正则表达式匹配句子 [英] Regular expression match a sentence

问题描述

如何匹配Hello world或Hello World形式的句子。句子可能包含 - / digit 0-9。任何信息对我都非常有帮助。谢谢。

How can I match a sentence of the form "Hello world" or "Hello World". The sentence may contain "- / digit 0-9". Any information will be very helpful to me. Thank you.

推荐答案

这个会做得很好。我对句子的定义：句子以非空格开头，以句号，感叹号或问号（或字符串结尾）结束。在结束标点符号后可能会有结束语。

This one will do a pretty good job. My definition of a sentence: A sentence begins with a non-whitespace and ends with a period, exclamation point or a question mark (or end of string). There may be a closing quote following the ending punctuation.

[^。！？\ ts] [^。！？] *（？ [！？]（？！[ '] \s | $）[^。！？] *）* [。！？] [']（= \s | $）<？ / code>

[^.!?\s][^.!?]*(?:[.!?](?!['"]?\s|$)[^.!?]*)*[.!?]?['"]?(?=\s|$)

import java.util.regex.*;
public class TEST {
    public static void main(String[] args) {
        String subjectString = 
        "This is a sentence. " +
        "So is \"this\"! And is \"this?\" " +
        "This is 'stackoverflow.com!' " +
        "Hello World";
        String[] sentences = null;
        Pattern re = Pattern.compile(
            "# Match a sentence ending in punctuation or EOS.\n" +
            "[^.!?\\s]    # First char is non-punct, non-ws\n" +
            "[^.!?]*      # Greedily consume up to punctuation.\n" +
            "(?:          # Group for unrolling the loop.\n" +
            "  [.!?]      # (special) inner punctuation ok if\n" +
            "  (?!['\"]?\\s|$)  # not followed by ws or EOS.\n" +
            "  [^.!?]*    # Greedily consume up to punctuation.\n" +
            ")*           # Zero or more (special normal*)\n" +
            "[.!?]?       # Optional ending punctuation.\n" +
            "['\"]?       # Optional closing quote.\n" +
            "(?=\\s|$)", 
            Pattern.MULTILINE | Pattern.COMMENTS);
        Matcher reMatcher = re.matcher(subjectString);
        while (reMatcher.find()) {
            System.out.println(reMatcher.group());
        } 
    }
}

这是输出：

这是一个句子。

所以这个 ！

并且是这个？

这是' stackoverflow.com！'

Hello World

匹配所有这些都正确（最后一句话没有结束标点符号），结果似乎并不那么容易！

Matching all of these correctly (with the last sentence having no ending punctuation), turns out to be not so easy as it seems!

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