问题
I'm using freemarker to generate a freemarker template. But I need some way to escape freemarker tags.
How would I escape a <#list> tag or a ${expression} ?
回答1:
You could also use: ${"$"}{expression} if you find the {} nesting confusing.
回答2:
I'm using the alternative syntax feature. I start the template with [#ftl] and use this syntax.
For the expressions I use the string literal feature: ${r"${expression}"}
回答3:
In the case when you want to use non-raw strings so that you can escape double quotes, apostrophes, etc, you can do the following:
Imagine that you want to use the string ${Hello}-"My friend's friend" inside of a string. You cannot do that with raw strings. What I have used that works is:
${"\x0024{Hello}-\"My friend's friend\""}
I have not escaped the apostrophe since I used double quotes.
回答4:
You can configure FreeMarker to use [=exp] instead of ${exp} (since 2.3.28), and [#...]/[@...] instead of <#...>|<@...> by setting both the interpolation_syntax and the tag_syntax configuration setting to square_bracket (in the Java API: Configuration cfg; ... cfg.setInterpolationSyntax(Configuration.SQUARE_BRACKET_INTERPOLATION_SYNTAX) and cfg.setTagSyntax(Configuration.SQUARE_BRACKET_TAG_SYNTAX)). Then the syntax doesn't clash with the default syntax.
There's one tricky case; if the template starts with <#ftl>, then it will switch the tag syntax back to angle_bracket. To counter that, just add a [#ftl] line before it.
See also: https://freemarker.apache.org/docs/dgui_misc_alternativesyntax.html
来源：https://stackoverflow.com/questions/1641240/freemarker-escaping-freemarker