commons-io下的几个copy api

copyFile

copy file and rename filereserve the file's last modified date/times(cp -p)both src and dest should be file

FileUtils.copyFile(new File("./folderA/a.txt"),new File("./folderB"));

copyFileToDirectory

copy file to dest folderdest must be folder, if not exist, mkdirs

FileUtils.copyFileToDirectory(new File("src/main/resources/folderA/a.txt"),new File("src/main/resources/folderB/"));

copyDirectory

copy all files in one folder to another foldersrc must be folder, or throw exceptionfor dest folder, mkdirs

FileUtils.copyDirectory(new File("src/main/resources/folderA/"),new File("src/main/resources/folderB/c.txt"));

copyDirectoryToDirectory

copy to dest folder as a subfolder

FileUtils.copyDirectoryToDirectory(new File("src/main/resources/folderA/"),new File("src/main/resources/folderB/"));