jstl 自定义函数库

1.创建函数类：
 

Java代码

1. package user;   
2.   
3. public class MyFunction {   
4.   
5.     public static String sayHello(String name){   
6.         return "Hello "+name;   
7.     }   
8. }  

package user; public class MyFunction { public static String sayHello(String name){ return "Hello "+name; } }

2.创建tld文件
 

Xml代码

1. <?xml version="1.0" encoding="UTF-8" ?>  
2.   
3. <taglib xmlns="http://java.sun.com/xml/ns/j2ee"  
4.   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
5.   xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"  
6.   version="2.0">  
7.        
8.   <tlib-version>1.0</tlib-version>  
9.   <short-name>my</short-name>  
10.   <uri>http://singlegogogo.com/myfunction</uri>  
11.   
12.   <function>  
13.     <name>say</name>  
14.     <function-class>user.MyFunction</function-class>  
15.     <function-signature>java.lang.String sayHello(java.lang.String)</function-signature>  
16.   </function>  
17.   
18.  </taglib>  

<?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"> <tlib-version>1.0</tlib-version> <short-name>my</short-name> <uri>http://singlegogogo.com/myfunction</uri> <function> <name>say</name> <function-class>user.MyFunction</function-class> <function-signature>java.lang.String sayHello(java.lang.String)</function-signature> </function> </taglib>

3.jsp中引入taglib:
 

Html代码

1. <%@ taglib prefix="my" uri="http://singlegogogo.com/myfunction" %>