Velocity ——VTL模板中的注释
注释允许在模板中包含描述文字，而这些文字不会被放置到模板引擎的输出中。注释是一种有效的提醒自己和向别人解释你的VTL语句要做什么事情的方法。你也可以把注释用来做其他你认为有用的用途。下面就是一个注释的例子。
This is a single line comment.
一个单行的注释以开始，直到行尾才结束。如果你要写很多行的注释，那么不用使用多各单行注释，VTL还提供了多行注释。多行注释以#*开始，以*#结束。下面是一个多行注释的例子。
This is text that is outside the multi-line comment.
Online visitors can see it.
#*
Thus begins a multi-line comment. Online visitors won’t
see this text because the Velocity Templating Engine will
ignore it.
*#
Here is text outside the multi-line comment; it is visible.
在使用Velocity引擎解析上面的模板时，输出的结果是：
This is text that is outside the multi-line comment.
Online visitors can see it.
Here is text outside the multi-line comment; it is visible.
可以看到，多行注释内的内容是不会输出的。
下面的例子阐明了注释的用法：
This text is visible. This text is not.
This text is visible.
This text is visible. #* This text, as part of a multi-line comment,
is not visible. This text is not visible; it is also part of the
multi-line comment. This text still not visible. *# This text is outside
the comment, so it is visible.
This text is not visible.
用Velocity引擎解析上面的模板，输出的结果是：
This text is visible. This text is visible.
This text is visible. This text is outside
the comment, so it is visible.
在VTL中还有第三种注释：VTL注释块。VTL注释块用来保存如文档的作者、版本号等信息。例如：
#
This is a VTL comment block and
may be used to store such information
as the document author and versioning
information:
@author
@version 5
*#
转载于:https://www.cnblogs.com/toSeeMyDream/p/5574805.html
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