java时间格式转换

public class DateUtil {/** * 按照默认formatStr的格式，转化dateTimeStr为Date类型 dateTimeStr必须是formatStr的形式 * @param dateTimeStr * @param formatStr * @return */public static Date getDate(String dateTimeStr, String formatStr) {try {if (dateTimeStr == null || dateTimeStr.equals("")) {return null;}DateFormat sdf = new SimpleDateFormat(formatStr);java.util.Date d = sdf.parse(dateTimeStr);return d;} catch (ParseException e) {throw new RuntimeException(e);}}/** * 将YYYYMMDD转换成Date日期 * @param date * @return * @throws BusinessException */public static Date transferDate(String date) throws Exception {if (date == null || date.length() < 1)return null;if (date.length() != 8)throw new Exception("日期格式错误");String con = "-";String yyyy = date.substring(0, 4);String mm = date.substring(4, 6);String dd = date.substring(6, 8);int month = Integer.parseInt(mm);int day = Integer.parseInt(dd);if (month < 1 || month > 12 || day < 1 || day > 31)throw new Exception("日期格式错误");String str = yyyy + con + mm + con + dd;return DateUtil.getDate(str, "yyyy-MM-dd");}/** * 将YYYY－MM－DD日期转换成yyyymmdd格式字符串 * @param date * @return */public static String getYYYYMMDDDate(Date date) {if (date == null)return null;String yyyy = getYear(date) + "";String mm = getMonth(date) + "";String dd = getDay(date) + "";mm = rightAlign(mm, 2, "0");dd = rightAlign(dd, 2, "0");return yyyy + mm + dd;}/** * 将YYYY－MM－DD日期转换成YYYYMMDDHHMMSS格式字符串 * @param date * @return */public static String getYYYYMMDDHHMMSSDate(Date date) {if (date == null)return null;String yyyy = getYear(date) + "";String mm = getMonth(date) + "";String dd = getDay(date) + "";String hh = getHour(date) + "";String min = getMin(date) + "";String ss = getSecond(date) + "";mm = rightAlign(mm, 2, "0");dd = rightAlign(dd, 2, "0");hh = rightAlign(hh, 2, "0");min = rightAlign(min, 2, "0");ss = rightAlign(ss, 2, "0");return yyyy + mm + dd + hh + min + ss;}/** * 将YYYY－MM－DD日期转换成yyyymmdd格式字符串 *  * @param date * @return */public static String getYYYYMMDDDate(String date) {return getYYYYMMDDDate(getDate(date, "yyyy-MM-dd"));}/** * 将MM－DD－YYYY日期转换成yyyymmdd格式字符串 *  * @param date * @return */public static String getYYYYMMDDDate1(String date) {String[] dt=date.split("/");return dt[2]+(dt[0].length()>1?dt[0]:"0"+dt[0])+(dt[1].length()>1?dt[1]:"0"+dt[1]);}/** * 将Date转换成formatStr格式的字符串 * @param date * @param formatStr * @return */public static String dateToDateString(Date date, String formatStr) {DateFormat df = new SimpleDateFormat(formatStr);return df.format(date);}/** * 返回一个formatStr格式的日期时间字符串中的HH:mm:ss * @param dateTime * @param formatStr * @return */public static String getTimeString(String dateTime, String formatStr) {Date d = getDate(dateTime, formatStr);String s = dateToDateString(d,"yyyy-MM-dd HH:mm:ss");return s.substring("yyyy-MM-dd HH:mm:ss".indexOf('H'));}/** * 获取当前日期yyyy-MM-dd的形式 *  * @return */public static String getCurDate() {return dateToDateString(Calendar.getInstance().getTime(),"yyyy-MM-dd");}/** * 获取当前日期yyyy年MM月dd日的形式 * @return */public static String getCurZhCNDate() {return dateToDateString(new Date(), "yyyy年MM月dd日");}/** * 获取当前日期时间yyyy-MM-dd HH:mm:ss的形式 *  * @return */public static String getCurDateTime() {return dateToDateString(new Date(), "yyyy-MM-dd HH:mm:ss");}/** * 获取当前日期时间yyyy年MM月dd日HH时mm分ss秒的形式 *  * @return */public static String getCurZhCNDateTime() {return dateToDateString(new Date(), "yyyy年MM月dd日HH时mm分ss秒");}/** * 获取日期d的days天后的一个Date * @param d * @param days * @return */public static Date getInternalDateByDay(Date d, int days) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);now.add(Calendar.DATE, days);return now.getTime();}    /**     *      * @param d     * @param months     * @return     */public static Date getInternalDateByMon(Date d, int months) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);now.add(Calendar.MONTH, months);return now.getTime();}    /**     *      * @param d     * @param years     * @return     */public static Date getInternalDateByYear(Date d, int years) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);now.add(Calendar.YEAR, years);return now.getTime();}    /**     *      * @param d     * @param sec     * @return     */public static Date getInternalDateBySec(Date d, int sec) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);now.add(Calendar.SECOND, sec);return now.getTime();}    /**     *      * @param d     * @param min     * @return     */public static Date getInternalDateByMin(Date d, int min) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);now.add(Calendar.MINUTE, min);return now.getTime();}    /**     *      * @param d     * @param hours     * @return     */public static Date getInternalDateByHour(Date d, int hours) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);now.add(Calendar.HOUR_OF_DAY, hours);return now.getTime();}/** * 根据一个日期字符串，返回日期格式，目前支持4种 如果都不是，则返回null *  * @param DateString * @return */public static String getFormateStr(String DateString) {String patternStr1 = "[0-9]{4}-[0-9]{1,2}-[0-9]{1,2}"; // "yyyy-MM-dd"String patternStr2 = "[0-9]{4}-[0-9]{1,2}-[0-9]{1,2}\\s[0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2}"; // "yyyy-MM-ddString patternStr3 = "[0-9]{4}年[0-9]{1,2}月[0-9]{1,2}日";// "yyyy年MM月dd日"String patternStr4 = "[0-9]{4}年[0-9]{1,2}月[0-9]{1,2}日[0-9]{1,2}时[0-9]{1,2}分[0-9]{1,2}秒";// "yyyy年MM月dd日HH时mm分ss秒"Pattern p = Pattern.compile(patternStr1);Matcher m = p.matcher(DateString);boolean b = m.matches();if (b)return "yyyy-MM-dd";p = Pattern.compile(patternStr2);m = p.matcher(DateString);b = m.matches();if (b)return "yyyy-MM-dd HH:mm:ss";p = Pattern.compile(patternStr3);m = p.matcher(DateString);b = m.matches();if (b)return "yyyy年MM月dd日";p = Pattern.compile(patternStr4);m = p.matcher(DateString);b = m.matches();if (b)return "yyyy年MM月dd日HH时mm分ss秒";return null;}/** * 将一个"yyyy-MM-dd HH:mm:ss"字符串，转换成"yyyy年MM月dd日HH时mm分ss秒"的字符串 * @param dateStr * @return */public static String getZhCNDateTime(String dateStr) {Date d = getDate(dateStr,"yyyy-MM-dd HH:mm:ss");return dateToDateString(d, "yyyy年MM月dd日HH时mm分ss秒");}/** * 将一个"yyyy-MM-dd"字符串，转换成"yyyy年MM月dd日"的字符串 *  * @param dateStr * @return */public static String getZhCNDate(String dateStr) {Date d = getDate(dateStr,"yyyy-MM-dd");return dateToDateString(d, "yyyy年MM月dd日");}/** * 将dateStr从fmtFrom转换到fmtTo的格式 *  * @param dateStr * @param fmtFrom * @param fmtTo * @return */public static String getDateStr(String dateStr, String fmtFrom, String fmtTo) {Date d = getDate(dateStr, fmtFrom);return dateToDateString(d, fmtTo);}/** * 比较两个"yyyy-MM-dd HH:mm:ss"格式的日期，之间相差多少毫秒,time2-time1 *  * @param time1 * @param time2 * @return */public static long compareDateStr(String time1, String time2) {Date d1 = getDate(time1,"yyyy-MM-dd HH:mm:ss");Date d2 = getDate(time2,"yyyy-MM-dd HH:mm:ss");return d2.getTime() - d1.getTime();}/** * 将小时数换算成返回以毫秒为单位的时间 * @param hours * @return */public static long getMicroSec(BigDecimal hours) {BigDecimal bd;bd = hours.multiply(new BigDecimal(3600 * 1000));return bd.longValue();}/** * 获取Date中的分钟 * @param d * @return */public static int getMin(Date d) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);return now.get(Calendar.MINUTE);}/** * 获取Date中的小时(24小时) * @param d * @return */public static int getHour(Date d) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);return