常见正则使用

实例：自动化脚本关键字扫描

  public static void main(String[] args) {
    String script = "echo \"hello world\"\n" +
        "rm -rf ./*\n" +
        "reboot";
    String keyWord = "rm -rf";
    String scriptStr = script.replaceAll("\\s"," ");
    if(keyWord.contains(" ")){
      System.out.println(scriptStr.contains(keyWord));
    }else{
      String rex = ".*\\b"+keyWord+"\\b.*";
      Pattern pattern = Pattern.compile(rex);

      Matcher matcher =pattern.matcher(scriptStr);
      System.out.println(matcher.matches());
    }

• 是否包含某个单词

.*\\breboot\\b.*