设置一个月的开始和结束
1.以前的办法
/** * 根据月份设置活动的开始何结束时间 * * @param activity * @param activityMonthPara * 客户端选择的月份 * @return */public Advertisement setActivtityDate(Advertisement activity,String activityMonthPara) {int year;String month = null;String day = "01";Calendar today = Calendar.getInstance();today.setTime(new Date());year = getActivityYear(today, activityMonthPara);// today.add(Calendar.MONTH, 1);// today.add(Calendar.SECOND, -1);if (activityMonthPara.equals("12")) {// 活动开始时间month = activityMonthPara;String startDateStr = year + "/" + month + "/" + day;activity.setStartDate(DateUtil.getInstance().parseStringToDate(startDateStr));// 活动结束时间year += 1;month = "01";String endDateStr = year + "/" + month + "/" + day;activity.setEndDate(DateUtil.getInstance().parseStringToDate(endDateStr));} else {int intMonth = Integer.parseInt(activityMonthPara);if (intMonth < 9) {// 其它月份活动开始时间month = activityMonthPara;String startDateStr = year + "/0" + month + "/" + day;activity.setStartDate(DateUtil.getInstance().parseStringToDate(startDateStr));// 其它月份活动结束时间,结束月份要加1month = String.valueOf(Integer.parseInt(activityMonthPara) + 1);String endDateStr = year + "/0" + month + "/" + day;activity.setEndDate(DateUtil.getInstance().parseStringToDate(endDateStr));} else if (intMonth == 9) {// 其它月份活动开始时间month = activityMonthPara;String startDateStr = year + "/0" + month + "/" + day;activity.setStartDate(DateUtil.getInstance().parseStringToDate(startDateStr));// 其它月份活动结束时间,结束月份要加1month = String.valueOf(Integer.parseInt(activityMonthPara) + 1);String endDateStr = year + "/" + month + "/" + day;activity.setEndDate(DateUtil.getInstance().parseStringToDate(endDateStr));} else {// 其它月份活动开始时间month = activityMonthPara;String startDateStr = year + "/" + month + "/" + day;activity.setStartDate(DateUtil.getInstance().parseStringToDate(startDateStr));// 其它月份活动结束时间,结束月份要加1month = String.valueOf(Integer.parseInt(activityMonthPara) + 1);String endDateStr = year + "/" + month + "/" + day;activity.setEndDate(DateUtil.getInstance().parseStringToDate(endDateStr));}}return activity;}/** * 根据月份设置活动的开始何结束时间 * * @param activity * @param activityMonthPara * 客户端选择的月份 * @return */public Advertisement setActivtityDate(Advertisement activity,String activityMonthPara) {Date startDate = DateUtil.getInstance().parseStringToDate(activityMonthPara, "yyyy-MM");activity.setStartDate(startDate);Calendar today = Calendar.getInstance();today.setTime(startDate);today.add(Calendar.MONTH, 1);today.add(Calendar.SECOND, -1);activity.setEndDate(today.getTime());System.out.println("endDate:" + today.getTime());return activity;}/** * 功能：将dateString字符串转换成dateModul型的日期格式 * * @param dateString * @param dateModul * @return */public Date parseStringToDate(String dateString, String dateModul) {SimpleDateFormat dateFormat = new SimpleDateFormat(dateModul);Date tempDate = null;try {tempDate = dateFormat.parse(dateString);} catch (ParseException e) {System.out.println("日期格式转化错误");e.printStackTrace();}return tempDate;}