Object, byte [], bytebuffer conversion.

New Version

Package CN. vicky. chapt13; import Java. io. bytearrayinputstream; import Java. io. bytearrayoutputstream; import Java. io. ioexception; import Java. io. inputstream; import Java. io. objectinputstream; import Java. io. objectoutputstream; import Java. io. serializable; import Java. NIO. bytebuffer; import Java. NIO. charset. charset;/*** Object serialization and deserialization (serialization object to byte [], bytebuffer, byte [] convert object ** @ author Vicky * @ email eclipser@163.com */public class byteutil {public static byte [] getbytes (serializable OBJ) throws ioexception {bytearrayoutputstream bout = new bytearrayoutputstream (); objectoutputstream out = new objectoutputstream (bout); out. writeobject (OBJ); out. flush (); byte [] bytes = bout. tobytearray (); bout. close (); out. close (); Return bytes;} public static int sizeof (serializable OBJ) throws ioexception {return getbytes (OBJ ). length;} public static object GetObject (byte [] bytes) throws ioexception, classnotfoundexception {bytearrayinputstream Bi = new bytearrayinputstream (bytes); objectinputstream OI = new objectinputstream (BI ); object OBJ = Oi. readobject (); bi. close (); Oi. close (); Return OBJ;} public static object GetObject (bytebuffer) throws classnotfoundexception, ioexception {inputstream input = new bytearrayinputstream (bytebuffer. array (); objectinputstream OI = new objectinputstream (input); object OBJ = Oi. readobject (); input. close (); Oi. close (); bytebuffer. clear (); Return OBJ;} public static bytebuffer getbytebuffer (serializable OBJ) throws ioexception {byte [] bytes = byteutil. getbytes (OBJ); bytebuffer buff = bytebuffer. wrap (bytes); Return Buff;} public static void main (string [] ARGs) throws ioexception, classnotfoundexception {system. out. println (byteutil. sizeof (New player1 (); system. out. println (byteutil. sizeof (New player2 (); system. out. println (byteutil. sizeof (New player3 (); system. out. println (byteutil. sizeof (New player4 (); system. out. println (byteutil. sizeof (New player5 (); system. out. println ("---------"); player5 P5 = new player5 (); system. out. println (byteutil. sizeof (P5); p5.id1 = 100000; p5.id2 = 200000; system. out. println (byteutil. sizeof (P5); p5.name = "ooxx"; system. out. println (byteutil. sizeof (P5); p5.name = "ooxxooxx"; system. out. println (byteutil. sizeof (P5); system. out. println ("---------"); byte [] bytes = byteutil. getbytes (P5); player5 p5_2 = (player5) byteutil. getObject (bytes); system. out. println (p5_2.id1); system. out. println (p5_2.id2); system. out. println (p5_2.name); system. out. println ("---------"); system. out. println (byteutil. sizeof (New player6 (); player6 P6 = new player6 (); system. out. println (byteutil. sizeof (P6); p6.id1 = 100000; p6.id2 = 200000; system. out. println (byteutil. sizeof (P6); p6.setname ("Vicky"); system. out. println (byteutil. sizeof (P6); p6.setname ("Chinese name"); system. out. println (byteutil. sizeof (P6); bytes = byteutil. getbytes (P6); player6 p6_2 = (player6) byteutil. getObject (bytes); system. out. println (p6_2.id1); system. out. println (p6_2.id2); system. out. println (p6_2.getname () ;}} class player1 implements serializable {int id1;} class player2 extends player1 {int Id2;} class player3 implements serializable {int id1; int Id2 ;} class player4 extends player3 {string name;} class player5 implements serializable {int id1; int Id2; string name;} class player6 implements serializable {final static charset chrarset = charset. forname ("UTF-8"); int id1; int Id2; private byte [] Name = new byte [20]; Public String getname () {return new string (name, chrarset);} public void setname (string name) {This. name = Name. getbytes (chrarset);} // public void setname (string name) {// byte [] tmpbytes = Name. getbytes (chrarset); // For (INT I = 0; I <tmpbytes. length; I ++) {// This. name [I] = tmpbytes [I]; //}

 

 

 

 

Old Version

Package CN. vicky. utils; </P> <p> Import Java. io. bytearrayinputstream; <br/> Import Java. io. bytearrayoutputstream; <br/> Import Java. io. ioexception; <br/> Import Java. io. inputstream; <br/> Import Java. io. objectinputstream; <br/> Import Java. io. objectoutputstream; <br/> Import Java. NIO. bytebuffer; </P> <p> Import Org. apache. mina. core. buffer. iobuffer; </P> <p>/** <br/> * Object serialization and deserialization (serialization object to byte [], bytebuffer, byte [] convert object <br/> * @ author Vicky <br/> * @ email eclipser@163.com <br/> */<br/> public class byteutil {</P> <p> Public static byte [] getbytes (Object OBJ) throws ioexception {<br/> bytearrayoutputstream bout = new bytearrayoutputstream (); <br/> objectoutputstream out = new objectoutputstream (bout); <br/> out. writeobject (OBJ); <br/> out. flush (); <br/> byte [] bytes = bout. tobytearray (); <br/> bout. close (); <br/> out. close (); <br/> return bytes; <br/>}</P> <p> Public static object GetObject (byte [] bytes) throws ioexception, classnotfoundexception {<br/> bytearrayinputstream Bi = new bytearrayinputstream (bytes); <br/> objectinputstream OI = new objectinputstream (BI); <br/> Object OBJ = Oi. readobject (); <br/> bi. close (); <br/> Oi. close (); <br/> return OBJ; <br/>}</P> <p> Public static object GetObject (bytebuffer) throws classnotfoundexception, ioexception {<br/> // iobuffer that requires the Mina framework <br/> iobuffer buffer = iobuffer. allocate (bytebuffer. capacity ()). setautoexpand (true); // automatically expand <br/> for (INT I = 0; I <bytebuffer. capacity (); I ++) {<br/> bytebuffer. position (I); <br/> buffer. put (bytebuffer. get (); <br/>}< br/> buffer. position (0); <br/> inputstream input = buffer. asinputstream (); <br/> objectinputstream OI = new objectinputstream (input); <br/> Object OBJ = Oi. readobject (); <br/> input. close (); <br/> Oi. close (); <br/> return OBJ; <br/>}</P> <p> Public static bytebuffer getbytebuffer (Object OBJ) throws ioexception {<br/> byte [] bytes = byteutil. getbytes (OBJ); <br/> bytebuffer buff = bytebuffer. wrap (bytes); <br/> return Buff; <br/>}</P> <p >}< br/>

 

The preceding Code implements conversion between Java and data transmission and conversion between Java and ActionScript. The main idea is not discussed above...