230109_50_RPC底层原理

• Hessian与jdk序列化方法对比，hessian的序列化长度更短

package com.bill.rpc09;

import com.bill.rpc.common.User;
import com.caucho.hessian.io.Hessian2Input;
import com.caucho.hessian.io.Hessian2Output;

import java.io.*;

/**
 * @Auther: wangchunwen
 * @Date: 2023/1/9 - 01 - 09 - 23:11
 * @Description: com.bill.rpc09
 * @version: 1.0
 */
public class HessianVSJDK {
    public static void main(String[] args) throws IOException {
        User u = new User(1,"zhangsan");
        System.out.println("hessian:"+hessianSeriable(u).length);
        System.out.println("jdk:"+jdkSeriable(u).length);
    }
	
    // hessian序列化
    public static byte[] hessianSeriable(Object o) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        Hessian2Output output = new Hessian2Output(baos);
        output.writeObject(o);
        output.flush();
        byte[] bytes = baos.toByteArray();
        baos.close();
        output.close();
        return bytes;
    }
    
    // hessian反序列化
    public static Object hessianDeseriable(byte[] bytes) throws IOException {
        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
        Hessian2Input input = new Hessian2Input(bais);
        Object o = input.readObject();
        bais.close();
        input.close();
        return o;
    }

    // jdk seriable序列化
    public static byte[] jdkSeriable(Object o) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(o);
        oos.flush();
        byte[] bytes = baos.toByteArray();
        baos.close();
        oos.close();
        return bytes;
    }

    // jdk seriable反序列化
    public static Object jdkDeseriable(byte[] bytes) throws IOException, ClassNotFoundException {
        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
        ObjectInputStream ois = new ObjectInputStream(bais);
        Object o = ois.readObject();
        bais.close();
        ois.close();
        return o;
    }
}

• RPC通信协议

| http：传文本 |
| http2.0：可以传二进制 |
| TCP：同步/异步；阻塞/非阻塞 |
| WebService |