背景

需要计算两个日期直接的天数，这里使用Joda Time这个第三方库解决这个问题，因为不太想操心闰年之类的复杂情况。

解决

Maven

<dependency>
  <groupId>joda-time</groupId>
  <artifactId>joda-time</artifactId>
  <version>2.10.10</version>
</dependency>

Gradle

compile group: 'joda-time', name:'joda-time', version:'2.10.10'

Java

import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.Days;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Main {
  public static void main(String[] args) {
    DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    try {
      Date startDate = dateFormat.parse("2021-10-01 00:00:00");
      Date expireDate = dateFormat.parse("2021-10-06 23:59:59");
      // 计算天数
      String timeZone = "Asia/Shanghai";
      DateTimeZone CHINA = DateTimeZone.forID(timeZone);
      DateTime start = new DateTime(startDate, CHINA);
      DateTime end = new DateTime(expireDate.getTime(), CHINA);
      Days dias = Days.daysBetween(start, end);
      System.out.printf("间隔天数：%d", dias.getDays());
    } catch (ParseException e) {
      e.printStackTrace();
    }
  }
}

结果：

间隔天数：5

参考：

• Joda-Time
• Number of days between two dates in Joda-Time

标签：joda,10,java,天数,DateTime,time,import
来源： https://blog.csdn.net/fxtxz2/article/details/114999866