（一）Java使用Protobuf

学习使用Protobuf，创建java文件

windows :

步骤一：两个文件：proto.exe,  protobuf-Java-2.4.1.jar

步骤二：建立一个工程CreateProtoBuf，在下面建立一个proto文件件，用来存放【proto】文件

步骤三：将proto,exe放在工程下，

步骤四：建立一个msg.proto文件：

 1 option java_package = "com.protobuftest.protobuf";
 2 option java_outer_classname = "PersonProbuf";
 3
 4 message Person
 5 {
 6   required string name = 1;
 7   required int32 id = 2;
 8   optional string email = 3;
 9
10   enum PhoneType
11   {
12     MOBILE = 0;
13     HOME = 1;
14     WORK = 2;
15   }
16
17   message PhoneNumber
18   {
19     required string number = 1;
20     optional PhoneType type = 2 [default = HOME];
21   }
22
23   repeated PhoneNumber phone = 4;
24
25   message CountryInfo
26   {
27           required string name = 1;
28           required string code = 2;
29           optional int32 number = 3;
30   }
31 }
32
33 message AddressBook
34  {
35   repeated Person person = 1;
36 } 

步骤五：生成 java文件：在proto.exe目录下：protoc  --java_out=./src   ./proto/msg.proto

步骤六：测试实例

 1 package com.protobuftest.protobuf;
 2
 3 import java.util.List;
 4
 5 import com.google.protobuf.InvalidProtocolBufferException;
 6 import com.protobuftest.protobuf.PersonProbuf;
 7 import com.protobuftest.protobuf.PersonProbuf.Person;
 8 import com.protobuftest.protobuf.PersonProbuf.Person.PhoneNumber;
 9
10 public class Test
11 {
12     /**
13      * @param args
14      */
15     public static void main(String[] args)
16     {
17         PersonProbuf.Person.Builder builder = PersonProbuf.Person.newBuilder();
18         builder.setEmail("[email protected]");
19         builder.setId(1);
20         builder.setName("筱灬湘子");
21         builder.addPhone(PersonProbuf.Person.PhoneNumber.newBuilder().setNumber("1001").setType(PersonProbuf.Person.PhoneType.MOBILE));
22         builder.addPhone(PersonProbuf.Person.PhoneNumber.newBuilder().setNumber("1002").setType(PersonProbuf.Person.PhoneType.HOME));
23
24         Person person = builder.build();
25         byte[] buf = person.toByteArray();
26
27         try
28         {
29             Person person2 = PersonProbuf.Person.parseFrom(buf);
30
31             System.out.println(person2.getName() + ", " + person2.getEmail());
32
33             List<PhoneNumber> lstPhones = person2.getPhoneList();
34
35             for (PhoneNumber phoneNumber : lstPhones)
36             {
37                 System.out.println(phoneNumber.getNumber());
38             }
39         }
40         catch (InvalidProtocolBufferException e)
41         {
42             e.printStackTrace();
43         }
44
45         System.out.println(buf);
46     }
47 }

工程目录如下：