超市收银管理系统-毕业设计.zip

package com.xg.supermarket.utils; import com.xg.supermarket.config.ConstantsConfig; import com.xg.supermarket.exception.BizException; import tk.mybatis.mapper.util.StringUtil; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class DateUtil { public static Date getDate(String str){ DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");// 这里要与时间字符串的格式一样即可，否则报错 if(StringUtil.isEmpty(str)){ return null; } try { return dateFormat.parse(str); } catch (ParseException e) { throw new BizException("时间格式参数不正确，yyyy-MM-dd"); } } public static String toDate(Date date){ SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); return sdf.format(date); } /** * 日期是本月的第几天 * * @param date * 天 * @return 当前天数 * @throws ParseException * 数据转换异常 */ public static String getMostDay(String date) throws ParseException { // 当天日期是本月的第几天 SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); Date nowDay = format.parse(date); Calendar ca = Calendar.getInstance(); ca.setTime(nowDay); int num = ca.get(Calendar.DAY_OF_MONTH); String time = String.valueOf(num); return time; } /** * 获取日期在当月天数 * * @param date * 天 * @return 当月天数 * @throws Exception * 异常 */ public static String getMonthDay(String date) throws Exception { // 当前月最大日期 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Date dates = sdf.parse(date);// String-->Date Calendar calendar = Calendar.getInstance(); calendar.setTime(dates);// 设置日历时间 int day = calendar.getActualMaximum(Calendar.DAY_OF_MONTH); String mostDate = String.valueOf(day); return mostDate; } /** * 当年第一天 * * @param date * 日期 * @return 天 * @throws Exception * 异常 */ public static String getThisYear(String date) throws Exception { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); SimpleDateFormat format3 = new SimpleDateFormat("yyyy"); Date time = format3.parse(date); String time1 = format3.format(time); Date startTime = format.parse(time1 + "-01-01"); String dates = format.format(startTime); return dates; } /** * 当月第一天 * * @param date * 天 * @return 天 * @throws ParseException * 异常 */ public static String getFirstDayToMonth(String date) throws ParseException { // 获取截止当前天数 SimpleDateFormat format = new SimpleDateFormat("yyyy-MM"); Date nowDay = format.parse(date); String time = format.format(nowDay); String firstDay = time + "-01"; return firstDay; } /** * 当年第一天 * * @param date * 天 * @return 天 * @throws ParseException * 异常 */ public static String getFirstDay(String date) { // 获取截止当前天数 SimpleDateFormat format = new SimpleDateFormat("yyyy"); Date nowDay = null; try { nowDay = format.parse(date); } catch (ParseException e) { throw new BizException("日期转换异常"); } String time = format.format(nowDay); String firstDay = time + "-01-01"; return firstDay; } /** * 获取日期到年初的天数 * * @param date * 天 * @return 天数 * @throws Exception * 异常 */ public static int getDayCount(String date) throws Exception { // 获取截止当前天数 SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String year = date.substring(0, ConstantsConfig.CUT_OUT); String starttime = year + "-01-01 00:00:00"; String endtime = date + " 00:00:00"; Date d1 = format.parse(starttime); Date d2 = format.parse(endtime); long s1 = d1.getTime(); long s2 = d2.getTime(); int days = (int) ((s2 - s1) / ConstantsConfig.EVERYDAY_SECOND); return days; } /** * 月底到年初的天数 * * @param date * 天 * @return 天 * @throws Exception * 异常 */ public static int getYearCount(String date) throws Exception { String count = getMonthDay(date); String firstDay = getFirstDay(date); SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); SimpleDateFormat format2 = new SimpleDateFormat("yyyy-MM"); long startTime = format.parse(firstDay).getTime(); long endTime = format2.parse(date).getTime(); String string = format2.format(endTime); Date dates = format.parse(string + "-" + count); long endMonthTime = dates.getTime(); long dayMonth = (endMonthTime - startTime) / ConstantsConfig.EVERYDAY_SECOND; return (int) dayMonth; } /** * 获取给定日起前一天 * * @param date * 天 * @return 天 * @throws ParseException * 异常 */ public static String getYesterDay(String date) throws ParseException { // 获取给定日起过去15天 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar cal = Calendar.getInstance(); Date dateTemp = sdf.parse(date); cal.setTime(dateTemp); cal.add(Calendar.DATE, ConstantsConfig.MINUS_1); Date dates = cal.getTime(); String yesterDay = sdf.format(dates); return yesterDay; } /** * 获取给定日起前一周 * * @param date * 天 * @return 天 * @throws ParseException * 异常 */ public static String getLastWeekDay(String date) throws ParseException { // 获取给定日起过去15天 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar cal = Calendar.getInstance(); Date dateTemp = sdf.parse(date); cal.setTime(dateTemp); cal.add(Calendar.DATE, ConstantsConfig.MINUS_7); Date dates = cal.getTime(); String yesterDay = sdf.format(dates); return yesterDay; } /** * 获取给定日起过去15天 * * @param date * 天 * @return 天 * @throws ParseException * 异常 */ public static String getLastFifthDay(String date) throws ParseException { // 获取给定日起过去15天 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar cal = Calendar.getInstance(); Date dateTemp = sdf.parse(date); cal.setTime(dateTemp); cal.add(Calendar.DATE, ConstantsConfig.MINUS_15); // -15 Date dates = cal.getTime(); String lastFifthDay = sdf.format(dates); return lastFifthDay; } /** * 获取给定日起一个月 * * @param date * 天 * @return 天 * @throws ParseException * 异常 */ public static String getLastMonthDay(String date) throws ParseException { // 获取给定日起过去15天 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar cal = Calendar.getInstance(); Date dateTemp = sdf.parse(date); cal.setTime(dateTemp); cal.add(C