struts s:if 截取字符串,判断字符串长度

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<html>
  <head>
  <title>test</title>
  </head>
  <body>
  <s:if test="user.name.length()>2">
   <s:property value="user.name.substring(0,2)"/>
  </s:if>
  <s:else>
   sun 
  </s:else>
  <hr/>
  <s:property value="user.name.length()"/>
  <hr/>
  <s:set name="test" value="user.name" />
  <s:property value="%{test}"/>
  <s:set name="other" value="123" />
  <hr/>
  <s:if test="#test=='sunteststruts' || #test=='123' || #other=='12'">
   afafasf
  </s:if>
  <hr/>
 
  <s:iterator value="persons" >
   <s:property value="name"/>
  </s:iterator>
  </body>
</html>

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