日期格式工具类

import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import android.annotation.SuppressLint;/** * 日期格式工具类 *  */@SuppressLint("SimpleDateFormat")public class DateUtil {/** * 得到日期字符 *  * @return 日期格式：yyyyMMdd */public static String getDateStr() {SimpleDateFormat dateFm = new SimpleDateFormat("yyyyMMdd"); // 格式化当前系统日期String dateTime = dateFm.format(new java.util.Date());return dateTime;}/** * 得到日期 *  * @return 日期格式：yyyy-MM-dd */public static String getDateDay() {SimpleDateFormat dateFm = new SimpleDateFormat("yyyy-MM-dd"); // 格式化当前系统日期String dateTime = dateFm.format(new java.util.Date());return dateTime;}/** * 得到日期时间 *  * @return 日期格式：yyyy-MM-dd hh:mm:ss */public static String getDateTime() {SimpleDateFormat dateFm = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); // 格式化当前系统日??String dateTime = dateFm.format(new java.util.Date());return dateTime;}/** * 得到日期时间 *  * @return 日期格式：yyyyMMddhhmmss */public static String getDateTimem() {SimpleDateFormat dateFm = new SimpleDateFormat("yyyyMMddhhmmss"); // 格式化当前系统日??String dateTime = dateFm.format(new java.util.Date());return dateTime;}private static final String FORMAT = "yyyy-MM-dd HH:mm:ss";public static final String FORMATACT = "yyyy-MM-dd HH:mm";public static Date str2Date(String str) {return str2Date(str, null);}public static Date str2Date(String str, String format) {if (str == null || str.length() == 0) {return null;}if (format == null || format.length() == 0) {format = FORMAT;}Date date = null;try {SimpleDateFormat sdf = new SimpleDateFormat(format);date = sdf.parse(str);} catch (Exception e) {e.printStackTrace();}return date;}public static Calendar str2Calendar(String str) {return str2Calendar(str, null);}public static Calendar str2Calendar(String str, String format) {Date date = str2Date(str, format);if (date == null) {return null;}Calendar c = Calendar.getInstance();c.setTime(date);return c;}public static String date2Str(Calendar c) {// yyyy-MM-dd HH:mm:ssreturn date2Str(c, null);}public static String date2Str(Calendar c, String format) {if (c == null) {return null;}return date2Str(c.getTime(), format);}public static String date2Str(Date d) {// yyyy-MM-dd HH:mm:ssreturn date2Str(d, null);}public static String date2Str(Date d, String format) {// yyyy-MM-dd HH:mm:ssif (d == null) {return null;}if (format == null || format.length() == 0) {format = FORMAT;}SimpleDateFormat sdf = new SimpleDateFormat(format);String s = sdf.format(d);return s;}public static String getCurDateStr() {Calendar c = Calendar.getInstance();c.setTime(new Date());return c.get(Calendar.YEAR) + "-" + (c.get(Calendar.MONTH) + 1) + "-"+ c.get(Calendar.DAY_OF_MONTH) + "-"+ c.get(Calendar.HOUR_OF_DAY) + ":" + c.get(Calendar.MINUTE)+ ":" + c.get(Calendar.SECOND);}/** * 获得当前日期的字符串格式 *  * @param format * @return */public static String getCurDateStr(String format) {Calendar c = Calendar.getInstance();return date2Str(c, format);}// 格式到秒public static String getMillon(long time) {return new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(time);}// 格式到天public static String getDay(long time) {return new SimpleDateFormat("yyyy-MM-dd").format(time);}// 格式到毫秒public static String getSMillon(long time) {return new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss-SSS").format(time);}/** * 得到日期时间 *  * @return 日期格式：yyyyMMddhhmmss */public static String getDateTimem(long millis) {SimpleDateFormat dateFm = new SimpleDateFormat("yyyyMMddHHmmss"); // 格式化当前系统日String dateTime = dateFm.format(new Date(millis));return dateTime;}/** *  * @功能 TODO * @param mDate1 ApplyStartTime * @param mDate2 ApplyEndTime * @param mDate3 ActStartTime * @param mDate4 ActiEndTime * @return :  *                -1:未知 *                0:未开始 *                1:开始报名 *                2:报名结束 *                3:活动开始 *                4:活动结束 * */public static int getActState(String mDate1, String mDate2, String mDate3,String mDate4) {Date Date01 = DateUtil.str2Date(mDate1, DateUtil.FORMATACT);Date Date02 = DateUtil.str2Date(mDate2, DateUtil.FORMATACT);Date Date03 = DateUtil.str2Date(mDate3, DateUtil.FORMATACT);Date Date04 = DateUtil.str2Date(mDate4, DateUtil.FORMATACT);Date NowDate = new Date();if (NowDate.before(Date01)) {return 0;} else if (NowDate.after(Date01) && NowDate.before(Date02)) {return 1;} else if (NowDate.after(Date02) && NowDate.before(Date03)) {return 2;} else if (NowDate.after(Date03) && NowDate.before(Date04)) {return 3;} else if (NowDate.after(Date04)) {return 4;}return -1;}}