Java 拷贝文件内容

说明：

把d盘下a.txt 中的内容复制到e盘下e.txt文件中

private static void copyDataBase() {try {File f1 = new File("d:/a.txt");File f2 = new File("e:/e.txt");InputStream in = new FileInputStream(f1);OutputStream out = new FileOutputStream(f2);byte[] buf = new byte[1024];int len;while ((len = in.read(buf)) > 0) {out.write(buf, 0, len);}in.close();out.close();System.out.println("File copied.");} catch (FileNotFoundException ex) {System.out.println(ex.getMessage() + " in the specified directory.");System.exit(0);} catch (IOException e) {System.out.println(e.getMessage());}}