java 使用反斜杠在速度中转义美元符号不起作用
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Escaping the dollar sign in velocity using backslash not working
提问by Abinash Ktheitroadala
I have the following segment to get rendered from a velocity template file.
我有以下片段可以从速度模板文件中渲染。
xyz $$foo
The dollar signs need to be escaped from VTL parser. And in the template file I represented it as
美元符号需要从 VTL 解析器中转义。在模板文件中，我将其表示为
xyz $$foo
I expect
我预计
xyz $$foo
but I get
但我明白了
xyz $foo
What am I doing wrong??
我究竟做错了什么？？
回答by Abinash Ktheitroadala
One of the way is to use a fixed string variable i.e, setting a variable for the $ sign and then using it.
一种方法是使用固定的字符串变量，即为 $ 符号设置一个变量，然后使用它。
#set ( $d = "$")
xyz ${d}${d}foo
It gives the expected output
它给出了预期的输出
xyz $$foo
回答by sonofrage
You might also want to check out the EscapeToolin velocity.
您可能还想查看EscapeTool的速度。
Once you have included it in context (e.g. under the name "esc"), you can use ${esc.d} to get the dollar sign. The method is you mentioned is easier for this particular case though.
一旦您将它包含在上下文中（例如，在名称“esc”下），您就可以使用 ${esc.d} 来获取美元符号。不过，您提到的方法对于这种特殊情况更容易。
I thought it was worth mentioning because it provides several other convenient methods to escape strings appropriate, if your templates are generating Java/javascript/html etc.
我认为值得一提，因为它提供了其他几种方便的方法来适当地转义字符串，如果您的模板正在生成 Java/javascript/html 等。
回答by jumpnett
It might also be helpful to use Velocity's NumberTool.
使用 Velocity 的NumberTool也可能会有所帮助。
It has a built in currency formatter:
它有一个内置的货币格式化程序：
$myNumber -> 13.55
$number.format($myNumber) -> 13.6
$number.currency($myNumber) -> .55
$number.integer($myNumber) -> 13
