JAVA中文件与Byte数组相互转换的方法

java

  JAVA中文件与Byte数组相互转换的方法,如下:

 1 public class FileUtil {

2

3 //将文件转换成Byte数组

4 public static byte[] getBytesByFile(String pathStr) {

5 File file = new File(pathStr);

6 try {

7 FileInputStream fis = new FileInputStream(file);

8 ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);

9 byte[] b = new byte[1000];

10 int n;

11 while ((n = fis.read(b)) != -1) {

12 bos.write(b, 0, n);

13 }

14 fis.close();

15 byte[] data = bos.toByteArray();

16 bos.close();

17 return data;

18 } catch (Exception e) {

19 e.printStackTrace();

20 }

21 return null;

22 }

23

24 //将Byte数组转换成文件

25 public static void getFileByBytes(byte[] bytes, String filePath, String fileName) {

26 BufferedOutputStream bos = null;

27 FileOutputStream fos = null;

28 File file = null;

29 try {

30 File dir = new File(filePath);

31 if (!dir.exists() && dir.isDirectory()) {// 判断文件目录是否存在

32 dir.mkdirs();

33 }

34 file = new File(filePath + "\\" + fileName);

35 fos = new FileOutputStream(file);

36 bos = new BufferedOutputStream(fos);

37 bos.write(bytes);

38 } catch (Exception e) {

39 e.printStackTrace();

40 } finally {

41 if (bos != null) {

42 try {

43 bos.close();

44 } catch (IOException e) {

45 e.printStackTrace();

46 }

47 }

48 if (fos != null) {

49 try {

50 fos.close();

51 } catch (IOException e) {

52 e.printStackTrace();

53 }

54 }

55 }

56 }

57 }

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