1.系统环境
Windows
2.所需软件和lib
软件下载路径:http://download.csdn.net/download/xiao__gui/7586617
1). protoc.exe
2). protobuf-java-2.4.1.jar
3.demo简介
很简单的程序,基于java开发。功能是客户端把 "消息"(手机信息) 发送给 服务端。服务端收到消息后打印。
4.开发流程
1). 定义"消息"的结构,即书写接口定义文件(.proto文件)。本例中,消息包含了"手机信息"。
文件名 mobile.proto
文件内容如下:
message MobilePhone{ required string brand = 1 ; required Hardware hardware = 2; repeated string software = 3; } message Hardware { required int32 rom = 1; required int32 ram = 2; required int32 size = 3 ; }
2).通过定义的接口文件,生成Mobile.java
执行命令: protoc.exe --java_out=outputFile sourceFile
上述命令中outputFile 和 sourceFile 指 输出文件和源文件,需替换成实际文件(路径)名,如:
protoc.exe --java_out=E:\java mobile.proto
3).创建工程,编码
引入protobuf-java-2.4.1.jar
拷贝Mobile.java至工程
书写客户端,服务端代码。
具体代码如下:
客户端
package com.nevermore.client; import java.net.Socket; import com.nevermore.domain.Mobile; public class Client { /** * @param args */ public static void main(String[] args) throws Exception { // TODO Auto-generated method stub Socket socket = new Socket("127.0.0.1",3030); Mobile.MobilePhone.Builder builder = Mobile.MobilePhone.newBuilder(); Mobile.Hardware.Builder hardware = Mobile.Hardware.newBuilder(); hardware.setRam(2).setRom(16).setSize(5); builder.setHardware(hardware) .setBrand("Apple") .addSoftware("camera") .addSoftware("tecent") .addSoftware("browser") .addSoftware("player"); byte[] messageBody = builder.build().toByteArray(); int headerLen = 1; byte[] message = new byte[headerLen+messageBody.length]; message[0] = (byte)messageBody.length; System.arraycopy(messageBody, 0, message, 1, messageBody.length); System.out.println("msg len:"+message.length); socket.getOutputStream().write(message); } } 服务端:
import java.net.ServerSocket; import java.net.Socket; import com.nevermore.domain.Mobile; import com.nevermore.domain.Mobile.MobilePhone; public class Server { /** * @param args */ public static void main(String[] args) throws Exception { // TODO Auto-generated method stub ServerSocket serverSock = new ServerSocket(3030); Socket sock = serverSock.accept(); byte[] msg = new byte[256]; sock.getInputStream().read(msg); int msgBodyLen = msg[0]; System.out.println("msg body len:"+msgBodyLen); byte[] msgbody = new byte[msgBodyLen]; System.arraycopy(msg, 1, msgbody, 0, msgBodyLen); MobilePhone phone = Mobile.MobilePhone.parseFrom(msgbody); System.out.println("Receive:"); System.out.println(phone.toString()); } }
运行后服务端打印:
msg body len:48 Receive: brand: "Apple" hardware { rom: 16 ram: 2 size: 5 } software: "camera" software: "tecent" software: "browser" software: "player"