高效的、可扩展的对结构化数据进行编码的格式规范

下面介绍的是使用Java ProtoBuf的基本步骤：

1. ，选择其中的win版本下载

2.下载一个protobuf-java-2.4.1.jar文件（注意，要与你刚才下的proto.exe版本相同，否则可能出现编译通不过现象）

3.在proto.exe同级目录，编写一个msg.proto文件：

package tutorial;   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;   }

4.使用如下命令编译这个文件：

5.将生成的ProtoBufferPractice.java文件引入eclipse

6.把下载的protobuf-java-2.4.1.jar也引入工程

7.使用方法：

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;import com.protobuftest.protobuf.PersonProbuf.Person.PhoneNumberOrBuilder;import com.protobuftest.protobuf.PersonProbuf.Person.PhoneType;public class ProtoBufTest {	/**	 * @param args	 */	public static void main(String[] args) {		// TODO Auto-generated method stub		PersonProbuf.Person.Builder builder = PersonProbuf.Person.newBuilder();		builder.setEmail("kkk@email.com");		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
    
      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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