Zhouyinjun1996: 继续优化 [code=java] public Integer calcAgeByIdCard(String idCard) { try { DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd"); LocalDate birthday = LocalDate.parse(idCard.substring(6,14),formatter); return Period.between(birthday, LocalDate.now()).getYears(); } catch (Exception e) { return null; } } [/code]

「已注销」: 论基础知识储备量的重要性。赞一个，老铁。

半层楼: 请问调度很耗时的任务 怎么处理

Zhouyinjun1996: 利用jdk1.8time包，更简洁有效的方式[code=java] public int calcAge(String idCard) { try { int year = Integer.parseInt(idCard.substring(6, 10)); int month = Integer.parseInt(idCard.substring(10, 12)); int dayOfMonth = Integer.parseInt(idCard.substring(12, 14)); LocalDate birthday = LocalDate.of(year, month, dayOfMonth); return Period.between(birthday, LocalDate.now()).getYears(); }catch (Exception e) { //发生任何异常快速返回一个无效值 return -1; } } [/code]

qq_31459039: update mysql.user set authentication_string=password('123456789') where user='root'; 这sql有问题 应该是 password字段 还有设置完后需要 flush privileges;