java大文件异步上传

package com.test.web.util; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.Locale; import org.apache.log4j.Logger; /** * 描述:用于普通的日期转换 * * @author: 王冲 * @version: v1.0 */ public class DateUtil { private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); private static GregorianCalendar gcal; private static Calendar cal = Calendar.getInstance(); private final static Logger log = Logger.getLogger(DateUtil.class); // 根据STR要求返回当前时间 public static String getDateNow(final String str) { Calendar ca = Calendar.getInstance(); Date dt = ca.getTime(); sdf = new SimpleDateFormat(str); return sdf.format(dt); } // 将字符串转换成日�? public static Date strtodate(String str) throws ParseException { // String str = "2006-04-05"; java.util.Date date = new java.util.Date(); date = sdf.parse(str); return date; } // 将日期转换成字符�? public static String datetostr(Date data) { if (data == null) return ""; String str = sdf.format(data); try { data = sdf.parse(str); } catch (ParseException e) { log.error(e.getMessage(), e); } return sdf.format(data); } // 获得本周�?��日期 public static String getMonday(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY); return sdf.format(c.getTime()); } /** * 取得当天之前的某几天 * * @param amount */ public static String getDayBeforeOrAfterCurrentDay(int amount) { gcal = new GregorianCalendar(); gcal.add(GregorianCalendar.DATE, amount); return sdf.format(gcal.getTime()); } /** * 实现给定某日期，判断是星期几.�?008-03-11�?星期�? */ public static String getDayInWeekStr(Date date) { // "E"表示"day in week" SimpleDateFormat formatD = new SimpleDateFormat(" E "); return formatD.format(date); } /** * 实现给定某日期，判断是星期几.�?008-03-11�?2 */ public static int getDayInWeekNum(Date date) { cal.setTime(date); int w = cal.get(java.util.Calendar.DAY_OF_WEEK) - 1; if (w == 0) w = 7; return w; } /** * day�?7,表示7天前的日�? */ public static Date otherDate(int day) { cal.add(Calendar.DATE, day); Date d = cal.getTime(); return d; } /** * 返回系统时间 时间的格式为"yyyy-MM-dd" * * @return */ public static String getSysTime() { SimpleDateFormat format = new SimpleDateFormat("", Locale.SIMPLIFIED_CHINESE); format.applyPattern("yyyy-MM-dd"); String time = format.format(new Date()); return time; } /** * 返回系统时间 时间的格式为"yyyy-MM-dd HH:mm:ss" * * @return */ public static Date stringToDateHHmmss(String s) { SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date sult = null; try { sult = date.parse(s); } catch (ParseException e) { log.error(e.getMessage(), e); } return sult; } public static String getNextDate(String date) { Calendar cal = Calendar.getInstance(); try { cal.setTime(sdf.parse(date)); } catch (ParseException e) { log.error(e.getMessage(), e); } cal.add(Calendar.DAY_OF_YEAR, +1); String nextDate = sdf.format(cal.getTime()); return nextDate; } /** * 根据格式，获取日期字符串 * * @param date * 日期 * @param pattern * 格式，如yyyy-MM-dd */ public static String formatDate(Date dateTime, String pattern) { SimpleDateFormat f = new SimpleDateFormat(pattern); return f.format(dateTime); } /** * 根据格式，字符串转换为日期类�? * * @param dateTime * @param pattern * 格式，如yyyy-MM-dd HH:mm:ss */ public static Date parseDate(String dateTime, String pattern) { Date curdate = null; try { SimpleDateFormat sdf = new SimpleDateFormat(pattern); curdate = sdf.parse(dateTime); } catch (Exception ex) { log.error(ex.getMessage(), ex); } return curdate; } /** * 返回当前月的�?���?��str 格式(yyyy-MM-dd) */ public static String getMonthEndDate(String str) { try { Date date = strtodate(str); cal.set(cal.YEAR, date.getYear() + 1900); cal.set(cal.MONTH, date.getMonth()); String time = String.valueOf(date.getYear() + 1900) + String.valueOf(date.getMonth() + 1) + cal.getActualMaximum(cal.DAY_OF_MONTH); return time; } catch (ParseException e) { e.printStackTrace(); } return null; } }