To create a date time pick component, just ensure :
1. Download the struts2-dojo-plugin.jar library.
2. Include the “struts-dojo-tags” tag and output its header.
开始时把struts2-dojo-plugin.jar包导入到项目WEB-INF/libx下 
<%@ taglib prefix="sx" uri="/struts-dojo-tags" %>
For example, 
<%@ taglib prefix="s" uri="/struts-tags" %><%@ taglib prefix="sx" uri="/struts-dojo-tags" %>
       
       ...