实例代码 ： http://download.csdn.net/detail/jiangtao_st/7677503

1.  用户对象
   
   

   /**
    *
    * <p>
    *用户实体对象定义
    * </p>
    *
    * @author 卓轩
    * @创建时间：2014年6月20日
    * @产品: UIC
    * @version： V1.0
    */
   public class UserDO implements Serializable {
   
   	private static final long serialVersionUID = 7289036533757178921L;
   
   	/**
   	 * userid
   	*/
   	private int userId;
   
   	/**
   	 * email
   	*/
   	private String email;
   
   	/**
   	 * uname
   	*/
   	private String uname;
   
   	/**
   	 * unick
   	*/
   	private String unick;
   
   	/**
   	 * sex
   	*/
   	private Integer sex;
   
   	public int getUserId() {
   		return userId;
   	}
   
   	public void setUserId(int userId) {
   		this.userId = userId;
   	}
   
   	public String getEmail() {
   		return email;
   	}
   
   	public void setEmail(String email) {
   		this.email = email;
   	}
   
   	public String getUname() {
   		return uname;
   	}
   
   	public void setUname(String uname) {
   		this.uname = uname;
   	}
   
   	public String getUnick() {
   		return unick;
   	}
   
   	public void setUnick(String unick) {
   		this.unick = unick;
   	}
   
   	public Integer getSex() {
   		return sex;
   	}
   
   
   	public void setSex(Integer sex) {
   		this.sex = sex;
   	}
   
   	@Override
   	public String toString() {
   		return "UserDO ["+this.userId+"],["+this.uname+"],["+this.unick+"],["+this.email+"]";
   	}
   
   	public byte [] coder(){
   
   		ByteBuffer buffer = ByteBuffer.allocate(1024);
   		
   		byte [] email = this.email.getBytes();
   		buffer.putInt(email.length);
   		buffer.put(email);
   		
   		byte [] uname =this.uname.getBytes();
   		buffer.putInt(uname.length);
   		buffer.put(uname);
   		
   		byte [] unick = this.unick.getBytes();
   		buffer.putInt(unick.length);
   		buffer.put(unick);
   		
   		buffer.putInt(this.sex);
   		buffer.putInt(this.userId);
   		
   		buffer.flip();
   		byte[] result = new byte[buffer.remaining()];
   		buffer.get(result);
   		return result;
   	}
   
   }

   
   
2.  对比方案
   
   

   /**
    * 
    * <p>
    * 	对比对象编解码 优劣
    * 
    *  代码通过从同一个对象，使用jdk序列化 和 二进制编解码 ，从执行时间，产生的字节大小作对比
    * </p>
    * 
    * @author 卓轩
    * @创建时间：2014年7月8日
    * @version： V1.0
    */
   public class ObjectCoderCompare {
   
   	/**
   	 * 对比序列化文件大小
   	 */
   	@Test
   	public void sizeByteCompare(){
   		
   		try {
   			UserDO zhuoxuan = new UserDO();
   			zhuoxuan.setUserId(113445);
   			zhuoxuan.setSex(1);
   			zhuoxuan.setUname("卓轩");
   			zhuoxuan.setUnick("zhuoxuan");
   			zhuoxuan.setEmail("zhuoxuan@mogujie.com");
   			
   			System.out.println("byte array 序列化大小:" + zhuoxuan.coder().length);
   			
   			//jdk 序列化对象
   			ByteArrayOutputStream bos = new ByteArrayOutputStream();
   			ObjectOutputStream objectOutputStream = new ObjectOutputStream(bos);
   			objectOutputStream.writeObject(zhuoxuan);
   			objectOutputStream.flush();
   			objectOutputStream.close();
   			byte[] byteArray = bos.toByteArray();
   			System.out.println("jdk序列化对象大小：" + byteArray.length);
   		} catch (IOException e) {
   			// TODO Auto-generated catch block
   			e.printStackTrace();
   		}
   	}
   	
   	/**
   	 * 执行时间，性能对比
   	 */
   	@Test
   	public void performCompare(){
   		
   		try {
   			UserDO zhuoxuan = new UserDO();
   			zhuoxuan.setUserId(113445);
   			zhuoxuan.setSex(1);
   			zhuoxuan.setUname("卓轩");
   			zhuoxuan.setUnick("zhuoxuan");
   			zhuoxuan.setEmail("zhuoxuan@mogujie.com");
   			
   			long startTime = System.currentTimeMillis();
   			int count = 1000000;
   			for (int i = 0; i < count; i++) {
   				zhuoxuan.coder();
   			}
   			long endTime = System.currentTimeMillis();
   			System.out.println("byte array 执行时间：" + (endTime-startTime) + "ms");
   			
   			startTime = System.currentTimeMillis();
   			for (int i = 0; i < count; i++) {
   				//jdk 序列化对象
   				ByteArrayOutputStream bos = new ByteArrayOutputStream();
   				ObjectOutputStream objectOutputStream = new ObjectOutputStream(bos);
   				objectOutputStream.writeObject(zhuoxuan);
   				objectOutputStream.flush();
   				objectOutputStream.close();
   				byte[] byteArray = bos.toByteArray();
   			}
   			endTime = System.currentTimeMillis();
   			System.out.println("jdk 序列化对象 执行时间：" + (endTime-startTime) + "ms");
   		} catch (IOException e) {
   			// TODO Auto-generated catch block
   			e.printStackTrace();
   		}
   		
   	}
   }

   
   
   
3. 运行结果
   
   

   byte array 序列化大小:54

   jdk序列化对象大小：267