最好使用正则表达式或 Stringtokenizer 来查找作者和书名：William Faulkner - “Light In August”
最好使用 regex 或 Stringtokenizer 来分隔此字符串中的作者和标题：
William Faulkner - 'Light In August'
这是最简单的 regex 吗？
Pattern pattern = Pattern.compile("^\\s*([^-]+)-.*$");
Matcher matcher = pattern.matcher("William Faulkner - 'Light In August'");
String author = matcher.group(1).trim();
String bookTitle = matcher.group(2).trim();
这是多余的还是有更简单的方法来使用 Stringtokenizer 来做到这一点？
基本上，我正在寻找最透明和可维护的解决方案，因为我对 regex 没有很好的理解，并且获得了上述解决方案的帮助。
Is it better to use regex or Stringtokenizer to separate the author and title in this string:
William Faulkner - 'Light In August'
Is this the simplest regex that would work?
Pattern pattern = Pattern.compile("^\\s*([^-]+)-.*$");
Matcher matcher = pattern.matcher("William Faulkner - 'Light In August'");
String author = matcher.group(1).trim();
String bookTitle = matcher.group(2).trim();
Is that overkill or is there a simpler way to do this with a Stringtokenizer?
Basically I'm looking for the most transparent and maintainable solution since I don't have a good understanding of regex and got help with the one above.
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评论（3）
您对输入有多少控制权？您能否保证作者和标题始终由
" - "（空格、破折号和空格）分隔？您确定作者不会包含" - "吗？等等。如果输入非常严格，那么您可以简单地使用
String#split()，这应该会让你非常清楚你在做什么。 不要使用 StringTokenizer (Mark Byers 的回答向您展示了如何使用
split()。但是，如果您必须担心输入中的更多变化（例如，破折号周围的空白数量是否可变或根本不存在？），那么使用正则表达式将变得简洁明了。权衡是代码的可读性和意图的清晰度。
How much control do you have over the input? Can you guarantee that author and title will always be separated by
" - "(a space, a dash, and a space)? Do you know for sure that the author won't contain" - "? And so on.If the input is quite rigid, then you can simply use
String#split(), which should make it very clear what you're doing. Don't use a StringTokenizer (source):Mark Byers' answer shows you how to use
split().However, if you have to worry about more variation in the input (e.g., can the whitespace amount of whitespace around the dash be variable or not exist at all?) then using a regex will be terse and concise. The tradeoff then is code readability and clarity of intent.
这取决于输入的样子。例如，您的正则表达式对于包含连字符的作者姓名将失败。
也许类似的东西
可能更合适一些。
It depends on what the input looks like. Your regex, for example, would fail on author names that contain a hyphen.
Perhaps something like
might fit a little better.
使用
String.split怎么样？ideone
需要注意的一件事是，某些作者的姓名和书名包含连字符，因此仅用连字符分割就可以了一般来说并不总是有效。
How about using
String.split?ideone
One thing to watch out for is that some authors' names and book titles contain hyphens so splitting just on a hyphen won't always work in general.