时间获取和转换TimeUtils

import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;/** * Created by TAO_SX on 2016/4/10/010. */public class TimeUtils {    public static final SimpleDateFormat DEFAULT_DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");    public static final SimpleDateFormat DATE_FORMAT_DATE    = new SimpleDateFormat("yyyy-MM-dd");    public static final SimpleDateFormat DATE_FORMAT_DATE_NOT_0    = new SimpleDateFormat("yyyy-M-d");    private static Calendar calendar;    private TimeUtils() {        throw new AssertionError();    }    /**     * long time to string     *     * @param timeInMillis     * @param dateFormat     * @return     */    public static String getTime(long timeInMillis, SimpleDateFormat dateFormat) {        return dateFormat.format(new Date(timeInMillis));    }    public static String getToday() {        SimpleDateFormat formatter  = new  SimpleDateFormat("yyyy-MM-dd");        Date curDate =  new Date(System.currentTimeMillis());        String   str   =   formatter.format(curDate);        return str;    }    public static String     getEndday() {        SimpleDateFormat formatter  = new  SimpleDateFormat("yyyy-MM-dd");        Date curDate =  new Date(System.currentTimeMillis());        Calendar   calendar   =   new GregorianCalendar();        calendar.setTime(curDate);//        calendar.add(calendar.YEAR, 1);//把日期往后增加一年.整数往后推,负数往前移动//        calendar.add(calendar.DAY_OF_MONTH, 1);//把日期往后增加一个月.整数往后推,负数往前移动        calendar.add(calendar.DATE,5);//把日期往后增加一天.整数往后推,负数往前移动//        calendar.add(calendar.WEEK_OF_MONTH, 1);//把日期往后增加一个月.整数往后推,负数往前移动        curDate=calendar.getTime();   //这个时间就是日期往后推一天的结果//        System.out.println(date.toString());        String   str   =   formatter.format(curDate);        return str;    }    public static Calendar getDate() {        // Calendar 取得当前时间的方法        // 初始化 (重置) Calendar 对象        calendar = Calendar.getInstance();        // 或者用 Date 来初始化 Calendar 对象        calendar.setTime(new Date());        return calendar;    }    /**     * long time to string, format is {@link #DEFAULT_DATE_FORMAT}     *     * @param timeInMillis     * @return     */    public static String getTime(long timeInMillis) {        return getTime(timeInMillis, DEFAULT_DATE_FORMAT);    }    /**     * get current time in milliseconds     *     * @return     */    public static long getCurrentTimeInLong() {        return System.currentTimeMillis();    }    /**     * get current time in milliseconds, format is {@link #DEFAULT_DATE_FORMAT}     *     * @return     */    public static String getCurrentTimeInString() {        return getTime(getCurrentTimeInLong());    }    /**     * get current time in milliseconds     *     * @return     */    public static String getCurrentTimeInString(SimpleDateFormat dateFormat) {        return getTime(getCurrentTimeInLong(), dateFormat);    }    /**     * 只到年月     * @param date     * @return     */    public static String getTime(Date date) {        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM");        return format.format(date);    }    public static String GetTimeNot0(String string) {        Date currentTime = new Date(string);//得到当前时间        return DATE_FORMAT_DATE_NOT_0.format(currentTime); //将日期时间格式化    }}