package?com.Java;

import?java.io.FileInputStream;
import?java.io.FileNotFoundException;
import?java.io.FileOutputStream;
import?java.io.IOException;
import?java.io.ObjectInputStream;
import?java.io.ObjectOutputStream;

public?class?Objectserial?{

	public?static?void?main(String[]?args)?throws?Exception{
		String?file="exer/obj.dat";
//		//1:對象序列化
//		ObjectOutputStream?oos=new?ObjectOutputStream(
//				new?FileOutputStream(file));
//		Studentserial?stu?=new?Studentserial("1001","張安",21);
//		oos.writeObject(stu);
//		oos.flush();
//		oos.close();
		ObjectInputStream?ois=new?ObjectInputStream(
				new?FileInputStream(file));
		Studentserial?stu?=(Studentserial)ois.readObject();
		System.out.println(stu);
		ois.close();


	}

}

這一段代碼問題錯在哪兒額？

我ecplise中新建了exer文件夾