Java serialization is what? You know when you need to be serialized?
What is java serialization? You need to serialize under what circumstances?
Serialization: process converts Java objects into a stream of bytes.
Deserialization: byte transfer process into Java objects.
When a Java object need to be transmitted over a network or the persistent storage into a file, it is necessary to process Java object serialization.
Realized sequence: class implements Serializable interface, this interface does not need to implement the method of. Implement Serializable to tell jvm objects of this class can be serialized.
Precautions:
A class can be serialized, the subclasses may be serialized
Declared as a member variable static and transient and can not be serialized. static member variables are described class-level attributes, transient temporary data representation
Deserializing serialized objects sequentially read consistency
Specific use
package constxiong.interview;
import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable;
/**
* 测试序列化，反序列化
* @author ConstXiong
* @date 2019-06-17 09:31:22
*/public class TestSerializable implements Serializable {
private static final long serialVersionUID = 5887391604554532906L;
private int id;
private String name;
public TestSerializable(int id, String name) { this.id = id; this.name = name;
}
@Override
public String toString() { return "TestSerializable [id=" + id + ", name=" + name + "]";
}
@SuppressWarnings("resource") public static void main(String[] args) throws IOException, ClassNotFoundException { //序列化
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("TestSerializable.obj"));
oos.writeObject("测试序列化");
oos.writeObject(618);
TestSerializable test = new TestSerializable(1, "ConstXiong");
oos.writeObject(test);
//反序列化
ObjectInputStream ois = new ObjectInputStream(new FileInputStream("TestSerializable.obj"));
System.out.println((String)ois.readObject());
System.out.println((Integer)ois.readObject());
System.out.println((TestSerializable)ois.readObject());
}
}
Print Results:
The test sequence of 618 TestSerializable [=. 1 ID, name = ConstXiong]
Like this article, you can point to the author likes to point at attention, will share Java-related articles every day!
Remember to focus on me oh, will occasionally presented benefits, including consolidation of interview questions, learning materials, source code, etc. ~ ~