jstl最常用的标签之

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一 定义

这个标签用于删除某个变量或是属性。

 

二 实战

<%@ page language = "java" import = "java.util.*,com.cakin.domain.*" pageEncoding = "utf-8" %>

<%@ taglib prefix = "c"   uri = " http://java.sun.com/jsp/jstl/core" ; %>

DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" ; >

< html >

  < head >    

    < title > My JSP 'c_out.jsp' starting page title >

  head >

  < body >

                

                 < c:set var = "abc" value = "中国北京" scope = "request" > c:set >

                 < c:out value = " ${abc} " > c:out >

                 < h3 > remove h3 >

                 < c:remove var = "abc" > c:remove >

                 < c:out value = " ${abc} " default = "没有了" > c:out >

  body >

html >

 

三 测试结果

 

 

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