/**

  • 把数字转换成字母
  • @param answerContent 1,2,3

  • @return
    */
    private static String convertFlag(String answerContent) {
    answerContent = answerContent.substring(1, answerContent.length() - 1);
    String[] optionArr = answerContent.split(",");
    StringBuffer buffer = new StringBuffer();
    for (String option :optionArr){
    if (ObjectUtil.isNotNull(option) && !"0".equals(option)){
    int answer = Integer.parseInt(option.trim());
    //把数字转换成字母
    char c1=(char) (answer+64);
    buffer.append(String.valueOf(c1));
    }
    }
    //把字母进行排序
    answerContent = buffer.toString();
    answerContent= mySort(answerContent);
    return answerContent;
    }

    public static String mySort(String source){
    char[] chs = source.toCharArray();//将字符串转换成char数组
    Arrays.sort(chs);//对数组进行排序
    source = new String(chs);
    return source;
    }
    public static void main(String[] args) {
    //把数字转换成字母
    String answerContent =convertFlag("[1,3,2]");
    System.out.println(answerContent);
    }