(Object serialization) Basic concepts of object serialization

Basic concepts of object serialization

Almost as long as it is java development, there must be a concept of serialization, and because the concept of serialization has gradually developed, there will be more serialization annotations gradually.

The basic definition of serialization: The objects stored in the memory are processed in the form of a binary data stream, which can realize the storage of the objects or network transmission.

 However, not all objects can be serialized. There is a mandatory requirement in Java: If you want to serialize an object, the class where the object is located must implement the java.io.Serializable parent interface as a serialization mark. This interface has no methods, it describes the capabilities of a class.

Example: Define a class that can be serialized

class Person implements Serializable{   //Person类可以被序列化

    private String name;
    private int age;

    public Person(String name,int age){
        this.name  = name ;
        this.age = age;
    }
    @Override
    public String toString(){
        return "姓名："+this.name+"、年龄："+this.age;
    }
}

At this time, every object generated by Person can realize binary data transmission and belongs to a program class that can be serialized.