解決code唯一碼(java)簡便方法

	public String next() {
		long appBootTimes = systemVariableService.getAppBootTimes();
		return Long.toString(appBootTimes * 10000000000000000l + seq.incrementAndGet(), Character.MAX_RADIX);
	}

　　解釋:找資料庫中的最近新增的賬號

public String nextNo() {
		return Long.toString(seq.incrementAndGet());
}

public String nextTradeNo() {
		return "T" + LocalDate.now().format(DateTimeFormatter.ofPattern("uuuuMMdd")) + next();
	}

public String nextFileName(String suffix) {
		return LocalDate.now().format(DateTimeFormatter.ofPattern("uuuuMMdd")) + "/" + UUID.randomUUID() + (StringUtils.isNotBlank(suffix) ? ("." + suffix) : "");
	}

public String nextPurchaseNo(){
		return "PO"+LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd")) + "-" + systemVariableService.getPurchaseNumbers("PO");
	}

public String nextSalesNo(){
		System.out.println(systemVariableService.getSalesNumbers("SO"));
		return "SO"+LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd")) + "-" + systemVariableService.getSalesNumbers("SO");
	}

public String nextReceiptNo(){
		return "SI"+LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd")) + "-" + systemVariableService.getReceiptNumbers("SI");
	}

public String nextLoadingListNo(){
		return "LL"+LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd")) + "-" + systemVariableService.getLoadingListNumbers("LL");
	}

public String nextDeliverNo(){
		return "DL"+LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd")) + "-" + systemVariableService.getDeliverNumbers("DL");
	}

public String nextOtherInNo(){
		return "OI"+LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd")) + "-" + systemVariableService.getOtherInNumbers("OI");
	}

public String nextOtherOutNo(){
		return "OO"+LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd")) + "-" + systemVariableService.getOtherOutNumbers("OO");
	}

public String nextPromotionNo(){
		return "HD"+LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd")) + "-" + systemVariableService.nextPromotionNo("HD");
	}

public String nextBalanceFeeNo() {
		return "FT" + systemVariableService.getBalanceFeeNumbers();
	}

　　以上的方法,都比較的好用和方便。其實這些我都要百度，是同事寫的，真強！