Java Grails：拆分包含管道的字符串
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Grails: Splitting a string that contains a pipe
提问by Tom
I'm trying to split a String. Simple examples work:
我正在尝试拆分String. 简单的例子工作：
groovy:000> print "abc,def".split(",");
[abc, def]===> null
groovy:000>
But instead of a comma, I need to split it on pipes, and I'm not getting the desired result:
但不是逗号，我需要在管道上拆分它，但我没有得到想要的结果：
groovy:000> print "abc|def".split("|");
[, a, b, c, |, d, e, f]===> null
groovy:000>
So of course my first choice would be to switch from pipes (|) to commas (,) as delimiters.
所以当然我的第一选择是从管道 ( |)切换到逗号 ( ,) 作为分隔符。
But now I'm intrigued: Why is this not working? Escaping the pipe (\|) doesn't seem to help:
但现在我很好奇：为什么这不起作用？转义管道 ( \|) 似乎没有帮助：
groovy:000> print "abc|def".split("\|");
ERROR org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed, groovysh_parse: 1: unexpected char: '\' @ line 1, column 24.
print "abcdef".split("\|");
^
1 error
|
at java_lang_Runnable$run.call (Unknown Source)
groovy:000>
采纳答案by Skip Head
You need to split on \\|.
你需要在\\|.
回答by mfloryan
You have to escape pipe as, indeed, it has a special meaning in the regular expression. However, if you use quotes, you have to escape the slash as well. Basically, two options then:
您必须转义管道，因为它确实在正则表达式中具有特殊含义。但是，如果使用引号，则还必须转义斜杠。基本上，有两种选择：
asserts "abc|def".split("\|") == ['abc','def']
or using the /as string delimiter to avoid extra escapes
或使用/as 字符串分隔符来避免额外的转义
asserts "abc|def".split(/\|/) == ['abc','def']
