Java中对象的序列化方式克隆详解
Java 序列化技术可以使你将一个对象的状态写入一个Byte 流里,并且可以从其它地方把该Byte 流里的数据读出来,重新构造一个相同的对象。
简述:
用字节流的方式,复制Java对象
代码:
流克隆复制函数
public static Object deepClone(Object obj){ if(obj == null){ return null; } try { ByteArrayOutputStream byteOut = new ByteArrayOutputStream(); Object cloneObj = null; ObjectOutputStream out = new ObjectOutputStream(byteOut); out.writeObject(obj); ByteArrayInputStream byteIn = new ByteArrayInputStream(byteOut.toByteArray()); ObjectInputStream in = new ObjectInputStream(byteIn); cloneObj = in.readObject(); return cloneObj; } catch (Exception e) { throw new RuntimeException(e); } }
ObjectClone.java
package test; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.Serializable; public class ObjectClone { /** * 测试对象 */ private static class Person implements Serializable { private String name; private int age; Person(String name, int age){ this.name = name; this.age = age; } @Override public String toString() { return String.format("name: %s\nage: %s", name, age); } } /** * 测试函数 */ public static void main(String[] args) { Person person = new Person("Henry", 22); Person newPerson = (Person)ObjectClone.deepClone(person); System.out.println(newPerson); } /** * 工具类 * * @param obj * @return */ public static Object deepClone(Object obj){ if(obj == null){ return null; } try { ByteArrayOutputStream byteOut = new ByteArrayOutputStream(); Object cloneObj = null; ObjectOutputStream out = new ObjectOutputStream(byteOut); out.writeObject(obj); ByteArrayInputStream byteIn = new ByteArrayInputStream(byteOut.toByteArray()); ObjectInputStream in = new ObjectInputStream(byteIn); cloneObj = in.readObject(); return cloneObj; } catch (Exception e) { throw new RuntimeException(e); } } }
测试结果:
总结
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