Protobuf 之java使用篇

碰巧用到Proto,算是笔记吧算是笔记吧，

windows :

1,两个文件：proto.exe,  protobuf-Java-2.4.1.jar

2,建立一个工程TestPb，在下面建立一个proto文件件，用来存放【。proto】文件

3，将proto,exe放在工程下，

4，建立一个msg.proto文件：

option java_package = "com.protobuftest.protobuf"; 
option java_outer_classname = "PersonProbuf"; 
 
message Person { 
  required string name = 1; 
  required int32 id = 2; 
  optional string email = 3; 
 
  enum PhoneType { 
    MOBILE = 0; 
    HOME = 1; 
    WORK = 2; 
  } 
 
  message PhoneNumber { 
    required string number = 1; 
    optional PhoneType type = 2 [default = HOME]; 
  } 
 
  repeated PhoneNumber phone = 4; 
 
  message CountryInfo {
          required string name = 1;
          required string code = 2;
          optional int32 number = 3;
  }
} 
 
message AddressBook { 
  repeated Person person = 1; 
} 

5，生成 java文件：在proto.exe目录下：protoc  --java_out=./src   ./proto/msg.proto

6,copy个测试示例了

新建一个文件TestPb.java

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package com.protobuftest.protobuf;

 

import java.util.List;

 

import com.google.protobuf.InvalidProtocolBufferException;

import com.protobuftest.protobuf.PersonProbuf;

import com.protobuftest.protobuf.PersonProbuf.Person;

import com.protobuftest.protobuf.PersonProbuf.Person.PhoneNumber;

 

public class TestPb {

 

/**

 * @param args

 */

public static void main(String[] args) {

// TODO Auto-generated method stub

PersonProbuf.Person.Builder builder = PersonProbuf.Person.newBuilder();

builder.setEmail("[e-mail]");

builder.setId(1);

builder.setName("TestName");

builder.addPhone(PersonProbuf.Person.PhoneNumber.newBuilder().setNumber("131111111").setType(PersonProbuf.Person.PhoneType.MOBILE));

builder.addPhone(PersonProbuf.Person.PhoneNumber.newBuilder().setNumber("011111").setType(PersonProbuf.Person.PhoneType.HOME));

 

Person person = builder.build();

byte[] buf = person.toByteArray();

 

try {

Person person2 = PersonProbuf.Person.parseFrom(buf);

System.out.println(person2.getName() + ", " + person2.getEmail());

List<PhoneNumber> lstPhones = person2.getPhoneList();

for (PhoneNumber phoneNumber : lstPhones) {

System.out.println(phoneNumber.getNumber());

}

} catch (InvalidProtocolBufferException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

 

System.out.println(buf);

 

}

 

}

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生成java文件:PersonProbuf.java 

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工程文件结构：