从句子中提取短语的java算法

Question

我一直致力于实现从句子中提取短语的算法。每个短语必须包含2到5个单词。例如，我有一句话“这篇文章是关于我想测试它”。我需要从这句话中得到一个包含以下短语的数组：

1. 本文
2. 这篇文章是
3. 这篇课文是关于
4. 这篇课文是关于我的
5. 文本是
6. 文本是关于
7. 文本是关于我的
8. 文本是关于我的愿望
9. 是关于
10. 是关于我的
11. 是关于我的愿望
12. 是关于我的愿望
13. 关于我的
14. 关于我的愿望
15. 关于我的愿望
16. 关于我的考试愿望
17. 我的愿望
18. 我希望
19. 我想测试一下
20. 我想测试一下
21. 想
22. 想测试一下吗
23. 想试试吗
24. 检验
25. 测试它
26. 测试一下

在PHP中，我从以下代码开始：

$text = 'This text is about my wish to test it';
$words = explode(' ', $text); 
// $words = ['This', 'text', 'is', 'about', 'my', 'wish', 'to', 'test', 'it']

请帮我实现主算法。它可以通过任何其他编程语言（C、Java、Python），而不仅仅是PHP

Answer 1

我需要的算法代码：

$text = 'This text is about my wish to test it';
$words = explode(' ', $text);
$wordsCount = count($words);

for ($i = 0; $i < $wordsCount; $i++) {
    $window = 2;
    $windowEnd = 5;
    if ($i + $windowEnd > $wordsCount) {
        $windowEnd = $wordsCount - $i;
    }
    if ($windowEnd < $window) {
        break;
    }
    while ($window <= $windowEnd) {
        for ($j = $i; $j < $i + $window; $j++) {
            echo $words[$j], "\n";
        }
        echo "\n";
        $window++;
    }
}

Answer 2

在爪哇

String text = "This text is about my wish to test it";

int indexFirst = 0;
while (indexFirst > -1 && text.length() > indexFirst +1) {
    int indexLast = text.indexOf(" ", indexFirst + 1);
    indexLast = text.indexOf(" ", indexLast + 1);
    while (indexLast > -1 && text.length() > indexLast + 1) {
        System.out.println(text.substring(indexFirst, indexLast));
        indexLast = text.indexOf(" ", indexLast + 1);
    }
    System.out.println(text.substring(indexFirst));
    indexFirst = text.indexOf(" ", indexFirst + 1);
}

返回

This text
This text is
This text is about
This text is about my
This text is about my wish
This text is about my wish to
This text is about my wish to test
This text is about my wish to test it
 text is
 text is about
 text is about my
 text is about my wish
 text is about my wish to
 text is about my wish to test
 text is about my wish to test it
 is about
 is about my
 is about my wish
 is about my wish to
 is about my wish to test
 is about my wish to test it
 about my
 about my wish
 about my wish to
 about my wish to test
 about my wish to test it
 my wish
 my wish to
 my wish to test
 my wish to test it
 wish to
 wish to test
 wish to test it
 to test
 to test it
 test it