spring mvc 3.2 + mybatis3.2 + freeMarker

package com.roland.util; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.Random; public class DateUtil { @SuppressWarnings("static-access") /** * 返回当前时间+天数 * @param nowTime 2012-06-05) * @param number 3 * @return 2012-06-08 00:00:00 */ public static String after(String nowTime, Integer number) { String time = ""; String pattern = "yyyy-MM-dd"; SimpleDateFormat sdf = new SimpleDateFormat(pattern); Date now = null; try { now = sdf.parse(nowTime); } catch (ParseException e) { e.printStackTrace(); } Calendar c = Calendar.getInstance(); c.setTime(now); c.add(Calendar.DAY_OF_MONTH, number); time = c.get(c.YEAR) + "-" + ((c.get(Calendar.MONTH) + 1) < 10 ? "0" + (c.get(Calendar.MONTH) + 1) : (c.get(Calendar.MONTH) + 1)) + "-" + (c.get(Calendar.DAY_OF_MONTH) < 10 ? "0" + c.get(Calendar.DAY_OF_MONTH) : c.get(Calendar.DAY_OF_MONTH)) + " " + (c.get(Calendar.HOUR_OF_DAY) < 10 ? "0" + c.get(Calendar.HOUR_OF_DAY) : c.get(Calendar.HOUR_OF_DAY)) + ":" + (c.get(Calendar.MINUTE) < 10 ? "0" + c.get(Calendar.MINUTE) : c.get(Calendar.MINUTE)) + ":" + (c.get(Calendar.SECOND) < 10 ? "0" + c.get(Calendar.SECOND) : c.get(Calendar.SECOND)); return time; } // 当前时间 public static String timeToString(Date date) { String pattern = "yyyy-MM-dd HH:mm:ss"; SimpleDateFormat sdf = new SimpleDateFormat(pattern); return sdf.format(date); } public static String timeNow() { String pattern = "yyyy-MM-dd HH:mm:ss"; SimpleDateFormat sdf = new SimpleDateFormat(pattern); return sdf.format(new Date()); } public static String timeToString(Date date, String pattern) { SimpleDateFormat sdf = new SimpleDateFormat(pattern); return sdf.format(date); } // string转成规定格式 public static String stringToTime(String data, String pattern) throws Exception { DateFormat fmt = new SimpleDateFormat(pattern); Date date = fmt.parse(data); return fmt.format(date); } // 两个时间相减 public static double jisuan(String startTime, String endTime,String pattern) throws Exception { SimpleDateFormat sdf = new SimpleDateFormat(pattern); Date start = sdf.parse(startTime); Date end = sdf.parse(endTime); long cha = end.getTime() - start.getTime(); double result = cha * 1.0 / (1000 * 60 * 60); return result; } public static void main(String[] args) throws Exception { String type = "yyyy-MM-dd HH:mm"; String start = "2013-4-16 11:40"; String now = "2013-4-17 12:40"; System.out.println(jisuan(start, now, type)); } /** * 生成随即的名字 * * @param fileName * @return */ public static String generateFileName(String fileName) { String formatDate = new SimpleDateFormat("yyMMddHHmmss").format(new Date()); int random = new Random().nextInt(10000); int position = fileName.lastIndexOf("."); String extension = fileName.substring(position); return formatDate + random + extension; } /** * 今天的路径 * * @param imgTypeFor * @return */ public static String addressRadom() { Date date = new Date(); String uploadMM = DateUtil.timeToString(date, "yyyy/MM"); String uploadDD = DateUtil.timeToString(date, "dd"); String uploadDir = uploadMM + "/" + uploadDD + "/"; return uploadDir; } /** * 图片类型 * * @param imgName * @return */ public static String imgType(String imgName) { try { int position = imgName.lastIndexOf("."); String imgType = imgName.substring(position); return imgType; } catch (Exception e) { e.printStackTrace(); return null; } } }