How to get the last modified date of a file in java? (code example)
如何在java中获取文件的最后修改日期?我们可以使用File类的lastModified()方法来获取。下面本篇文章就来带大家了解一下lastModified()方法的使用,希望对大家有所帮助。
File类的lastModified()方法
lastModified()方法可以用于返回文件最后一次被修改的时间。
基本语法:
public long lastModified()
返回值:lastModified()方法返回由这个抽象路径名表示的文件上次被修改的时间;返回值以毫秒为单位,因此为了使其可读,我们可以使用simpledateformat格式化输出。
如何获取文件的最后修改日期?
下面通过代码示例来看看如何使用lastModified()方法获取件的最后修改日期。
示例:
import java.io.File; import java.text.SimpleDateFormat; public class LastModifiedDateExample { public static void main(String[] args) { //Specify the file path and name File file = new File("D:\\Myfile.txt"); SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss"); System.out.println("最后修改日期为:" + sdf.format(file.lastModified())); } }
输出:
最后修改日期为:03/18/2019 10:41:49
我们可以以任何所需的格式格式化和显示输出。例如,如果我们使用以下模式:
SimpleDateFormat sdf2 = new SimpleDateFormat("MM-dd-yy HH:mm a"); System.out.println("Last Modified Date: " + sdf2.format(file.lastModified()));
我们将获得以上输出以上模式:
最后修改日期为:03-18-19 10:41 AM
相关视频教程推荐:《Java教程》
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