now.get(Calendar.HOUR_OF_DAY);}/** * 获取Date中的秒 * @param d * @return */public static int getSecond(Date d) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);return now.get(Calendar.SECOND);}/** * 获取xxxx-xx-xx的日 * @param d * @return */public static int getDay(Date d) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);return now.get(Calendar.DAY_OF_MONTH);}/** * 获取月份，1-12月 *  * @param d * @return */public static int getMonth(Date d) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);return now.get(Calendar.MONTH) + 1;}/** * 获取19xx,20xx形式的年 * @param d * @return */public static int getYear(Date d) {Calendar now = Calendar.getInstance(TimeZone.getDefault());now.setTime(d);return now.get(Calendar.YEAR);}/** * 得到d的上个月的年份+月份,如201005 * @param d * @return */public static String getYearMonthOfLastMon(Date d) {Date newdate = getInternalDateByMon(d, -1);String year = String.valueOf(getYear(newdate));String month = String.valueOf(getMonth(newdate));return year + month;}/** * 得到当前日期的年和月如200509 * @return String */public static String getCurYearMonth() {Calendar now = Calendar.getInstance(TimeZone.getDefault());String DATE_FORMAT = "yyyyMM";java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat(DATE_FORMAT);sdf.setTimeZone(TimeZone.getDefault());return (sdf.format(now.getTime()));}    /**     *      * @param year     * @param month     * @return     */public static Date getNextMonth(String year, String month) {String datestr = year + "-" + month + "-01";Date date = getDate(datestr, "yyyy-MM-dd");return getInternalDateByMon(date, 1);}    /**     *      * @param year     * @param month     * @return     */public static Date getLastMonth(String year, String month) {String datestr = year + "-" + month + "-01";Date date = getDate(datestr, "yyyy-MM-dd");return getInternalDateByMon(date, -1);}/** * @function:返回格式'yyyy-MM-dd'的系统当前日期。 * @retinfo:String，格式为'yyyy-MM-dd'的系统当前日期。 * @throws java.lang.Exception */public static String getSystemDate() throws Exception {Date dateSystem = new Date(System.currentTimeMillis());SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");return sdf.format(dateSystem);}/** * @function:返回格式'yyyy-MM-dd HH:mm:ss.SSS'的系统当前日期。 * @retinfo:String，格式为'yyyy-MM-dd HH:mm:ss.SSS'的系统当前日期。 * @throws java.lang.Exception */public static String getSystemDateTime() throws Exception {Date dateSystem = new Date(System.currentTimeMillis());SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");return sdf.format(dateSystem);}/** * 得到日期d，按照页面日期控件格式，如"2001-3-16" *  * @param d * @return */public static String getSingleNumDate(Date d) {return dateToDateString(d, "yyyy-MM-dd");}/** * 得到d半年前的日期,"yyyy-MM-dd" *  * @param d * @return */public static String getHalfYearBeforeStr(Date d) {return dateToDateString(getInternalDateByMon(d, -6), "yyyy-MM-dd");}/** * 得到当前日期D的月底的前/后若干天的时间,<0表示之前，>0表示之后 *  * @param d * @param days * @return */public static String getInternalDateByLastDay(Date d, int days) {return dateToDateString(getInternalDateByDay(d, days), "yyyy-MM-dd");}/** * 日期中的年月日相加 * @param field int 需要加的字段 年 月 日 * @param amount int 加多少 * @return String */public static String addDate(int field, int amount) {String dstr = addDate(null,field,amount);return dstr;} public static String addDate(String datastr,int field, int amount) {int temp = 0;if (field == 1) {temp = Calendar.YEAR;}if (field == 2) {temp = Calendar.MONTH;}if (field == 3) {temp = Calendar.DATE;}String dstr = "";Calendar cal = null ;try {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");if (!StringUtils.isBlank(datastr)) {Date d = getDate(datastr, "yyyy-MM-dd");    