java 深拷贝
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- 拷贝的类实现序列化
implements Serializable - 添加序列化id
private static final long serialVersionUID = 6957528274628957691L; - 使用拷贝方法
Car car2 = SerialiazableUtil.deepCloneObject(car); - 使用的方法
import java.io.*; public class SerialiazableUtil { public SerialiazableUtil() { throw new AssertionError(); } @SuppressWarnings("unchecked") public static <T extends Serializable> T deepCloneObject(Object object) throws IOException { T deepClone = null; ObjectInputStream ois = null; try (ByteArrayOutputStream baos = new ByteArrayOutputStream(); ObjectOutputStream oos = new ObjectOutputStream(baos); ) { oos.writeObject(object); ByteArrayInputStream bais = new ByteArrayInputStream(baos .toByteArray()); ois = new ObjectInputStream(bais); deepClone = (T) ois.readObject(); } catch (IOException | ClassNotFoundException e) { e.printStackTrace(); } finally { if (ois != null) { ois.close(); } } return deepClone; } } - 示例
import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import org.springframework.beans.BeanUtils; import java.io.IOException; import java.io.Serializable; @AllArgsConstructor @Data @NoArgsConstructor public class Car implements Serializable { private static final long serialVersionUID = 6957528274628957691L; private String brand;//品牌 private int maxSpeed;//最高时速 public static void main(String[] args) throws IOException { Car car = new Car("bc", 133); Car car1 = new Car(); //浅拷贝 BeanUtils.copyProperties(car, car1); // 深拷贝 Car car2 = SerialiazableUtil.deepCloneObject(car); System.out.print("Java默认序列化方式："); // System.out.println(person.getCar()==person1.getCar()); System.out.println(car); System.out.println("========================="); System.out.println(car1); System.out.println("========================="); System.out.println(car.brand == car2.brand); } }
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