Java子字符串方法: How to remove all non-alphanumerical characters?

Question

我想从此字符串以及类似的其他类型的字符串中删除所有非字母数字字符

Unable_to_locate_element_{"method""link_text","selector""ikljbhfvdesiofsdjkl"}

因此，我可以使用此字符串来生成此代码中的屏幕截图的名称:

    private String generateRandomFilename(Throwable arg0) {
      Calendar c = Calendar.getInstance();

      String filename = arg0.getMessage();
      int i = filename.indexOf('\n');
      filename = filename.substring(0, i).replaceAll("\\s", "_").replaceAll(":", "") + ".jpg";
      filename = "" + c.get(Calendar.YEAR) + 
          "-" + c.get(Calendar.MONTH) + 
          "-" + c.get(Calendar.DAY_OF_MONTH) +
          "-" + c.get(Calendar.HOUR_OF_DAY) +
          "-" + c.get(Calendar.MINUTE) +
          "-" + c.get(Calendar.SECOND) +
          "-" + filename;

      return filename;
  }

现在的情况是，我的文件创建失败了，因为没有删除所有坏字符。

Answer 1

试试这个

str = str.replaceAll("\\P{Alnum}", "");