一、在WEB-INF下面新建tld文件（/WEB-INF/tld/fns.tld）
1、fns.tld文件
<?xml version="1.0" encoding="UTF-8" ?>
<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/j2ee/web-jsptaglibrary_2_0.xsd"
version="2.0">
<description>JSTL 1.1 functions library</description>
<display-name>JSTL functions sys</display-name>
<tlib-version>1.1</tlib-version>
<short-name>fns</short-name>
<uri>http://java.sun.com/jsp/jstl/functionss</uri>
<function>
<description>时间格式化函数</description>
<name>formatTime</name>
<function-class>com.dgw.utils.FormatTime</function-class>
<function-signature>java.lang.String formatTime(java.lang.String)</function-signature>
<example>
${fns:formatTime(time)}
</example>
</function>
</taglib>2、新建FormatTime解析文件
package com.dgw.utils;
/**
* fns表达式函数服务类
*/
public class FormatTime {
public static String formatTime(String time){
time=time.substring(11,16);
return time;
}
}
3、在对应的jsp页面引入
<%@ taglib prefix="fns" uri="/WEB-INF/tld/fns.tld" %>4、在对应的地方使用
${fns:formatTime(time)}