cal = Calendar.getInstance();cal.setTime(d);}else{cal = Calendar.getInstance(TimeZone.getDefault());}cal.add(temp, amount);dstr = sdf.format(cal.getTime());return dstr;} catch (Exception e) {e.printStackTrace();return null;}} /** * 日期转字符串 *  * @param date *            日期 * @param pattern *            格式 * @return */public static String dateToString(Date date, String pattern) {if (date != null) {SimpleDateFormat sdf = new SimpleDateFormat(pattern);return sdf.format(date);}return "";}/** * 日期转字符串 *  * @param date * @return */public static String dateToString(Date date) {return dateToString(date, "yyyy-MM-dd hh:mm:ss");}/** * 获得系统当前月份的天数 *  * @return */public static int getCurentMonthDay() {Date date = Calendar.getInstance().getTime();return getMonthDay(date);}/** * 获得指定日期月份的天数 * @param date * @return */public static int getMonthDay(Date date) {Calendar c = Calendar.getInstance();c.setTime(date);return c.getActualMaximum(Calendar.DAY_OF_MONTH);}/** * 获得指定日期月份的天数 yyyy-mm-dd * @param date * @return */public static int getMonthDay(String date) {Date strDate = getDate(date, "yyyy-MM-dd");return getMonthDay(strDate);}    /** *  * @param cal * @return */public static String getStringDate(Calendar cal) {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");return format.format(cal.getTime());}/** *  * @param source * @param length * @param fit * @return */public static String rightAlign(String source, int length, String fit) {String result = "";int div = length - source.length();String tmp = "";if (div > 0) {for (int i = 0; i < div; i++) {tmp += fit;}}result = tmp + source;return result;}    /** * 转换日期 * @param date * @return */public static Calendar getCalendar(String date,String formatStr){SimpleDateFormat sdf = new SimpleDateFormat(formatStr);Calendar cld = Calendar.getInstance();try {cld.setTime(sdf.parse(date));} catch (ParseException e) {e.printStackTrace();}return cld;}/** * 转换日期 * @param date * @return */public static String calendarToString(Calendar cal,String formatStr){if(cal==null){return "";}SimpleDateFormat sdf = new SimpleDateFormat(formatStr);String dateStr="";try {     dateStr = sdf.format(cal.getTime());} catch (Exception e) {e.printStackTrace();}return dateStr;}/** * 在dto对象中把int转为Date * @param intDate * @param formatStr * @return * @throws ParseException */public static Date getDateFormInt(int intDate , String formatStr) throws ParseException{if(intDate == 0){  //该日期为nullreturn null;}String dateStr = String.valueOf(intDate);if(formatStr .equals("yyyy-MM-dd") && dateStr.length()>=8){SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return format.parse(yyyy+"-"+MM+"-"+dd);}else if(formatStr .equals("MM/dd/yyyy") && dateStr.length()>=8){SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy");String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return format.parse(MM+"/"+dd+"/"+yyyy);}return null;} /**     * 把yyyyMMdd格式的整型日期转换为Date类型的日期     * @author hechuan     * @param dateInt     * @return     */    public static Date getYYYYMMddDateFromInt(int dateInt){        if(dateInt==0)return null;        return DateUtil.getDate(dateInt+"", "yyyyMMdd");    }/** * 在dto对象中把int转为字符窜格式的日期 * @param intDate  格式为 ：yyyyMMdd 的数字串 * @param formatStr * @return * @throws ParseException */public static String getDateStringFormInt(int intDate , String formatStr) throws ParseException{if(intDate == 0){  //该日期为nullreturn "";}String dateStr = String.valueOf(intDate);if(formatStr .equals("yyyy-MM-dd") && dateStr.length()>=8){SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return yyyy+"-"+MM+"-"+dd;}else if(formatStr .equals("yyyy/MM/dd") && dateStr.length()>=8){SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return yyyy+"/"+MM+"/"+dd;}else if(formatStr .equals("yyyy-MM") && dateStr.length()>=6){SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);return yyyy+"-"+MM;}else if(formatStr .equals("yyyy年MM月dd日") && dateStr.length()>=8){return DateUtil.getDateStr(intDate+"", "yyyyMMdd", formatStr);}else if(formatStr .equals("dd/MM/yyyy") && dateStr.length()>=8){SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy");String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return dd+"/"+MM+"/"+yyyy;}else if(formatStr .equals("MM/dd/yyyy") && dateStr.length()>=8){SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy");String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return MM+"/"+dd+"/"+yyyy;}else if(formatStr .equals("yyyy年MM月") && dateStr.length()>=6){String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);return yyyy+"年"+MM+"月";}//2011-08-25hechuan修改else if(formatStr .equals("MM/yyyy") && dateStr.length()>=6){String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);return MM+"/"+yyyy;}return null;}/** * 在dto对象中把long转为字符窜格式的日期 * @param longDate 格式为 ：yyyyMMdd HH:mm:ss 的long * @param formatStr * @return * @throws ParseException */public static String getDateStringFormLong(Long longDate , String formatStr) throws ParseException{if(longDate == 0){  //该日期为nullreturn "";}String dateStr = String.valueOf(longDate);if(formatStr .equals("yyyy-MM-dd HH:mm:ss") && dateStr.length()>=14){SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);String HH = dateStr.substring(8,10);String mm = dateStr.substring(10,12);String ss = dateStr.substring(12,14);return yyyy +"-"+ MM +"-"+ dd +" "+ HH +":"+ mm +":"+ ss;}else if(formatStr .equals("MM/dd/yyyyHH:mm:ss") && dateStr.length()>=14){String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);String HH = dateStr.substring(8,10);String mm = dateStr.substring(10,12);String ss = dateStr.substring(12,14);return  MM +"/"+yyyy+"/"+ dd + HH +":"+ mm +":"+ ss;}else if(formatStr .equals("MM/dd/yyyy HH:mm:ss") && dateStr.length()>=14){String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);String HH = dateStr.substring(8,10);String mm = dateStr.substring(10,12);String ss = dateStr.substring(12,14);return  MM +"/"+ dd +"/"+yyyy+" "+ HH +":"+ mm +":"+ ss;}else if(formatStr .equals("yyyy-MM-dd") && dateStr.length()>=8){String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return yyyy+"-"+MM+"-"+dd;}else if(formatStr .equals("yyyy/MM/dd") && dateStr.length()>=8){String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return yyyy+"/"+MM+"/"+dd;}//2011-08-25hechuan修改else if(formatStr .equals("MM/dd/yyyy") && dateStr.length()>=8){String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return MM+"/"+dd+"/"+yyyy;}else if(formatStr .equals("yyyy-MM") && dateStr.length()>=6){SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);return yyyy+"-"+MM;}//2011-08-25hechuan修改else if(formatStr .equals("MM/yyyy") && dateStr.length()>=6){String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);return MM+"/"+yyyy;}else if(formatStr .equals("yyyy-MM-dd HH:mm:ss SSS") && dateStr.length()>=17){return DateUtil.getDateStr(longDate+"", "yyyyMMddhhmmssSSS", formatStr);}else if(formatStr .equals("HH:mm:ss") && dateStr.length()>=14){SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String HH = dateStr.substring(8,10);String mm = dateStr.substring(10,12);String ss = dateStr.substring(12,14);return HH+":"+mm+":"+ss;}else if(formatStr .equals("yyyy年MM月dd日 hh时") && dateStr.length()>=10){return DateUtil.getDateStr(longDate+"", "yyyyMMddhhmmssSSS", formatStr);}else