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大家要先下载protobuffer，在这里：
https://code.google.com/p/protobuf/downloads/list
注意，需要下载两个，一个是complier，另外一个是source code (我下载的是2.5的版本);
讲complier对应的 protoc.exe 拷贝至 source code 对应的./protobuf-2.5.0/src目录下（mvn 编译需要）;
cd 到 ./protobuf-2.5.0/java 目录， 执行 mvn clean package 命令打包；
到target目录获取生成的protobuf-java-2.5.0.jar包（Java代码对protobuf依赖的jar包）；
person.proto文件
package com.shine.pb; option java_package = "com.shine.pb.person"; option java_outer_classname = "MyPerson"; message Person { required int32 id = 1; required string name = 2; optional string email = 3; enum PhoneType { MOBILE = 0; FIXED = 1; } message PhoneInfo { required string number = 1; required PhoneType type = 2 [default=MOBILE]; } optional PhoneInfo phone = 4; }
到protoc.exe所在目录，执行 protoc --java_out=./output/java ./messages/MyMessage.proto
可生成proto文件对应的Java类；
copy到自己eclipse对应src后；写main方法测试，代码如下：
package com.shine.pb.person; import com.google.protobuf.InvalidProtocolBufferException; import com.shine.pb.person.MyPerson.Person.PhoneType; public class Test { public static void main(String[] args) throws InvalidProtocolBufferException { MyPerson.Person.Builder builder = MyPerson.Person.newBuilder(); builder.setId(1); builder.setName("shine"); builder.setEmail("chenguodong@baidu.com"); MyPerson.Person.PhoneInfo.Builder phoneInfoBuilder = MyPerson.Person.PhoneInfo.newBuilder(); phoneInfoBuilder.setNumber("13899999999"); phoneInfoBuilder.setType(PhoneType.MOBILE); builder.setPhone(phoneInfoBuilder.build()); MyPerson.Person shine = builder.build(); System.out.println(shine.getSerializedSize()); System.out.println(shine.getEmail()); System.out.println(shine.getName()); System.out.println(shine.getPhone().getNumber()); System.out.println("============================================="); byte[] data = shine.toByteArray(); builder = MyPerson.Person.newBuilder(); MyPerson.Person person = MyPerson.Person.parseFrom(data); System.out.println(person.getSerializedSize()); System.out.println(person.getEmail()); System.out.println(person.getName()); System.out.println(person.getPhone().getNumber()); } }
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原文地址：http://www.cnblogs.com/shine_cn/p/4318980.html
