深度克隆

public class MyUtil {
    /**
     * 通过序列化实现深度克隆
     * 先序列化对象到内存
     * 再反序列化对象并返回
     *
     * @param obj
     * @param <T>
     * @return
     * @throws Exception
     */
    public static <T extends Serializable> T clone(T obj) throws Exception {
        /**
         * 先序列化对象到内存
         */
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream);
        objectOutputStream.writeObject(obj);
        /**
         * 反序列对象并返回
         */
        ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(outputStream.toByteArray());
        ObjectInputStream objectInputStream = new ObjectInputStream(byteArrayInputStream);
        return (T) objectInputStream.readObject();
    }
}