“glob”类型模式是否有相当于java.util.regex的等价物？(Is there an equivalent of java.util.regex for “glob” type patte

“glob”类型模式是否有相当于java.util.regex的等价物？(Is there an equivalent of java.util.regex for “glob” type patterns?)

有没有一个标准（最好是Apache Commons或类似的非病毒）库，用于在Java中进行“glob”类型的匹配？ 当我不得不在Perl中做类似的时候，我把所有的“ . ”改为“ \. ”，“ * ”到“ .* ”和“ ? ”到“”这样的事情，但是我我想知道有人为我做了工作吗？

类似的问题： 从glob表达式创建正则表达式

Is there a standard (preferably Apache Commons or similarly non-viral) library for doing "glob" type matches in Java? When I had to do similar in Perl once, I just changed all the "." to "\.", the "*" to ".*" and the "?" to "." and that sort of thing, but I'm wondering if somebody has done the work for me.

Similar question: Create regex from glob expression

最满意答案

没有什么内置的，但是将glob类似的转换为正则表达式很简单：

public static String createRegexFromGlob(String glob) { String out = "^"; for(int i = 0; i < glob.length(); ++i) { final char c = glob.charAt(i); switch(c) { case '*': out += ".*"; break; case '?': out += '.'; break; case '.': out += "\\."; break; case '\\': out += "\\\\"; break; default: out += c; } } out += '$'; return out; }

这对我来说很有用，但是我不知道它是否涵盖了“标准”，如果有的话

Paul Tomblin的更新：我发现一个执行glob转换的Perl程序，并将其适用于Java我最终得到：

private String convertGlobToRegEx(String line) { LOG.info("got line [" + line + "]"); line = line.trim(); int strLen = line.length(); StringBuilder sb = new StringBuilder(strLen); // Remove beginning and ending * globs because they're useless if (line.startsWith("*")) { line = line.substring(1); strLen--; } if (line.endsWith("*")) { line = line.substring(0, strLen-1); strLen--; } boolean escaping = false; int inCurlies = 0; for (char currentChar : line.toCharArray()) { switch (currentChar) { case '*': if (escaping) sb.append("\\*"); else sb.append(".*"); escaping = false; break; case '?': if (escaping) sb.append("\\?"); else sb.append('.'); escaping = false; break; case '.': case '(': case ')': case '+': case '|': case '^': case '$': case '@': case '%': sb.append('\\'); sb.append(currentChar); escaping = false; break; case '\\': if (escaping) { sb.append("\\\\"); escaping = false; } else escaping = true; break; case '{': if (escaping) { sb.append("\\{"); } else { sb.append('('); inCurlies++; } escaping = false; break; case '}': if (inCurlies > 0 && !escaping) { sb.append(')'); inCurlies--; } else if (escaping) sb.append("\\}"); else sb.append("}"); escaping = false; break; case ',': if (inCurlies > 0 && !escaping) { sb.append('|'); } else if (escaping) sb.append("\\,"); else sb.append(","); break; default: escaping = false; sb.append(currentChar); } } return sb.toString(); }

我正在编辑这个答案，而不是自己做，因为这个答案让我在正确的轨道上。

There's nothing built-in, but it's pretty simple to convert something glob-like to a regex:

public static String createRegexFromGlob(String glob) { String out = "^"; for(int i = 0; i < glob.length(); ++i) { final char c = glob.charAt(i); switch(c) { case '*': out += ".*"; break; case '?': out += '.'; break; case '.': out += "\\."; break; case '\\': out += "\\\\"; break; default: out += c; } } out += '$'; return out; }

this works for me, but I'm not sure if it covers the glob "standard", if there is one :)

Update by Paul Tomblin: I found a perl program that does glob conversion, and adapting it to Java I end up with:

private String convertGlobToRegEx(String line) { LOG.info("got line [" + line + "]"); line = line.trim(); int strLen = line.length(); StringBuilder sb = new StringBuilder(strLen); // Remove beginning and ending * globs because they're useless if (line.startsWith("*")) { line = line.substring(1); strLen--; } if (line.endsWith("*")) { line = line.substring(0, strLen-1); strLen--; } boolean escaping = false; int inCurlies = 0; for (char currentChar : line.toCharArray()) { switch (currentChar) { case '*': if (escaping) sb.append("\\*"); else sb.append(".*"); escaping = false; break; case '?': if (escaping) sb.append("\\?"); else sb.append('.'); escaping = false; break; case '.': case '(': case ')': case '+': case '|': case '^': case '$': case '@': case '%': sb.append('\\'); sb.append(currentChar); escaping = false; break; case '\\': if (escaping) { sb.append("\\\\"); escaping = false; } else escaping = true; break; case '{': if (escaping) { sb.append("\\{"); } else { sb.append('('); inCurlies++; } escaping = false; break; case '}': if (inCurlies > 0 && !escaping) { sb.append(')'); inCurlies--; } else if (escaping) sb.append("\\}"); else sb.append("}"); escaping = false; break; case ',': if (inCurlies > 0 && !escaping) { sb.append('|'); } else if (escaping) sb.append("\\,"); else sb.append(","); break; default: escaping = false; sb.append(currentChar); } } return sb.toString(); }

I'm editing into this answer rather than making my own because this answer put me on the right track.