In the toolbox descriptor ( toolbox . xml ) file of this example , two generic tools from the available Velocity tools library are included and made accessible within the template : DateTool and MathTool .
该例子的工具箱描述符（toolbox.xml）文件中，包含了两个来自Velocity工具库的通用工具可以在模板DateTool和MathTool中访问。
mathtool