集合对象深拷贝方法

// 对象要序列化接口 Serializable 提供 serialVersionUID 字段
public static <T> List<T> deepCopy(List<T> src) {
        ByteArrayOutputStream byteout = null;
        ObjectOutputStream out = null;
        ByteArrayInputStream bytein = null;
        ObjectInputStream in = null;
        try {
            byteout = new ByteArrayOutputStream();
            out = new ObjectOutputStream(byteout);
            out.writeObject(src);
            bytein = new ByteArrayInputStream(byteout.toByteArray());
            in = new ObjectInputStream(bytein);
            @SuppressWarnings("unchecked")
            List<T> dest = (List<T>) in.readObject();
            return dest;
        } catch (ClassNotFoundException | IOException e) {
            e.printStackTrace();
            return null;
        } finally {
            if (byteout!=null) {
                try {
                    byteout.close();
                } catch (IOException ignore) {}
            }
            if (out!=null) {
                try {
                    out.close();
                } catch (IOException ignore) {}
            }
            if (bytein!=null) {
                try {
                    bytein.close();
                } catch (IOException ignore) {}
            }
            if (in!=null) {
                try {
                    in.close();
                } catch (IOException ignore) {}
            }
        }
    }