ITPub博客

首页 > Linux操作系统 > Linux操作系统 > object file byte转换

object file byte转换

原创 Linux操作系统 作者:seablue_xj 时间:2008-05-10 19:14:10 0 删除 编辑
public static byte[] getBytesFromFile(File f){
         if (f == null){
             return null;
         }
         try{
             FileInputStream stream = new FileInputStream(f);
             ByteArrayOutputStream ut = new ByteArrayOutputStream(1000);
             byte[] b = new byte[1000];
             int n;
             while ((n = stream.read(b)) != -1)
                 out.write(b, 0, n);
             stream.close();
             out.close();
             return out.toByteArray();
         } catch (IOException e) {
         }
         return null;
     }

    
     public static File getFileFromBytes(byte[] b, String outputFile){
         BufferedOutputStream stream = null;
         File file = null;
         try{
             file = new File(outputFile);
             FileOutputStream fstream = new FileOutputStream(file);
             stream = new BufferedOutputStream(fstream);
             stream.write(b);
         } catch (Exception e){
             e.printStackTrace();
         } finally{
             if (stream != null){
                 try{
                     stream.close();
                 } catch (IOException e1){
                     e1.printStackTrace();
                 }
             }
         }
         return file;
         }

     /** *//**
      * 从字节数组获取对象
          */
     public static Object getObjectFromBytes(byte[] objBytes) throws Exception{
         if (objBytes == null || objBytes.length == 0){
             return null;
         }
         ByteArrayInputStream bi = new ByteArrayInputStream(objBytes);
         ObjectInputStream i = new ObjectInputStream(bi);
         return oi.readObject();
     }

     /** *//**
      * 从对象获取一个字节数组

      */
     public static byte[] getBytesFromObject(Serializable obj) throws Exception {
         if (obj == null){
             return null;
         }
         ByteArrayOutputStream bo = new ByteArrayOutputStream();
         ObjectOutputStream o = new ObjectOutputStream(bo);
         oo.writeObject(obj);
         return bo.toByteArray();
     }

来自 “ ITPUB博客 ” ,链接:http://blog.itpub.net/7528999/viewspace-264916/,如需转载,请注明出处,否则将追究法律责任。

上一篇: spring 2.5 aop 1
请登录后发表评论 登录
全部评论

注册时间:2007-12-21

  • 博文量
    10
  • 访问量
    9927