Protocol Buffer Java实例

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());

    }

}

巴特西

Protocol Buffer Java实例

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