object file byte转换

public static byte[] getBytesFromFile(File f){ITPUB个人空间8D%M:Cs~!lL
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         if (f == null){
4en[(K0Z#K0             return null;
+H.H_F&I0         }
`b1S-b%W0         try{
%Q6HC8ag!u-t/t0             FileInputStream stream = new FileInputStream(f);ITPUB个人空间[Mj'nK1Ke(}
             ByteArrayOutputStream ut = new ByteArrayOutputStream(1000);ITPUB个人空间)Kr6`r&IcJ
             byte[] b = new byte[1000];ITPUB个人空间d1lLU*L&z%P
             int n;
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s0             while ((n = stream.read(b)) != -1)ITPUB个人空间&qci.r
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                 out.write(b, 0, n);ITPUB个人空间C'D_Y%c7`
             stream.close();ITPUB个人空间N!\!k*@7x;|
             out.close();
;G%F%V7{:o2vdM0             return out.toByteArray();ITPUB个人空间FY.z4\(JHzU]7r
         } catch (IOException e) {ITPUB个人空间rGf"\]E
         }
Y_EHe0         return null;ITPUB个人空间F-D'bm`GZn(x
     }

    
D$uq+}?$hu0     public static File getFileFromBytes(byte[] b, String outputFile){ITPUB个人空间s't,Y%V+Ehn
         BufferedOutputStream stream = null;
2kv ^+i!_MmvZ0         File file = null;ITPUB个人空间zCe}1Wp!aNq
         try{
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Jd$ch0             file = new File(outputFile);
yM*ZU.X,e;E0             FileOutputStream fstream = new FileOutputStream(file);ITPUB个人空间&X$[| H+@[k'aQN
             stream = new BufferedOutputStream(fstream);ITPUB个人空间$iP.uJ4Q
             stream.write(b);
Z{$cc(F8ttT0         } catch (Exception e){
NkV?6X v)Q4_0             e.printStackTrace();
1GZSs5tJ.R9\0         } finally{ITPUB个人空间)?.qVX {'H dvT
             if (stream != null){
)Ew1vI Z3x)W0                 try{ITPUB个人空间ccL o/b,U-E8xV0a]
                     stream.close();
*^:I&M;e7S f7^Wz5{0                 } catch (IOException e1){ITPUB个人空间1^Mddb
                     e1.printStackTrace();ITPUB个人空间0m*T7~t_OTL4Q
                 }ITPUB个人空间
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             }ITPUB个人空间&p5c9t7Fa.XHf3M
         }ITPUB个人空间-}D(nvVG
         return file;
8ul:FFN N7iC9G|j0         }

     /** *//**ITPUB个人空间3^
E^kK,_
      * 从字节数组获取对象ITPUB个人空间4h7G']$]8OE
          */
(|OJM1x|0     public static Object getObjectFromBytes(byte[] objBytes) throws Exception{
%I+T+Bu5j?D0         if (objBytes == null || objBytes.length == 0){
TWD XFN0             return null;ITPUB个人空间5W0l$JI7[
         }
P1Pem1L0         ByteArrayInputStream bi = new ByteArrayInputStream(objBytes);ITPUB个人空间%K_I*V\ A(Iw w.x6c
         ObjectInputStream i = new ObjectInputStream(bi);ITPUB个人空间\9Q0GUpp:^%QFl
         return oi.readObject();ITPUB个人空间
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     }

     /** *//**
$|dr4U9M"T0      * 从对象获取一个字节数组

      */
cuZ,p)f0     public static byte[] getBytesFromObject(Serializable obj) throws Exception {ITPUB个人空间&q)_]9sE#O[V
         if (obj == null){ITPUB个人空间2],dg y/\)f/l0?
             return null;ITPUB个人空间#` {:E'A8W ZD:{:a#gTU
         }ITPUB个人空间1`(cH
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         ByteArrayOutputStream bo = new ByteArrayOutputStream();ITPUB个人空间&z$W?)xrMnl
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         ObjectOutputStream o = new ObjectOutputStream(bo);ITPUB个人空间d[$[F_Ugy/F
         oo.writeObject(obj);ITPUB个人空间W-HU0@;U-J
         return bo.toByteArray();
cd6R&C4B#o$wU0     }