在Java中使用正則表達式轉換字符串

Question

我正在嘗試替換此字符串：

String str2 = "/EMOTIONS_TAX/29027000/Points Of Interest/totem,"
          + "/EMOTIONS_TAX/29044000/Places/Italia,"
          + "/EMOTIONS_TAX/29027000/Military Equipment";

進入：

String str2 = "/EMOTIONS_TAX/22/Points Of Interest/totem,"
           + "/EMOTIONS_TAX/22/Places/Italia,"
           + "/EMOTIONS_TAX/22/Military Equipment/sica";

所以，我想用"22"替換字符串中的所有長數字。

你能解釋一下我該怎么做嗎？

預先感謝您的任何答復。

Answer 1

如果您只想替換長數字，只需按如下方式通過regex即可實現：

    String str2 = "/EMOTIONS_TAX/29027000/Points Of Interest/totem,"
    + "/EMOTIONS_TAX/29044000/Places/Italia,"
    + "/EMOTIONS_TAX/29027000/Military Equipment";

    str2 = str2.replaceAll("\\d+", "22");

結果將是：

/EMOTIONS_TAX/22/Points Of Interest/totem,/EMOTIONS_TAX/22/Places/Italia,/EMOTIONS_TAX/22/Military Equipment

更新

作為OP的要求，OP實際上嘗試從字符串中檢索數字，解決方案應該是：

    String str2 = "/EMOTIONS_TAX/29027000/Points Of Interest/totem,"
                  + "/EMOTIONS_TAX/29044000/Places/Italia,"
                  + "/EMOTIONS_TAX/29027000/Military Equipment";

    Pattern pattern = Pattern.compile("\\d+");
    Matcher matcher = pattern.matcher(str2);
    while(matcher.find()) {
        System.out.println(matcher.group());
    }

和輸出：

29027000
29044000
29027000

Answer 2

String result = str2.replaceAll("/\\\d+/", "/22/");