<dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.6</version> </dependency>
其中主要的工具类有:
FileUtils:
Facilities are provided in the following areas: writing to a file reading from a file make a directory including parent directories copying files and directories deleting files and directories converting to and from a URL listing files and directories by filter and extension comparing file content file last changed date calculating a checksum
使用代码:
File file = new File("F:/info.txt"); FileUtils.copyToDirectory(file, new File("E:/")); FileUtils.deleteQuietly(new File("E:/info.txt")); List lines = FileUtils.readLines(file, "UTF-8"); //... Collection<File> listFiles = FileUtils.listFiles(new File("F:/"), null, true); //... Collection<File> listFilesAndDirs = FileUtils.listFilesAndDirs(new File("F:/"), new IOFileFilter() { @Override public boolean accept(File dir, String name) { return true; } @Override public boolean accept(File file) { return true; } }, TrueFileFilter.INSTANCE); //... long sizeOf = FileUtils.sizeOf(new File("F:/info.txt")); //...
FileAlterationMonitor:
用于监听文件系统上文件的变动,使用代码:
FileAlterationObserver observer = new FileAlterationObserver(new File("F:/")); observer.addListener(this); FileAlterationMonitor monitor = new FileAlterationMonitor(1000); monitor.addObserver(observer); monitor.start();