序列化拷贝方法

@SuppressWarnings("unchecked")public static 
     
       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