Question

我的文件包含一些行，例如

"This is a string." = "This is a string's content."
" Another \" example \"" = " New example."
"My string
can have several lines." = "My string can have several lines."

我需要提取子字符串：

This is a string.
This is a string's content.
 Another \" example \"
 New example.
My string
can have several lines.
My string can have several lines.

这是我的代码：

String regex = "\".*?\"\\s*?=\\s*?\".*?\"";
Pattern pattern = Pattern.compile(regex,Pattern.DOTALL);
Matcher matcher = pattern.matcher(file);

目前，我可以获得“=”的左右两部分。但是当我的子串包含“\”时，我的正则表达式做得不对。

有人可以帮我写正确的正则表达式吗？我试过\“^ [\\”]而不是\“，但它不起作用..

谢谢你。

Answer 1

List<String> matchList = new ArrayList<String>();
Pattern regex = Pattern.compile(
    "\"          # Match a quote\n" +
    "(           # Capture in group number 1:\n" +
    " (?:        # Match either...\n" +
    "  \\\\.     # an escaped character\n" +
    " |          # or\n" +
    "  [^\"\\\\] # any character except quotes or backslashes\n" +
    " )*         # Repeat as needed\n" +
    ")           # End of capturing group\n" +
    "\"          # Match a quote", 
    Pattern.COMMENTS);
Matcher regexMatcher = regex.matcher(subjectString);
while (regexMatcher.find()) {
    matchList.add(regexMatcher.group(1));
}

Answer 2

对不起，我在一个我无法测试的地方，但确实

\".*?(?:[^\\]\")\\s*=\\s*\".*?(?:[^\\]\")

工作？

我刚刚更换了 \" 同 (?:[^\\]\") 所以如果他们之前的字符是\就不会匹配。

Answer 3

/"([^"\\]*(?:\\.[^"\\]*)*)"/

Source。 Also see this previous question

提取引号之间的子字符串忽略\“

3 个答案: