| | |
| | | package com.ycl.utils; |
| | | |
| | | import org.apache.commons.lang3.time.DateFormatUtils; |
| | | import org.glassfish.jaxb.core.v2.TODO; |
| | | |
| | | import javax.annotation.Nullable; |
| | | import java.lang.management.ManagementFactory; |
| | |
| | | } |
| | | |
| | | /** |
| | | * 获取某月开始日期 |
| | | */ |
| | | public static String getMouthStart(@Nullable Date date) { |
| | | SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); |
| | | Calendar c = Calendar.getInstance(); |
| | | if (date != null) { |
| | | c.setTime(date); // 如果date不为null,则设置Calendar的日期为date |
| | | } |
| | | c.set(Calendar.DAY_OF_MONTH,1); |
| | | return df.format(c.getTime()); |
| | | } |
| | | |
| | | /** |
| | | * 获取某月结束日期 |
| | | */ |
| | | public static String getMouthEnd(@Nullable Date date) { |
| | | SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); |
| | | Calendar c = Calendar.getInstance(); |
| | | if (date != null) { |
| | | c.setTime(date); // 如果date不为null,则设置Calendar的日期为date |
| | | } |
| | | c.set(Calendar.DAY_OF_MONTH, c.getActualMaximum(Calendar.DAY_OF_MONTH)); |
| | | return df.format(c.getTime()); |
| | | } |
| | | /** |
| | | * 获取指定Calendar的季度开始日期 |
| | | * @param calendar 日历 |
| | | * @return 季度第一天 |
| | |
| | | } |
| | | |
| | | |
| | | public static Date getDay(int year,int month,int day) { |
| | | // 获取Calendar实例,默认使用当前时区和语言环境 |
| | | Calendar calendar = Calendar.getInstance(); |
| | | // 清除Calendar中的所有字段值,以避免它们对当前日期时间有影响 |
| | | calendar.clear(); |
| | | // 设置年份、月份(注意:月份是从0开始的,所以8月是7)、日期 |
| | | calendar.set(Calendar.YEAR, year); |
| | | calendar.set(Calendar.MONTH, month); |
| | | calendar.set(Calendar.DAY_OF_MONTH, day); |
| | | // Calendar.getTime()方法返回一个表示此Calendar时间值的Date对象 |
| | | Date date = calendar.getTime(); |
| | | return date; |
| | | } |
| | | public static Integer getDayOfMonth(Date date) { |
| | | // 创建一个Calendar对象并设置为当前日期和时间 |
| | | Calendar calendar = Calendar.getInstance(); |
| | | calendar.setTime(date); |
| | | // 获取当前日期是当月中的第几天 |
| | | return calendar.get(Calendar.DAY_OF_MONTH); |
| | | } |
| | | } |