在Eclipse中配置google protobuf

http://code.google.com/intl/zh-CN/apis/protocolbuffers/docs/javatutorial.html 

http://code.google.com/intl/zh-CN/apis/protocolbuffers/docs/reference/java/index.html 
http://code.google.com/intl/zh-CN/apis/protocolbuffers/docs/proto.html 
http://code.google.com/intl/zh-CN/apis/protocolbuffers/docs/reference/java-generated.html 
http://code.google.com/intl/zh-CN/apis/protocolbuffers/docs/encoding.html

1. 下载：

http://code.google.com/p/protobuf/downloads/list

2.解压文件到：

D:\Java\protoc

将descriptor.proto生成java 代码，

D:\Java\protoc>protoc.exe -h

D:\Java\protoc>protoc.exe –java_out=./ D:\Java\protoc\protobuf-2.0.0beta\src\google\protobuf\descriptor.proto

dos下执行：protoc --version  查看版本。  

// 然后：D:\Java\protoc>protoc --java_out=. descriptor.proto

3.在Eclipse中新建java工程

工程路径在：E:\lizongbo\workspace\protobuf

复制D:\Java\protoc下生成的com目录到E:\lizongbo\workspace\protobuf\src

复制D:\Java\protoc\protobuf-2.0.0beta\java\src\main\java下的com目录到E:\lizongbo\workspace\protobuf\src

4.定义一个proto文件

参考：http://code.google.com/apis/protocolbuffers/docs/proto.html

qquser.txt内容如下：

option java_package = “com.lizongbo.beans”;
 option java_outer_classname = “QQUserProtos”; message QQUser {
 required int32 uin = 1 [default = 10000];
 required string nick = 2 [default = "n"];
 required int32 age = 3 [default = 20];
 required int32 faceId = 4 [default = 0];
 }

5.生成java代码：protoc.exe –java_out=./ qquser.txt

// protoc --java_out=. qquser.txt

6.测试代码：

package com.lizongbo.beans;
 public class Test {
 
 public static void main(String[] args) {
 QQUserProtos.QQUser.Builder builder = QQUserProtos.QQUser.newBuilder();
 builder.setAge(30);
 builder.setFaceId(2);
 builder.setNick(“lizongbo”);
 builder.setUin(10000);
 QQUserProtos.QQUser user = builder.build();
 System.out.println(user.toString());
 System.out.println(user.toByteString().toStringUtf8());
 } }

7.例子可以使用了。