package com.web.backend.util; import java.util.Calendar; import java.util.Date; /**  * @Author: SongZS  * @Description: 通过生日获取年龄计算工具  * @Date: Created in 18:23 2018/8/16  * @Modified By:  */ public class GetAgeByBirthdayUtil {

public static int getAgeByBirthday(Date birthday) {
            int age = 0;         try {
                Calendar calendar= Calendar.getInstance();             calendar.setTime(new Date());             Calendar birthday = Calendar.getInstance();             birthday.setTime(birthday);             if (birthday.after(calendar)) {
                    age = 0;             } else {
                    age = calendar.get(Calendar.YEAR) - birthday.get(Calendar.YEAR);                 if (calendar.get(Calendar.DAY_OF_YEAR) > birthday.get(Calendar.DAY_OF_YEAR)) {
                        age += 1;                 }             }             return age;         } catch (Exception e) {
                e.printStackTrace();             return 0;         }     } }

　　使用

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Date bithday = format.parse("Birthday");int age = GetAgeByBirthUtil.getAgeByBirthday(bithday);System.out.println(age);