java获取本月日历表的方法

要获取本月的日历表，可以使用Java中的Calendar类来实现。下面是详细步骤：

1.获取当前月份的第一天
我们可以使用Calendar类的getActualMinimum()方法，将日历字段设置为该字段可能的最小值，例如我们将日历字段设置为月份的最小值，即Calendar.MONTH，然后使用getActualMinimum(Calendar.DATE)方法获取当前月份的第一天的日期。代码如下：

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMinimum(Calendar.DATE));
Date firstDayOfMonth = calendar.getTime();

2.获取当前月份的最后一天
类似地，我们可以使用getActualMaximum(Calendar.DATE)方法获取当前月份的最后一天，代码如下：

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DATE));
Date lastDayOfMonth = calendar.getTime();

3.获取当前月份的所有日期
要获取当前月份的所有日期，我们需要循环处理从当前月份的第一天到最后一天之间的日期。代码如下：

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMinimum(Calendar.DATE));
Date firstDayOfMonth = calendar.getTime();

calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DATE));
Date lastDayOfMonth = calendar.getTime();

calendar.setTime(firstDayOfMonth);

while (!calendar.getTime().after(lastDayOfMonth)) {
    Date currentDate = calendar.getTime();
    System.out.println(currentDate);
    calendar.add(Calendar.DATE, 1);
}

示例输出：

Tue Sep 01 00:00:00 CST 2020
Wed Sep 02 00:00:00 CST 2020
Thu Sep 03 00:00:00 CST 2020
Fri Sep 04 00:00:00 CST 2020
Sat Sep 05 00:00:00 CST 2020
Sun Sep 06 00:00:00 CST 2020
Mon Sep 07 00:00:00 CST 2020
Tue Sep 08 00:00:00 CST 2020
Wed Sep 09 00:00:00 CST 2020
Thu Sep 10 00:00:00 CST 2020
Fri Sep 11 00:00:00 CST 2020
Sat Sep 12 00:00:00 CST 2020
Sun Sep 13 00:00:00 CST 2020
Mon Sep 14 00:00:00 CST 2020
Tue Sep 15 00:00:00 CST 2020
Wed Sep 16 00:00:00 CST 2020
Thu Sep 17 00:00:00 CST 2020
Fri Sep 18 00:00:00 CST 2020
Sat Sep 19 00:00:00 CST 2020
Sun Sep 20 00:00:00 CST 2020
Mon Sep 21 00:00:00 CST 2020
Tue Sep 22 00:00:00 CST 2020
Wed Sep 23 00:00:00 CST 2020
Thu Sep 24 00:00:00 CST 2020
Fri Sep 25 00:00:00 CST 2020
Sat Sep 26 00:00:00 CST 2020
Sun Sep 27 00:00:00 CST 2020
Mon Sep 28 00:00:00 CST 2020
Tue Sep 29 00:00:00 CST 2020
Wed Sep 30 00:00:00 CST 2020