package cm;
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;
import java.util.Date;;

public class test20180425Externalizable {
//当调用Objectoutputstream的writeObject()方法的时候，会默认调用缺省的writeObject（）方法。如果你要序列化的对象添加了一个writeobject（）方法。则会调用你添加的
//writeobject（）方法。//这里使用添加的writeobject方法使得transient修饰的对象能序列。因为缺省的writeobject方法不序列化transient字段。
//class类对象默认继承serializable接口的。缺省序列化方法不能序列化static字段。
	public static void main(String[] args) {
	    Date date=new Date();
	    System.out.println(date);
	    try {
			ObjectOutputStream out=new ObjectOutputStream(new FileOutputStream("D:\\ser.out"));
			serializabletest sr=new serializabletest("bigseacoming","123");
			out.writeObject(sr);
			
			//输出序列化对象。
			ObjectInputStream in=new ObjectInputStream(new FileInputStream("D:\\ser.out"));
			serializabletest srin=(serializabletest) in.readObject();
			System.out.println(srin.toString());
			
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
	}

}
class serializabletest implements Serializable{
	private String  name;
	private transient String password;
	public serializabletest(String name,String password) {
		this.name=name;
		this.password=password;
	}
	private void writeObject(ObjectOutputStream out) {
		try {
			out.defaultWriteObject();
			out.writeObject(password);
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}
	private void readObject(ObjectInputStream in) throws IOException {
		try {
			in.defaultReadObject();
			password=(String) in.readObject();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		
	}
	public String toString() {
		return "name:"+name+"\npassword:"+password;
	}
}