ascii 是 用 16 進制表示字符

public static void main(String[] args) {
        String HexStr = "30 32 43 35 2C 31 2C 31 2C 23 30 23";
        String[] hexChars = HexStr.split(" ");
        StringBuffer sb = new StringBuffer();
        for(String ch:hexChars) {
            
            sb.append((char)Integer.parseInt(ch,16));
        }
        
        System.out.println(sb.toString());
    }