java泛型方法,序列化與還原序列化

import java.io.*;public class GenericMethodTest {    public static void main(String[] args) {        Student stu=new Student();        stu.name="雷鋒";        stu.age=100;        String fileName="e:/a.dat";        try {            toFile(stu,fileName);        } catch (IOException e) {            e.printStackTrace();        }                                try {            Student stu_1=fromFile(fileName);            System.out.println(stu_1);        } catch (IOException e) {            e.printStackTrace();        } catch (ClassNotFoundException e) {            e.printStackTrace();        }    }        private static <T> void toFile(T t,String fileName) throws IOException{        FileOutputStream fos=new FileOutputStream(fileName);        ObjectOutputStream oos=new ObjectOutputStream(fos);        oos.writeObject(t);        oos.flush();        oos.close();    }        private static <T> T fromFile(String fileName) throws IOException, ClassNotFoundException{        FileInputStream fis=new FileInputStream(fileName);        ObjectInputStream oid=new ObjectInputStream(fis);        @SuppressWarnings("unchecked")        T t=(T)oid.readObject();        return t;    }}import java.io.Serializable;@SuppressWarnings("serial")public class Student implements Serializable {    public String name;    public int age;    @Override    public String toString(){        return name+" : "+age;    }}