JAVA-序列化深拷贝对象

序列化拷贝方法

@SuppressWarnings("unchecked")
public static <T extends Serializable> T clone(T obj) {
    T cloneObj = null;
    ObjectOutputStream oos = null;
    ObjectInputStream ois = null;
    try {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        oos = new ObjectOutputStream(baos);
        oos.writeObject(obj);

        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
        ois = new ObjectInputStream(bais);
        cloneObj = (T) ois.readObject();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (oos != null) {
                oos.close();
            }
            if (ois != null) {
                ois.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    return cloneObj;
}

测试

public class Address implements Serializable {
    private String address;

public class User implements Serializable {
    private Integer id;
    private String name;
    private Integer age;
    private Address address;

public static void main(String[] args) {
    Address address = new Address("wuhan");
    User user = new User(1, "asds", 18, address);

    User clone = clone(user);

    System.out.println(System.identityHashCode(user) + "\t" + user);
    System.out.println(System.identityHashCode(clone) + "\t" + clone);

    user.getAddress().setAddress("beijing");

    System.out.println(user.hashCode() + "\t" + user);
    System.out.println(clone.hashCode() + "\t" + clone);
}

需要被拷贝对象实现 Serializable 序列化接口，内部所有的属性也全部要实现序列化接口