java - 如何更改 java 中的正则表达式搜索以忽略大小写

Question

如何更改以下代码，使其不关心大小写？

public static String tagValue(String inHTML, String tag)
            throws DataNotFoundException {
        String value = null;
        Matcher m = null;

        int count = 0;
        try {

        String searchFor = "<" + tag + ">(.*?)</" + tag + ">";

        Pattern pattern = Pattern.compile(searchFor);

         m = pattern.matcher(inHTML);


            while (m.find()) {
                count++;


                return inHTML.substring(m.start(), m.end());
                // System.out.println(inHTML.substring(m.start(), m.end()));
            }
        } catch (Exception e) {
            throw new DataNotFoundException("Can't Find " + tag + "Tag.");
        }

        if (count == 0) {
            throw new DataNotFoundException("Can't Find " + tag + "Tag.");

        }

        return inHTML.substring(m.start(), m.end());

    }

Answer 1

给Pattern.CASE_INSENSITIVE标记为Pattern.compile :

String searchFor = "<" + tag + ">(.*?)</" + tag + ">";
Pattern pattern = Pattern.compile(searchFor, Pattern.CASE_INSENSITIVE);
m = pattern.matcher(inHTML);

(哦，考虑 parsing XML/HTML instead of using a regular expression to match a nonregular language 。)