content: package com.example.liangmutian.mypicker;
  
  import android.util.Log;
  
  import java.text.SimpleDateFormat;
  import java.util.ArrayList;
  import java.util.Calendar;
  import java.util.Date;
  import java.util.List;
  
  /**
   * Created by lmt on 16/7/6.
   */
  public class DateUtil {
  
      public static final String ymdhms = "yyyy-MM-dd HH:mm:ss";
      public static final String ymd = "yyyy-MM-dd";
  
      public static String monthNumToMonthName(String month) {
          String m = month;
          if ("1".equals(month)) {
              m = "一月份";
          } else if ("2".equals(month)) {
              m = "二月份";
          } else if ("3".equals(month)) {
              m = "三月份";
          } else if ("4".equals(month)) {
              m = "四月份";
          } else if ("5".equals(month)) {
              m = "五月份";
          } else if ("6".equals(month)) {
              m = "六月份";
          } else if ("7".equals(month)) {
              m = "七月份";
          } else if ("8".equals(month)) {
              m = "八月份";
          } else if ("9".equals(month)) {
              m = "九月份";
          } else if ("10".equals(month)) {
              m = "十月份";
          } else if ("11".equals(month)) {
              m = "十一月份";
          } else if ("12".equals(month)) {
              m = "十二月份";
          }
          return m;
      }
  
      public static String getTomorrow() {
          Calendar calendar = Calendar.getInstance();
          calendar.add(Calendar.DAY_OF_MONTH, 1);
          int year = calendar.get(Calendar.YEAR);
          int month = calendar.get(Calendar.MONTH) + 1;
          int day = calendar.get(Calendar.DAY_OF_MONTH);
          return year + "-" + (month > 9 ? month : ("0" + month)) + "-" + day;
      }
  
      public static int getYear() {
          Calendar calendar = Calendar.getInstance();
          return calendar.get(Calendar.YEAR);
      }
  
      public static String getToday() {
          Calendar calendar = Calendar.getInstance();
          int year = calendar.get(Calendar.YEAR);
          int month = calendar.get(Calendar.MONTH) + 1;
          int day = calendar.get(Calendar.DAY_OF_MONTH);
          return year + "-" + (month > 9 ? month : ("0" + month)) + "-" + day;
      }
  
      public static List<Integer> getDateForString(String date) {
          String[] dates = date.split("-");
          List<Integer> list = new ArrayList<>();
          list.add(Integer.parseInt(dates[0]));
          list.add(Integer.parseInt(dates[1]));
          list.add(Integer.parseInt(dates[2]));
          return list;
      }
  
      public static Calendar getCalendar(Date date) {
          Calendar calendar = Calendar.getInstance();
          calendar.setTime(date);
          return calendar;
      }
  
  
      public static String formatDate(String date, String format) {
          String resultD = date;
          SimpleDateFormat sdf = new SimpleDateFormat(format);
          try {
              Date d = sdf.parse(date);
              resultD = sdf.format(d);
          } catch (Exception e) {
              e.printStackTrace();
          }
          return resultD;
      }
  
      public static String formatDate(long milliseconds, String format) {
          String resultD = "";
          SimpleDateFormat sdf = new SimpleDateFormat(format);
          try {
              Date d = new Date(milliseconds);
              resultD = sdf.format(d);
          } catch (Exception e) {
              e.printStackTrace();
          }
          return resultD;
      }
  
      public static Date formatDateStr(String date, String format) {
          SimpleDateFormat sdf = new SimpleDateFormat(format);
          Date date1 = null;
          try {
              date1 = sdf.parse(date);
          } catch (Exception e) {
              e.printStackTrace();
          }
          return date1;
      }
  
      /**
       * 通过年份和月份 得到当月的日子
       *
       * @param year
       * @param month
       * @return
       */
      public static int getMonthDays(int year, int month) {
          month++;
          switch (month) {
              case 1:
              case 3:
              case 5:
              case 7:
              case 8:
              case 10:
              case 12:
                  return 31;
              case 4:
              case 6:
              case 9:
              case 11:
                  return 30;
              case 2:
                  if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) {
                      return 29;
                  } else {
                      return 28;
                  }
              default:
                  return -1;
          }
      }
  
      /**
       * 返回当前月份1号位于周几
       *
       * @param year  年份
       * @param month 月份，传入系统获取的，不需要正常的
       * @return 日：1		一：2		二：3		三：4		四：5		五：6		六：7
       */
      public static int getFirstDayWeek(int year, int month) {
          Calendar calendar = Calendar.getInstance();
          calendar.set(year, month, 1);
          Log.d("DateView", "DateView:First:" + calendar.getFirstDayOfWeek());
          return calendar.get(Calendar.DAY_OF_WEEK);
      }
  
      public static String getDayWeek(int year, int month, int day) {
          Calendar calendar = Calendar.getInstance();
          calendar.set(year, month, day);
          Log.d("DateView", "DateView:First:" + calendar.getFirstDayOfWeek());
  
          switch (calendar.get(Calendar.DAY_OF_WEEK)) {
              case 1:
                  return "周日";
  
              case 2:
                  return "周一";
  
              case 3:
                  return "周二";
  
              case 4:
                  return "周三";
  
              case 5:
                  return "周四";
  
              case 6:
                  return "周五";
  
              case 7:
                  return "周六";
  
              default:
                  return "";
  
          }
      }
  }
  