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标题: Java 文件和byte数组转换 [打印本页]

作者: jekeyhui99 时间: 2015-11-24 22:14
标题: Java 文件和byte数组转换
/**
   * 获得指定文件的byte数组
   */
private 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();
            }
         }
      }
}

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