In -depth analysis of the technical principles of the KRYO framework in the Java class library
Kryo is a high -performance serialization framework in the Java class library. It can convert the Java object into byte flow with very high efficiency to use it in network transmission or storage.KRYO's design concept is to improve serialization and derivativeization performance by using high -efficiency binary coding and serialization technology.
Kryo's technical principles include the following important aspects:
1. Serialization and deepening strategies: Kryo provides a variety of serialization and deepericularization strategies, which can choose appropriate strategies as needed.By default, Kryo will automatically process the serialization and derivativeization of the object through the Java reflection mechanism, but it can also optimize the serialized performance of specific types by registering a custom serializer.
2. Compact binary format: In order to improve the efficiency of serialization and device, Kryo uses a compact binary format to represent objects.This format uses a variety of optimization techniques, such as using variable codes to represent integers, string lengths, and array length to reduce byte occupation.
3. Caches and reuse: Kryo provides an object cache and reuse mechanism to reduce the overhead of memory distribution and garbage recycling.By reusing existing objects, it can reduce the creation and destruction operation of objects in the process of serialization and deepertine, thereby improving performance.
The following is a sample code that shows how to use Kryo for the serialization and derivativeization of the object:
import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;
public class KryoExample {
public static void main(String[] args) {
// Create Kryo object
Kryo kryo = new Kryo();
// Serialized objects
byte[] bytes;
try (Output output = new Output(4096)) {
// Write the object to the byte array
MyObject obj = new MyObject();
kryo.writeObject(output, obj);
bytes = output.toBytes();
}
// Reverse sequentialization object
try (Input input = new Input(bytes)) {
// Read the object from the byte array
MyObject newObj = kryo.readObject(input, MyObject.class);
System.out.println(newObj.toString());
}
}
}
class MyObject {
private int id;
private String name;
// omit the constructor and getter/setter method
@Override
public String toString() {
return "MyObject{" +
"id=" + id +
", name='" + name + '\'' +
'}';
}
}
In the above example, we first create a Kryo object, and then serialize a customized MyObject object, and store the serialized results in the byte array.Then, we passed the byte array to the Kryo object through the input stream, carry out a back -sequential operation, and print out the results.
In summary, Kryo realizes high -performance serialization and dependentization functions by using high -efficiency binary coding and serialization strategies, as well as technical principles such as cache and reuse objects.It performed well in large data volume and high merger, and became one of the serialized frameworks commonly used in Java development.
