java - 提取包含特定单词的句子

Question

我想获取文本文件中包含特定关键字的句子。我尝试了很多，但无法获得包含关键字的正确句子......我有不止一组关键字，如果其中任何一个与该段落匹配，则应该采用它。例如:如果我的文本文件包含抢劫、抢劫等单词，那么应该提取该句子。下面是我尝试过的代码。无论如何，有没有使用正则表达式来解决这个问题。任何帮助将不胜感激。

  BufferedReader br1 = new BufferedReader(new FileReader("/home/pgrms/Documents/test/one.txt"));
    String str="";

    while(br1 .ready()) 
    {
        str+=br1 .readLine() +"\n";

    }
Pattern re = Pattern.compile("[^.!?\\s][^.!?]*(?:[.!?](?!['\"]?\\s|$)[^.!?]*)*[.!?]?['\"]?(?=\\s|$)", Pattern.MULTILINE | Pattern.COMMENTS);
Matcher match = re.matcher(str);
String sentenceString="";
while (match .find())
{
    sentenceString=match.group(0);
    System.out.println(sentenceString);
}

Answer 1

以下是当您有预定义关键字列表时的示例:

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.regex.*;
public class Tester {

    public static void main(String [] args){
        try {
            BufferedReader br1 = new BufferedReader(new FileReader("input"));
            String[] words = {"robbery","robbed", "robbers"};
            String word_re = words[0];   
            String str="";

            for (int i = 1; i < words.length; i++)
                word_re += "|" + words[i];
            word_re = "[^.]*\\b(" + word_re + ")\\b[^.]*[.]";
            while(br1.ready()) { str += br1.readLine(); }
            Pattern re = Pattern.compile(word_re, 
                    Pattern.MULTILINE | Pattern.COMMENTS | 
                    Pattern.CASE_INSENSITIVE);
            Matcher match = re.matcher(str);
            String sentenceString="";
            while (match .find()) {
                sentenceString = match.group(0);
                System.out.println(sentenceString);
            }
        } catch (Exception e) {}
    }

}

这将创建以下形式的正则表达式:

[^.]*\b(robbery|robbed|robbers)\b[^.]*[.]