时间格式转换（Date String）

    /** * 传入具体一天，返回具体日期减少一天
    	 * * @throws ParseException
    	 */
    	public static String subDay(String date) {
    		final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    		Date dt = null;
    		try {
    			dt = sdf.parse(date);
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		final Calendar rightNow = Calendar.getInstance();
    		rightNow.setTime(dt);
    		rightNow.add(Calendar.DATE, -1);
    		final Date dt1 = rightNow.getTime();
    		final String reStr = sdf.format(dt1);
    		return reStr;
    
    	}
    
    	/** * @param dateInMs
    	 *            传入的时间long值
    	 * @param days
    	 *            天数 如 -1 +1
    	 * @return
    	 */
    	public static String getDateByLong(long dateInMs, int days) {
    		final long curDateInMs = dateInMs + days * 24 * 60 * 60 * 1000;
    		return dateFormatter.format(new Date(curDateInMs));
    	}
    
    	/** * 时间(yyyy-MM-dd HH:mm:ss):String格式转Date格式
    	 */
    	public static Date parseTimeFormattoDate(String date) {
    		Date time = null;
    		try {
    			time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(date);
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return time;
    	}
    
    	/** * 时间(yyyy-MM-dd HH:mm:ss):Date格式转String格式
    	 */
    	public static String parseTimeToString(Date date) {
    		final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    		return sdf.format(date);
    	}
    
    	/** * 时间(yyyy-MM-dd):String格式转Date格式
    	 */
    	public static Date parseTimeFormattoDayDate(String date) {
    		Date time = null;
    		try {
    			time = new SimpleDateFormat("yyyy-MM-dd").parse(date);
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return time;
    	}
    
    	/** * 时间(yyyy-MM-dd):Date格式转String格式
    	 */
    	public static String parseTimeFormattoDayDate(Date date) {
    		String time = null;
    		try {
    			time = new SimpleDateFormat("yyyy-MM-dd").format(date);
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return time;
    	}
    
    	/** * 时间(yyyy-MM):Date格式转String格式
    	 */
    	public static String parseTimeFormattoMonthDate(Date date) {
    		String time = null;
    		try {
    			time = new SimpleDateFormat("yyyy-MM").format(date);
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return time;
    	}
    
    	/** * 获取：昨天22:00 今天22:00
    	 * * @return
    	 */
    	public static Map<String, String> getDay() {
    		final Map<String, String> dayMap = new HashMap<>();
    		final Date date = new Date();
    		final SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
    		final String format = df.format(date);
    		final String todayDate = format + " 22:00:00";
    		final Calendar calendar = Calendar.getInstance();
    		calendar.add(Calendar.DATE, -1);
    		final Date time = calendar.getTime();
    		final String format2 = df.format(time);
    		final String beforeDate = format2 + " 22:00:00";
    		dayMap.put("todayDate", todayDate);
    		dayMap.put("beforeDate", beforeDate);
    		return dayMap;
    	}
    
    	/** * 时间(yyyy-MM):String格式转Date格式
    	 */
    	public static Date parseTimeFormattoMonthDate(String date) {
    		Date time = null;
    		try {
    			time = new SimpleDateFormat("yyyy-MM").parse(date);
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return time;
    	}
    
    
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
    
    代码解读