Object,byte[],ByteBuffer之间的转换。

新版本

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;

/**
* 对象序列化，反序列化（序列化对象转byte[],ByteBuffer, byte[]转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 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("中文名称");
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];
//    }
// }
}

老版本

package cn.vicky.utils;

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.nio.ByteBuffer;

import org.apache.mina.core.buffer.IoBuffer;

/**
* 对象序列化，反序列化（序列化对象转byte[],ByteBuffer, byte[]转object
*
* @author Vicky
* @email eclipser@163.com
*/
public class ByteUtil {

public static byte[] getBytes(Object 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 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 byteBuffer) throws ClassNotFoundException, IOException {
// 需要mina框架的IoBuffer
IoBuffer buffer = IoBuffer.allocate(byteBuffer.capacity()).setAutoExpand(true); // 自动展开
for (int i = 0; i < byteBuffer.capacity(); i++) {
byteBuffer.position(i);
buffer.put(byteBuffer.get());
}
buffer.position(0);
InputStream input = buffer.asInputStream();
ObjectInputStream oi = new ObjectInputStream(input);
Object obj = oi.readObject();
input.close();
oi.close();
return obj;
}

public static ByteBuffer getByteBuffer(Object obj) throws IOException {
byte[] bytes = ByteUtil.getBytes(obj);
ByteBuffer buff = ByteBuffer.wrap(bytes);
return buff;
}

}

以上实现了Java之间的转换，关于Java与ActionScript之间的数据传输与转换。主要思想同上暂时不予讨论。。。