基于Struts2的自定义标签编者

基于Struts2的自定义标签编辑
1，建立Tag文件,该文件继承于struts2的基本标签组件，如果查看struts2源码，可以看到该类继承了BodyTagSupport，即是一个标准的JSP标签

<taglib xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd">
  <description><![CDATA["To make it easier to access dynamic data;
                        the Apache Struts framework includes a library of custom tags.
                        The tags interact with the framework's validation and internationalization features;
                        to ensure that input is correct and output is localized.
                        The Struts Tags can be used with JSP FreeMarker or Velocity."]]></description>
  <display-name>"Melon Tags"</display-name>
  <tlib-version>2.0</tlib-version>
  <short-name>m</short-name>
  <uri>/melon-tags</uri>
  
  <!--自定义测试 -->
  <tag>
    <description><![CDATA[Execute an action from within a view]]></description>
    <name>textwrap</name>
    <tag-class>net.esj.struts.views.jsp.TextWrapTag</tag-class>
    <body-content>JSP</body-content>
    <attribute>
      <description><![CDATA[Value to be displayed]]></description>
      <name>value</name>
      <required>false</required>
      <rtexprvalue>false</rtexprvalue>
    </attribute>
    <dynamic-attributes>false</dynamic-attributes>
  </tag>
</taglib>

在使用struts的框架中这样添加自定义标签就几乎不用去了解jsp的标签定义了，什么pagecontext多麻烦