用于将引用的字符串与转义引号相匹配的Java Regex [英] Java Regex for matching quoted string with escaped quotes

问题描述

我知道我已经有很多问题，但是我没有发现任何在Java中有用的答案。所以我写了一个新的问题。

我有这样的内容的文本文件：

 
 key1 =这是一个使用'\\'字符转义的\test\文本; 
 key2 ='它必须使用\'单个'''引号和双引号'; 
 

我需要一个与双引号（或单引号）中的值匹配的正则表达式。此正则表达式必须支持转义的引号和转义的反斜杠。
正则表达式必须适用于Java标准模式/匹配器类。

解决方案

请尝试使用此正则表达式：

 '（[^ \\'] + | \\（[btnfr'\\] | [0 -3] [0-7] {1,2} |？U [0-9A-FA-F] {4}））*'| （[^ \\] + | \\（ [btnfr'\\] | [0-3]？[0-7] {1,2} | u [0-9a-fA-F] {4}））*
  

作为字符串文字：

   '（[^ \\\\'] + | \\\\（[btnfr\'\\\\] | [0-3] ？[0-7] {1,2} | U [0-9A-FA-F] {4}））*'| \ （[^ \\\\\] + | \\\\（[btnfr\'\\\\] | [0-3] [0-7] {1,2} |？U [0-9A-FA- F] {4}））* \
  




I know there are already many questions like mine but I found no answer which works in Java. So I write a new question.

I have text files with content like this:

key1 = "This is a \"test\" text with escapes using '\\' characters";
key2 = 'It must work with \'single\' quotes and "double" quotes';

I need a regular expression which matches the values in the double-quotes (or single-quotes). This regular expression must support the escaped quotes and escaped backslashes. The regular expression must work with Java standard Pattern/Matcher classes.

解决方案

Try this regular expression:

'([^\\']+|\\([btnfr"'\\]|[0-3]?[0-7]{1,2}|u[0-9a-fA-F]{4}))*'|"([^\\"]+|\\([btnfr"'\\]|[0-3]?[0-7]{1,2}|u[0-9a-fA-F]{4}))*"

And as a string literal:

"'([^\\\\']+|\\\\([btnfr\"'\\\\]|[0-3]?[0-7]{1,2}|u[0-9a-fA-F]{4}))*'|\"([^\\\\\"]+|\\\\([btnfr\"'\\\\]|[0-3]?[0-7]{1,2}|u[0-9a-fA-F]{4}))*\""

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