Java 文件和byte数组转换

public class T3 {

 

public static void main(String[] args){

String filePath = "E:\\softoon\\workspace_softoon\\TestMobile\\src\\1.docx";

String outFilePath = "E:\\softoon\\workspace_softoon\\TestMobile\\src";

String outFileName = "2.docx";

 

getFile(getBytes(filePath),outFilePath,outFileName);

}

 

/**

* 获得指定文件的byte数组

*/

public static byte[] getBytes(String filePath){

byte[] buffer = null;

try {

File file = new File(filePath);

FileInputStream fis = new FileInputStream(file);

ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);

byte[] b = new byte[1000];

int n;

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

bos.write(b, 0, n);

}

fis.close();

bos.close();

buffer = bos.toByteArray();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return buffer;

}

 

/**

* 根据byte数组，生成文件

*/

public static void getFile(byte[] bfile, String filePath,String fileName) {

BufferedOutputStream bos = null;

FileOutputStream fos = null;

File file = null;

try {

File dir = new File(filePath);

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

dir.mkdirs();

}

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

fos = new FileOutputStream(file);

bos = new BufferedOutputStream(fos);

bos.write(bfile);

} catch (Exception e) {

e.printStackTrace();

} finally {

if (bos != null) {

try {

bos.close();

} catch (IOException e1) {

e1.printStackTrace();

}

}

if (fos != null) {

try {

fos.close();

} catch (IOException e1) {

e1.printStackTrace();

}

}

}

}

}