Java - 获取目录中的最新文件？

有没有人有一个Java片段可以返回目录中的最新文件(或者是一个简化这种事情的库的知识)？

这将返回上次修改时间:

public static File lastFileModified(String dir) {
    File fl = new File(dir);
    File[] files = fl.listFiles(new FileFilter() {          
        public boolean accept(File file) {
            return file.isFile();
        }
    });
    long lastMod = Long.MIN_VALUE;
    File choice = null;
    for (File file : files) {
        if (file.lastModified() > lastMod) {
            choice = file;
            lastMod = file.lastModified();
        }
    }
    return choice;
}

在Java 8中:

Path dir = Paths.get("./path/somewhere");  // specify your directory

Optional lastFilePath = Files.list(dir)    // here we get the stream with full directory listing
    .filter(f -> !Files.isDirectory(f))  // exclude subdirectories from listing
    .max(Comparator.comparingLong(f -> f.toFile().lastModified()));  // finally get the last file using simple comparator by lastModified field

if ( lastFilePath.isPresent() ) // your folder may be empty
{
    // do your code here, lastFilePath contains all you need
}     

这对我来说非常好:

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.comparator.LastModifiedFileComparator;
import org.apache.commons.io.filefilter.WildcardFileFilter;

...

/* Get the newest file for a specific extension */
public File getTheNewestFile(String filePath, String ext) {
    File theNewestFile = null;
    File dir = new File(filePath);
    FileFilter fileFilter = new WildcardFileFilter("*." + ext);
    File[] files = dir.listFiles(fileFilter);

    if (files.length > 0) {
        /** The newest file comes first **/
        Arrays.sort(files, LastModifiedFileComparator.LASTMODIFIED_REVERSE);
        theNewestFile = files[0];
    }

    return theNewestFile;
}