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();   
                }   
            }   
        }   
    }   
}