/** * 字符流字节流 */ public class StreamTest1 { @Test //字节流操作 public void test1() { try { String str1 = "D:\pic\a.txt"; String str2 = "D:\pic\b.txt"; FileInputStream fis = new FileInputStream(str1); FileOutputStream fos = new FileOutputStream(str2); byte[] b = new byte[1024]; while (fis.read(b) != -1) { fos.write(b); } // 关闭流 先开后关 后开先关 fos.close(); // 后开先关 fis.close(); // 先开后关 } catch (Exception e) { e.printStackTrace(); } } @Test //使用字符流操作 public void test2() { String str1 = "D:\pic\a.txt"; String str2 = "D:\pic\b.txt"; try { BufferedReader reader = new BufferedReader(new FileReader(str1)); BufferedWriter writer = new BufferedWriter(new FileWriter(str2)); String str; while ((str = reader.readLine()) != null) { writer.write(str); } writer.close(); reader.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }