What?浅拷贝和深拷贝发生在对象和对象之间假设你需要将一个对象的值赋予给另一个对象这个过程就叫做拷贝。那么拷贝的过程中对象的属性中可能既有普通变量也有对象能够复制后副本对象的引用指向新地址的就是深拷贝仍指向旧的地址那一般也就是浅拷贝了。How?1.重写clone方法对于拷贝的一个办法就是重写cloneable类的clone方法参考下面的示例浅拷贝public class Address implements Cloneable{ private String name; Override public Address clone(){ try{ return (Address) super.clone(); }catch(CloneNotSupportedException e){ throw new AssertionError(); } } } public class Person implements Cloneable{ private String name; private Address address; Override public Person clone(){ try{ Person p (Person) super.clone(); return p; }catch(CloneNotSupportedException e){ throw new AssertionError(); } } }以上代码展示的就是浅拷贝。深拷贝public class Person implements cloneable throws CloneNotSupportedException{ Override public Person clone(){ try{Person person (Person) super.clone(); person.setAddress(person.getAddress().clone()); return person; }catch(CloneNotSupportedException e){ throw new AssertionError(); } } }2.序列化进行拷贝(深拷贝)class Person implements Serializable{ private String name; private Address address; public Person deepCopy(){ try{ ByteArrayOutputStream bos new ByteArrayOutputStream(); ObjectOutputStream oos new ObjectOutputStream(bos); oos.writeObject(this); oos.flush(); oos.close(); ByteArrayInputStream bis new ByteArrayInputStream(bos.toByteArray()); ObjectInputStream ois new ObjectInputStream(bis); return (Person) ois.readObject(); }catch(IOException | ClassNotFoundException e){ e.printStackTrace(); return null; } } class Address implements Serializable { private static final long seriaVersionUTI 1L; } }这块可以对Java IO部分的内容进行复习回顾比如什么是装饰者模式手动递归复制class Person{ private String name; private Address address; public Person deepCopy(){ Person copy new Person(); copy.setName(this.name); copy.setAddress(this.address.deepCopy()); return copy; } } class Address{ private int code; public Address deepCopy(){ Address copy new Address(); copy.setCode(this.code); return copy; } }总结:浅拷贝:重写Cloneable类的clone方法深拷贝重写Cloneable类的clone方法继承Serializable类后利用序列化和反序列化手动递归调用deepCopy方法