1..proto文件为要生成.java文件的模板文件，其中包含名称空间、文件名等信息
2.cmd中进入当前目录D:\JAVA\protoc-2.5.0-win32
3.运行 protoc.exe --java_out=. SubscribeReq.proto 将在当前文件夹下生成对应的.java文件
SubscribeReq.proto
package netty;
option java_package="myprotobuf";
option java_outer_classname="SubscribeReqProto";
message SubscribeReq{
required int32 subReqID=1;
required string userName=2;
required string productName=3;
repeated string address=4;
}
SubscribeReq.proto
package netty;
option java_package="myprotobuf";
option java_outer_classname="SubscribeRespProto";
message SubscribeResp{
required int32 subReqID=1;
required int32 respCode=2;
required string desc=3;
}
原文：http://www.cnblogs.com/dongweiq/p/3992572.html