OS(OpenSymphony)的SiteMesh是一个用来在JSP中实现页面布局和装饰（layout and decoration）的框架组件，能够帮助网站开发人员较容易实现页面中动态内容和静态装饰外观的分离。-OS (OpenSymphony) is a SiteMesh the JSP in the implementation used in page layout and decoration (layout and decoration) of the framework compo