Java基础之序列化与反序列化详解

public class User implements Serializable{
    private String name;
    private int age;
    private Date birthday;
    private transient String gender;
    private static final long serialVersionUID = -6849794470754667710L;
 
    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 Date getBirthday() {
        return birthday;
    }
 
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
 
    public String getGender() {
        return gender;
    }
 
    public void setGender(String gender) {
        this.gender = gender;
    }
 
    @Override
    public String toString() {
        return "User{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", gender=" + gender +
                ", birthday=" + birthday +
                '}';
    }
}

public class SerializableDemo {
 
    public static void main(String[] args) {
        //Initializes The Object
        User user = new User();
        user.setName("hollis");
        user.setGender("male");
        user.setAge(23);
        user.setBirthday(new Date());
        System.out.println(user);
 
        //Write Obj to File
        ObjectOutputStream oos = null;
        try {
            oos = new ObjectOutputStream(new FileOutputStream("tempFile"));
            oos.writeObject(user);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            IOUtils.closeQuietly(oos);
        }
 
        //Read Obj from File
        File file = new File("tempFile");
        ObjectInputStream ois = null;
        try {
            ois = new ObjectInputStream(new FileInputStream(file));
            User newUser = (User) ois.readObject();
            System.out.println(newUser);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } finally {
            IOUtils.closeQuietly(ois);
            try {
                FileUtils.forceDelete(file);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
 
    }
}
//output 
//User{name='hollis', age=23, gender=male, birthday=Tue Feb 02 17:37:38 CST 2016}
//User{name='hollis', age=23, gender=null, birthday=Tue Feb 02 17:37:38 CST 2016}

public class ArrayList<E> extends AbstractList<E>
        implements List<E>, RandoMaccess, Cloneable, java.io.Serializable
{
    private static final long serialVersionUID = 8683452581122892189L;
    transient Object[] elementData; // non-private to simplify nested class access
    private int size;
}

public static void main(String[] args) throws IOException, ClassNotFoundException {
        List<String> stringList = new ArrayList<String>();
        stringList.add("hello");
        stringList.add("world");
        stringList.add("hollis");
        stringList.add("chuang");
        System.out.println("init StringList" + stringList);
        ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream("stringlist"));
        objectOutputStream.writeObject(stringList);
 
        IOUtils.close(objectOutputStream);
        File file = new File("stringlist");
        ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream(file));
        List<String> newStringList = (List<String>)objectInputStream.readObject();
        IOUtils.close(objectInputStream);
        if(file.exists()){
            file.delete();
        }
        System.out.println("new StringList" + newStringList);
    }
//init StringList[hello, world, hollis, chuang]
//new StringList[hello, world, hollis, chuang]