java中十六进制字符串转ASCII码

    
    public static String hexToAscii(String hexStr) {
        StringBuilder output = new StringBuilder("");
        for (int i = 0; i < hexStr.length(); i += 2) {
            String str = hexStr.substring(i, i + 2);
            output.append((char) Integer.parseInt(str, 16));
        }
        return output.toString();
    }

   System.out.println(hexToAscii("45474D31303930303031"));//输出：EGM1090001