/**
* 生成订单编号：站点编号前三位 + [5,12]位自增编号
*
* @param siteCode
* @return
* @author jqlin
*/
private String getOrderNo(String siteCode) {
String result = siteCode.length() <= 3 ? siteCode : siteCode.substring(0, 3);
result = result.toUpperCase();
try {
String orderNoIncr = "orderNoIncr";
if(!RedisUtil.exists(orderNoIncr)) {
RedisUtil.set(orderNoIncr, "0");
}
//根据redis生成自增ID
Long seq = RedisUtil.incr(orderNoIncr);
if(seq == null || seq == 0L) {
//根据mysql生成自增ID
seq = (Long)idDao.save(new IdModel());
result = result + "DB" + Util.getSequence(seq);
} else {
result = result + Util.getSequence(seq);
}
} catch (Exception e) {
//根据内存生成自增ID
result = result + "MM" + String.valueOf(Math.abs(UUID.randomUUID().getMostSignificantBits())).substring(0, 8);
}
return result;
}
/**
* 自增编号范围在[10000,999999999999]，不足补0
*
* @param seq
* @return
* @author jqlin
*/
public static String getSequence(long seq) {
long defaultLength = 9999L;
long maxLength = 999999999999L;
if(seq >= maxLength) {
return String.valueOf(maxLength);
}
if(seq > defaultLength) {
return String.valueOf(seq);
}
int len = 5 - String.valueOf(seq).length();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < len; i++) {
sb.append('0');
}
sb.append(seq);
return sb.toString();
}
