Java生日计算年龄工具

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);