我如何发现给定日期的季度?

How do I discover the Quarter of a given Date?(我如何发现给定日期的季度?)

问题描述

给定一个 java.util.Date 对象，我该如何找到它所在的 Quarter?

Given a java.util.Date object how do I go about finding what Quarter it's in?

假设 Q1 = 1 月 2 月 3 月，Q2 = 4 月、5 月、6 月等

Assuming Q1 = Jan Feb Mar, Q2 = Apr, May, Jun, etc.

推荐答案

从 Java 8 开始，季度可作为字段访问，使用 java.time 包.

Since Java 8, the quarter is accessible as a field using classes in the java.time package.

import java.time.LocalDate;
import java.time.temporal.IsoFields;

LocalDate myLocal = LocalDate.now();
quarter = myLocal.get(IsoFields.QUARTER_OF_YEAR);

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在旧版本的 Java 中，您可以使用:

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In older versions of Java, you could use:

import java.util.Date;

Date myDate = new Date();
int quarter = (myDate.getMonth() / 3) + 1;

请注意，尽管 getMonth 很早就被弃用了:

Be warned, though that getMonth was deprecated early on:

从 JDK 1.1 版开始，由 Calendar.get(Calendar.MONTH) 取代.

As of JDK version 1.1, replaced by Calendar.get(Calendar.MONTH).

相反，您可以像这样使用 Calendar 对象:

Instead you could use a Calendar object like this:

import java.util.Calendar;
import java.util.GregorianCalendar;

Calendar myCal = new GregorianCalendar();
int quarter = (myCal.get(Calendar.MONTH) / 3) + 1;

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