将管道插入 Java 模式表达式的正确方法是什么?
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What is the proper way of inserting a pipe into a Java Pattern expression?
提问by TheOne
What is the proper way of inserting a pipe into a Java Pattern expression?
将管道插入 Java 模式表达式的正确方法是什么?
I actually want to use a pipe as a delimiter and not the or operator.
我实际上想使用管道作为分隔符而不是 or 运算符。
I.E:
IE:
"hello|world".split("|"); --> {"hello", "world"}
采纳答案by newacct
in Java 1.5+:
在 Java 1.5+ 中:
"hello|world".split(Pattern.quote("|"));
回答by TheOne
"hello|world".split("\\|"); --> {"hello", "world"}
First set of "\\"
only yields the \ as the delimiter. Therefore 2 sets are needed to escape the pipe.
第一组"\\"
只产生 \ 作为分隔符。因此需要 2 套才能脱离管道。
回答by Kevin
Escape it with \\:
用\\转义它:
"hello|world".split("\|");
回答by Hank Gay
I have this problem a lot (encoding a regex into a Java String
), so I have bookmarked the regex tool at fileformat.info; it has a nifty function where it will show you the Java String
representation of a regex after you test it.
我经常遇到这个问题(将正则表达式编码为 Java String
),所以我在 fileformat.info 中为正则表达式工具添加了书签;它有一个漂亮的函数,它会String
在你测试之后向你显示正则表达式的 Java表示。