使用文件完成对象的存储和取出
//对象输出流
ObjectOutputStream objectOutputStream = new ObjectOutputStream(
new FileOutputStream(
new File("D:\\BaiduNetdiskDownload\\dailyLearning\\data.obj")));
objectOutputStream.writeObject(new Person(12,"llm"));
objectOutputStream.close();
//对象输入流
ObjectInputStream objectInputStream = new ObjectInputStream(
new FileInputStream(
new File("D:\\BaiduNetdiskDownload\\dailyLearning\\data.obj")));
Person o = (Person)objectInputStream.readObject();
System.out.println(o);
objectInputStream.close();
使用序列化的方式完成对象的深度拷贝
class CloneUtil {
//对象序列化实现对象的clone()
//先把对象序列化成字节流，然后再把字节流反序列化成对象
//@SuppressWarnings("unchecked")
public static <T extends Serializable> T clone(T obj) throws CloneNotSupportedException {
T t2 = null;
try {
//使用字节输入流完成对象序列化
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArrayOutputStream);
objectOutputStream.writeObject(obj);
objectOutputStream.close();
//把序列化的数据反序列化回去,完成clone
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
ObjectInputStream objectInputStream = new ObjectInputStream(byteArrayInputStream);
t2 = (T) objectInputStream.readObject();
objectInputStream.close();
return t2;
} catch (Exception e) {
e.printStackTrace();
}
return t2;
}
}
测试类
public static void main(String[] args) throws Exception {
Person llm = new Person(12, "llm");
Person clone = CloneUtil.clone(llm);
System.out.println(llm+"/-/ "+clone);
System.out.println(llm == clone);
}
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