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import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
/**
* 问题来源：在看arrayList源码时候发现其中变量elementData是被transient修饰的
* 而且arrayList是实现了Serializable接口的，elementData是存储arrayList中值的
* 那么arrayList是如何实现序列化与反序列化的呢？
* 问题解决：首先我们知道序列化与反序列化是使用ObjectInputStream、ObjectOutputStream中的
* readObject、writeObject方法实现的，那么即使arrayList中的elementData被修饰
* 成transient的，也可以在arrayList中定义这两个方法，并在其中调用ObjectInputStream、
* ObjectOutputStream中的这个两个方法，而看arrayList源码中确实有定义这两个方法，但是现在
* 是否定义的这两个方法后就会被调用呢？这里就做了这个测试来看看序列化与反序列化是否会成功.
* @author Administrator
*
*/
public class TestSerialization implements Serializable
{
/**
*
*/
private static final long serialVersionUID = 1L;
private transient int num;
public int getNum()
{
return num;
}
public void setNum(int num)
{
this.num = num;
}
private void writeObject(java.io.ObjectOutputStream s)
throws java.io.IOException
{
s.defaultWriteObject();
s.writeObject(num);
System.out.println("writeObject of "+this.getClass().getName());
}
/**
* @param s
* @throws java.io.IOException
* @throws ClassNotFoundException
*/
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException
{
s.defaultReadObject();
num = (Integer) s.readObject();
System.out.println("readObject of "+this.getClass().getName());
}
public static void main(String[] args)
{
TestSerialization test = new TestSerialization();
test.setNum(10);
System.out.println("序列化之前的值："+test.getNum());
// 写入
try
{
ObjectOutputStream outputStream = new ObjectOutputStream(
new FileOutputStream("D:\\test.tmp"));
outputStream.writeObject(test);
} catch (FileNotFoundException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
// 读取
try
{
ObjectInputStream oInputStream = new ObjectInputStream(
new FileInputStream("D:\\test.tmp"));
try
{
TestSerialization aTest = (TestSerialization) oInputStream.readObject();
System.out.println("读取序列化后的值："+aTest.getNum());
} catch (ClassNotFoundException e)
{
e.printStackTrace();
}
} catch (FileNotFoundException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
}
}