Java - 获取目录中的最新文件? [英] Java - get the newest file in a directory?

问题描述

是否有人拥有可以返回目录中最新文件的 Java 代码片段(或了解简化此类事情的库)?

Does anybody have a snippet of Java that can return the newest file in a directory (or knowledge of a library that simplifies this sort of thing)?

推荐答案

以下代码返回最后修改的文件或文件夹:

The following code returns the last modified file or folder:

public static File getLastModified(String directoryFilePath)
{
    File directory = new File(directoryFilePath);
    File[] files = directory.listFiles(File::isFile);
    long lastModifiedTime = Long.MIN_VALUE;
    File chosenFile = null;

    if (files != null)
    {
        for (File file : files)
        {
            if (file.lastModified() > lastModifiedTime)
            {
                chosenFile = file;
                lastModifiedTime = file.lastModified();
            }
        }
    }

    return chosenFile;
}

请注意，由于 lambda 表达式，它需要 Java 8 或更高版本.

Note that it required Java 8 or newer due to the lambda expression.

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