測(cè)試環(huán)境： tomcat7,jdk1.7

1.First make a class with a static method like so:

package your.package;public class Functions {       public static String hello(String name) {         return "Hiya, " + name + ".";       }}

2. Then make a file called mytaglib.tld in WEB-INF/tags/:

<?xml version="1.0" encoding="ISO-8859-1" ?>    <taglib xmlns="http://java.sun.com/xml/ns/j2ee"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"       version="2.1">       <tlib-version>1.0</tlib-version>      <uri>http://www.your.url/tablib_name</uri>      <function>          <name>hello</name>          <function-class>your.package.Functions</function-class>          <function-signature>java.lang.String hello(java.lang.String)</function-signature>      </function>      </taglib>     

3.The uri would be used if we were accessing this directly, but instead we’ll be accessing the url from the web.xml below:

 <web-app         xmlns="http://java.sun.com/xml/ns/j2ee"        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"        xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"        version="2.4">        ...       <jsp-config>       <taglib>         <taglib-uri>           http://some.thing/mine         </taglib-uri>         <taglib-location>           /WEB-INF/tags/mytaglib.tld         </taglib-location>       </taglib>        </jsp-config>       ...     </web-app>

4. Note we’re pointing to the mytaglib.tld file just created. And taglib-uri is how we’ll refer to it in the JSP:

    <%@ taglib uri="http://some.thing/mine"