public static String addZeroForNum(String str, int strLength) { |
int strLen = str.length(); |
if (strLen < strLength) { |
while (strLen < strLength) { |
StringBuffer sb = new StringBuffer(); |
sb.append( "0" ).append(str); // 左补0 |
// sb.append(str).append("0");//右补0 |
str = sb.toString(); |
strLen = str.length(); |
} |
} |
|
return str; |
} |