptor, web.xml. For example:
    3. <taglib>
      <taglib-uri>myTLD</taglib-uri>
      <taglib-location>WEB-INF/library.tld</taglib-location>
    </taglib>

    In this example the tag library descriptor is a file called library.tld. Always specify the location of the tld relative to the root of the Web application.

  3. Place the tag library descriptor file in the WEB-INF directory of the Web application.
  4. Reference the tag library in the JSP page.

    5. In your JSP, reference the tag library with a JSP directive. For example: 

    <%@ taglib uri="myTLD" prefix="mytaglib" %>
  5. Place the tag handler Java class files for your tags in the WEB-INF/classes directory of your Web application.
  6. Deploy the Web application on WebLogic Server. For more information, see “Deploying and Packaging from a Split Development Directory” in Developing WebLogic Server Applications.

 

Packaging a JSP Tag Library as JAR File

In addition to the procedure described in the previous section Configuring JSP Tag Libraries, you can also package a JSP tag library as a jar file:

  1. Create a TLD (tag library descriptor) file named taglib.tld.

    2. For more information, see Creating a Tag Library Descriptor.

  2. Create a directory containing the compiled Java tag handler class files used in your tag library.
  3. Create a subdirectory of the directory you created in step 2 and call it META-INF.
  4. Copy the taglib.tld file you created in step 1 into the META-INF directory you created in step 3
  5. Archive your compiled Java class files into a jar file by executing the following command from the directory you created in step 2
    6. jar cv0f myTagLibrary.jar

    (where myTagLibrary.jar is a name you provide)

  6. Copy the jar file into the WEB-INF/lib directory of the Web application that uses your tag library.
  7. Reference this tag library descriptor in the Web application deployment descriptor, web.xml. For example:
    8. <taglib>
      <taglib-uri>myjar.tld</taglib-uri>
      <taglib-location>
         /WEB-INF/lib/myTagLibrary.jar
      </taglib-location>
    </taglib>
  8. Reference the tag library in your JSP. For example:
    9. <%@ taglib uri="myjar.tld" prefix="wl" %>

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