如流水号需要在数字前自动补齐0,至指定位数。
如果已经达到了指定位数,不会补齐,返回原数值。
自定义
/**
* 自动补齐位数
* @param length 补齐后的位数
* @param num 待补齐的数值
* @return
*/
public static String pad(int length,long num){
return String.format("%0".concat(String.valueOf(length)).concat("d"), num);
}
hutool
StrUtil.padPre(str, 4, '0');
顺序单号生成
# 单据格式 SW01-2022-0001 ~ SW01-2022-9999
private int no = 10000;
private String createOrderNo(WineMonthMaster lastWineMonthMaster) {
String prefix = "SW01";
String year = StrUtil.toString(DateUtil.year(new Date()));
if(ObjectUtil.isNotEmpty(lastWineMonthMaster)){
List<String> strList = Arrays.asList(lastWineMonthMaster.getOrderNo().split("-"));
String yearLibrary = strList.get(1);
int sequence = NumberUtil.parseInt(1 + strList.get(2));
if(year.equals(yearLibrary) && no < sequence){
no = sequence;
}
}
++no;
return prefix + "-" + year + "-" + StrUtil.toString(no).substring(1);
}
标签:java,String,no,sequence,位数,year,补齐
From: https://www.cnblogs.com/fuqian/p/16798358.html