自定义Html标签方式

首先需要定义一个.tld文件   

<?xml version="1.0" encoding="ISO-8859-1" ?>

<!DOCTYPE taglib

  PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"

  "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">

<taglib>

  <tlib-version>1.0</tlib-version>

  <jsp-version>1.2</jsp-version>

    <short-name>c_pw</short-name>

    <uri>/mytaglib</uri>

    <tag>

      <name>checkRight</name>

    <tag-class>com.thwl.jq.nexus.util.CheckRight</tag-class>

    <body-content>scriptless</body-content>

    <attribute>

        <name>level</name>

         <required>false</required>

         <rtexprvalue>true</rtexprvalue>

    </attribute>

    <attribute>

    <name>modelId</name>

         <required>false</required>

         <rtexprvalue>true</rtexprvalue>

    </attribute>

    </tag>

    </taglib>

格式如上所示

web.xml需要加入如下配置

<jsp-config>
<taglib>
<taglib-uri>core</taglib-uri>
<taglib-location>/WEB-INF/c-rt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>fmt</taglib-uri>
<taglib-location>/WEB-INF/fmt-rt.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>fn</taglib-uri>
<taglib-location>/WEB-INF/fn.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>functions</taglib-uri>
<taglib-location>/WEB-INF/functions.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>s</taglib-uri>
<taglib-location>/WEB-INF/struts-tags.tld</taglib-location>
</taglib>
<!-- 引入自定义标签 -->
<taglib>
    <taglib-uri>c_pw</taglib-uri>
<taglib-location>/WEB-INF/pw.tld</taglib-location>
</taglib>
</jsp-config>

引入这个配置文件 

需要继承于SimpleTagSupport或者TagSupport

实现doTag()方法