一、参考文献

1.1 https://blog.csdn.net/forwujinwei/article/details/79915872

1.2 

二、深度拷贝实现方式1

2.1 通过序列化实现深拷贝

2.1.1 注意事项

2.1.1.1 用此方法写深度拷贝的类需要实现Serializable, Cloneable 接口

2.1.1.2 字段引用的对象要实现Serializable

public class Cat implements Serializable, Cloneable {    private String name;    private String color;    private Dog friend;    public Cat deepClone() throws IOException, ClassNotFoundException {        //将对象写入流中        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();        ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream);        objectOutputStream.writeObject(this);        //从流中取出        ByteArrayInputStream inputStream = new ByteArrayInputStream(outputStream.toByteArray());        ObjectInputStream objectInputStream = new ObjectInputStream(inputStream);        return (Cat) objectInputStream.readObject();    }}

2.2 通过Jackson实现

2.2.1 性能不清楚，但是这个方式比较方便

ObjectMapper mapper = new ObjectMapper(); String catString = mapper.writeValueAsString(cat); Cat catCopy = mapper.readValue(catString, Cat.class);

工具类

public static 
    
      T deepClone(T obj) {        try {            String s = mapper.writeValueAsString(obj);            T t = mapper.readValue(s, (Class
     
      ) obj.getClass());            return t;        } catch (Exception e) {            log.error("deepClone error{}", e);        }        return null;    }//使用Cat catCopy = deepClone(cat);
     
    

2.3 commons-beanutils工具类（推荐此方法）

    	
     
      commons-beanutils
     	
     
      commons-beanutils
     	
     
      1.9.3