import org.apache.commons.lang3.StringUtils;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* 0 - 9999999999999
*/
public class TermInfoUtils {
static Logger logger
= Logger.getLogger(
TermInfoUtils.class.getName());
public static void main(String[] args) {
generateUnionDeviceId(9999999999999l);
}
/**
* https://en.wikipedia.org/wiki/Base62#/
* wiki上的标准
*/
private final static char[] charArray = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".toCharArray();
/**
* base10 转 base 62
*
* @param base10
* @return
*/
public static String fromBase10ToBase62(long base10) {
int scale = 62;
StringBuilder sb = new StringBuilder();
long remainder = 0;
do {
remainder = base10 % scale;
sb.append(charArray[(int) remainder]);
base10 = base10 / scale;
} while (base10 > scale - 1);
sb.append(charArray[(int) base10]);
// 倒序
return sb.reverse().toString();
}
/**
* 产生银联终端号
*
* @param base10
* @return
*/
public static String generateUnionDeviceId(long base10) {
String base62 = fromBase10ToBase62(base10);
// 往左补 0
logger.log(Level.INFO, base62 + "==============" + base10);
return StringUtils.leftPad(base62, 8, "0");
}
}