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/zhuawang/p/3971437.html