Java学习(尚硅谷)IO流学习之对象流

package com.atguigu.java;


import org.junit.Test;

import java.io.*;


public class ObjectInputOutputStreamTest {
    
    @Test
    public void testObjectOutputStream(){
        ObjectOutputStream oos = null;
        try {
            //1.
            oos = new ObjectOutputStream(new FileOutputStream("object.dat"));
            //2.
            oos.writeObject(new String("浙江大学"));
            oos.flush();//刷新操作

            oos.writeObject(new Person("Tom",23));
            oos.flush();

            oos.writeObject(new Person("Jerry",23,new Account(5000)));
            oos.flush();

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //3.
            if (oos!=null){

                try {
                    oos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    @Test
    public void testObjectInputStream(){
        ObjectInputStream ois = null;
        try {
            ois = new ObjectInputStream(new FileInputStream("object.dat"));
            Object o = ois.readObject();
            String str=(String)o;
            System.out.println(str);

            Object o1=ois.readObject();
            Person p1=(Person)o1;
            System.out.println(p1);

            Object o2=ois.readObject();
            Person p2=(Person)o2;
            System.out.println(p2);

        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } finally {
            if (ois!=null){

                try {
                    ois.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }


    }
}

package com.atguigu.java;

import java.io.Serializable;


public class Person implements Serializable {
    public static final long serialVersionUID = 465456442L;
    private String name;
    private int age;
    private Account acct;

    public Person() {
    }

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }



    public Person(String name, int age, Account acct) {
        this.name = name;
        this.age = age;
        this.acct = acct;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + ''' +
                ", age=" + age +
                ", acct=" + acct +
                '}';
    }
}

class Account implements Serializable{
    public static final long serialVersionUID = 42456465L;
    double balance;

    public Account(double balance) {
        this.balance = balance;
    }

    public double getBalance() {
        return balance;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }

    @Override
    public String toString() {
        return "Account{" +
                "balance=" + balance +
                '}';
    }
}

package com.atguigu.java;

import java.io.Serializable;


public class Person implements Serializable {
    public static final long serialVersionUID = 465456442L;
    private String name;
    private int age;
    private Account acct;

    public Person() {
    }

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }



    public Person(String name, int age, Account acct) {
        this.name = name;
        this.age = age;
        this.acct = acct;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + ''' +
                ", age=" + age +
                ", acct=" + acct +
                '}';
    }
}

class Account implements Serializable{
    public static final long serialVersionUID = 42456465L;
    double balance;

    public Account(double balance) {
        this.balance = balance;
    }

    public double getBalance() {
        return balance;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }

    @Override
    public String toString() {
        return "Account{" +
                "balance=" + balance +
                '}';
    }
}