public static void main(String[] args)
    {
        // 源File物件
        File source = new File("ajava.txt");
       
        // 備份的File物件
        File target = new File("ajava-backup.txt");
       
        //通過JVM讀取java.io.tmpdir屬性取得臨時資料夾
        File targetDir = new File(System.getProperty("java.io.tmpdir"));
       
        try
        {
            //在同一個資料夾複製檔案
            System.out.println("複製 " + source + " 檔案到 " + target);
            FileUtils.copyFile(source, target);
           
            // 根據指定的資料夾複製
            System.out.println("複製 " + source + " 檔案到" + targetDir + "目錄");
            FileUtils.copyFileToDirectory(source, targetDir);
        } catch (IOException e)
        {
            // Errors will be reported here if any error occures during copying
            // the file
            e.printStackTrace();
        }
    }