获取当前月第一天:
/**
* 获取当前月第一天
* @param month
* @return
*/
public static String getFirstDayOfMonth(int month) {
Calendar calendar = Calendar.getInstance();
// 设置月份
calendar.set(Calendar.MONTH, month - 1);
// 获取某月最小天数
int firstDay = calendar.getActualMinimum(Calendar.DAY_OF_MONTH);
// 设置日历中月份的最小天数
calendar.set(Calendar.DAY_OF_MONTH, firstDay);
// 格式化日期
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String firstDay = sdf.format(calendar.getTime())+" 00:00:00";
return firstDay;
}
获取当前月最后一天:
public static String getLastDayOfMonth(int month) {
Calendar calendar = Calendar.getInstance();
// 设置月份
calendar.set(Calendar.MONTH, month - 1);
// 获取某月最大天数
int lastDay=0;
//2月的平年瑞年天数
if(month==2) {
lastDay = calendar.getLeastMaximum(Calendar.DAY_OF_MONTH);
}else {
lastDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
}
// 设置日历中月份的最大天数
calendar.set(Calendar.DAY_OF_MONTH, lastDay);
// 格式化日期
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String lastDay = sdf.format(calendar.getTime())+" 23:59:59";
return lastDay;
}
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