序列化json和protobuf大小比較

使用protobuf序列化為二進制和json序列化字符串大小比較

代碼demo

package com.gxf.demo;

import java.io.*;

public class PtotobufDemo {

    public static void main(String[] args) throws IOException {
        AddressBookProtos.Person gxf =
                AddressBookProtos.Person.newBuilder()
                        .setId(1234)
                        .setName("guan xianseng")
                        .setEmail("[e-mail]")
                        .addPhones(
                                AddressBookProtos.Person.PhoneNumber.newBuilder()
                                        .setNumber("555-4321")
                                        .setType(AddressBookProtos.Person.PhoneType.HOME))
                        .build();

        String s = gxf.toString();
        System.out.println("json length: " + s.length());
        System.out.println(s);

        byte[] bytes = gxf.toByteArray();
        String filePath = "./log";
        File logFile = new File(filePath);
        OutputStream outputStream = new FileOutputStream(logFile);
        gxf.writeTo(outputStream);

        //json寫到文件
        writeTextFile(s);


        System.out.println(bytes.length);
    }


    /**
     * 寫入文本文件
     * */
    private static void writeTextFile(String content) throws IOException {
        File writename = new File("./json.txt"); // 相對路徑，如果沒有則要建立一個新的output。txt文件
        writename.createNewFile(); // 創建新文件
        BufferedWriter out = new BufferedWriter(new FileWriter(writename));
        out.write(content); // \r\n即為換行
        out.flush(); // 把緩存區內容壓入文件
        out.close(); // 最后記得關閉文件
    }
}

proto文件

syntax = "proto2";

package demo;

option java_package = "com.gxf.demo";
option java_outer_classname = "AddressBookProtos";

message Person {
  required string name = 1;
  required int32 id = 2;
  optional string email = 3;

  enum PhoneType {
    MOBILE = 0;
    HOME = 1;
    WORK = 2;
  }

  message PhoneNumber { 
    required string number = 1;
    optional PhoneType type = 2 [default = HOME];
  }

  repeated PhoneNumber phones = 4;
}

message AddressBook {
  repeated Person people = 1;
}

pb:58字節

json:110字節，刪掉空格還有100字節