输入结果 00000000000567

String bala="567";

固定长度是14位，怎么循环在bala前面填充00000000000
System.out.println("---www.javaweb.top--------");
String bala = "567";
        StringBuffer sb = new StringBuffer(17);
        sb.append(bala);
        while (sb.length() < 17) {
            sb.insert(0, 0);
        }
        System.out.println(sb.toString());