Python和Java之间RegEx语法的差异 [英] Differences in RegEx syntax between Python and Java
问题描述
我在Python中有一个正在运行的正则表达式，我正在尝试转换为Java。似乎实现中存在细微差别。
I have a working regex in Python and I am trying to convert to Java. It seems that there is a subtle difference in the implementations.
RegEx正试图匹配另一个注册表。有问题的RegEx是：
The RegEx is trying to match another reg ex. The RegEx in question is:
/(\\.|[^[/\\\n]|\[(\\.|[^\]\\\n])*])+/([gim]+\b|\B)
遇到问题的其中一个字符串是： / \s + /;
One of the strings that it is having problems on is: /\s+/;
reg ex不应与结尾; 匹配。在Python中，RegEx正常工作（并且与结束; 不匹配，但在Java中它确实包含; 。
The reg ex is not supposed to be matching the ending ;. In Python the RegEx works correctly (and does not match the ending ;, but in Java it does include the ;.
问题：
- 我该怎么做才能得到这个RegEx在Java中工作？
- 基于我读到的内容这里这个RegEx应该没有什么区别。在Python和Java中的RegEx实现之间是否存在差异列表？
- What can I do to get this RegEx working in Java?
- Based on what I read here there should be no difference for this RegEx. Is there somewhere a list of differences between the RegEx implementations in Python vs Java?
推荐答案
对于一小组案例，Java不会像Python那样解析正则表达式。在这种特殊情况下，嵌套的 [导致问题。在Python中你不需要转义任何嵌套的 [但你确实需要在Java中做到这一点。
Java doesn't parse Regular Expressions in the same way as Python for a small set of cases. In this particular case the nested ['s were causing problems. In Python you don't need to escape any nested [ but you do need to do that in Java.
原始的RegEx（对于Python）：
The original RegEx (for Python):
/(\\.|[^[/\\\n]|\[(\\.|[^\]\\\n])*])+/([gim]+\b|\B)
固定的RegEx（适用于Java和Python）：
The fixed RegEx (for Java and Python):
/(\\.|[^\[/\\\n]|\[(\\.|[^\]\\\n])*\])+/([gim]+\b|\B)
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