if(formatStr .equals("yyyy-MM-dd HH") && dateStr.length()>=10){return DateUtil.getDateStr(longDate+"", "yyyyMMddhhmmssSSS", formatStr);}//2011-08-25hechuan修改else if(formatStr .equals("MM/dd/yyyy HH") && dateStr.length()>=10){return DateUtil.getDateStr(longDate+"", "yyyyMMddhhmmssSSS", formatStr);}return null;}/** * 根据输入返回年月 * @param input * @return */public static String getYearMonth(String input){String[] tmp = input.split("-");String year = tmp[0];String month = tmp[1];if(month.length()==1 && Integer.parseInt(month) <= 9){month = "0"+month;}return year+month;}/** *  * @param input * @return */public static String getChinesDateStr(Object input){String dateStr="";String a = input.getClass().getName();if(input.getClass().getName().indexOf("java.lang.Integer") != -1){dateStr = String.valueOf(input);}else{dateStr = input.toString();}if (dateStr.length() == 6){return  dateStr.substring(0,4)+"年"+dateStr.substring(4,6)+"月";}else if(dateStr.length() == 8){return  dateStr.substring(0,4)+"年"+dateStr.substring(4,6)+"月"+dateStr.substring(6,8)+"日";}return "";}/**日期比较 * @param DATE1 * @param DATE2 * @return */public static int compare_date(String DATE1, String DATE2) {    DateFormat df = new SimpleDateFormat("yyyy-MM-dd");    try {        Date dt1 = df.parse(DATE1);        Date dt2 = df.parse(DATE2);        if (dt1.getTime() > dt2.getTime()) {            return 1;        } else if (dt1.getTime() < dt2.getTime()) {            return -1;        } else {            return 0;        }    } catch (Exception exception) {        exception.printStackTrace();    }    return 0;}/** * 根据当前时间获取时间控件开始时间(当前财年开始月份) * @return */public static String getDateFildBegin(){String beginMonth = "";Date todayDate=DateUtil.getDate(DateUtil.getCurDate(), "yyyy-MM");int bYYYY = DateUtil.getYear(todayDate);int bMM = DateUtil.getMonth(todayDate);int bDD = DateUtil.getDay(todayDate);if(bMM <=8)  {bYYYY = bYYYY-1;beginMonth= bYYYY + "-09";}else{beginMonth= bYYYY + "-09";}return beginMonth;}/** * 根据当前时间获取时间控件结束时间(当前月份) * @return */public static String getDateFildEnd(){String endMonth = "";Date todayDate = DateUtil.getDate(DateUtil.getCurDate(), "yyyy-MM");int eYYYY = DateUtil.getYear(todayDate);int eMM = DateUtil.getMonth(todayDate);if(eMM <=9)  {endMonth= eYYYY + "-0"+eMM;}else{endMonth= eYYYY +"-"+ eMM;}return endMonth;}/** * 退货查询的开始月份默认值(当前月份的前3个月) * @return */public static String getRtrDateFildBegin(){String beginMonth = "";Date todayDate = DateUtil.getDate(DateUtil.getCurDate(), "yyyy-MM");int bYYYY = DateUtil.getYear(todayDate);int bMM = DateUtil.getMonth(todayDate);if( (bMM-2)< 0 || (bMM-2) ==0 ){     //若果不输入,查询区间默认为当前月份的前三个月bYYYY = bYYYY-1;bMM = (bMM-2)+12;beginMonth = bYYYY+"-"+bMM;}else if ((bMM-2)>9){beginMonth = bYYYY+"-"+(bMM-2);}else{beginMonth = bYYYY+"-0"+(bMM-2);}return beginMonth;}/** * 把string的date 转为相应格式 * @param dateStr * @param formatStr * @return */public  static String changeDateStr(String dateStr ,String formatStr){if(formatStr .equals("yyyy-MM-dd HH:mm:ss") && dateStr.length()>=14){String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);String HH = dateStr.substring(8,10);String mm = dateStr.substring(10,12);String ss = dateStr.substring(12,14);return yyyy +"-"+ MM +"-"+ dd +" "+ HH +":"+ mm +":"+ ss;}else if(formatStr .equals("yyyy-MM-dd") && dateStr.length()>=8){SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return yyyy+"-"+MM+"-"+dd;}else if(formatStr .equals("MM/dd/yyyy") && dateStr.length()>=8){String yyyy = dateStr.substring(0,4);String MM = dateStr.substring(4,6);String dd = dateStr.substring(6,8);return MM +"/"+ dd +"/"+ yyyy;}return "";}