Protobuf 简介

1. 下载编译文件：protoc-2.6.0-win32.zip

https://sourceforge.net/projects/protobuf/?source=typ_redirect

 

 

2. 导入开发包

<dependency>

<groupId>com.google.protobuf</groupId>

<artifactId>protobuf-java</artifactId>

<version>2.6.1</version>

</dependency>

 

 

3. 编写Message文件

addressbook.proto

// See README.txt for information and build instructions.

package tutorial;

option java_package = "org.hdp.practice.serial";
option java_outer_classname = "AddressBookProtos";

message Person {
  required string name = 1;
  required int32 id = 2;        // Unique ID number for this person.
  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;
}

// Our address book file is just one of these.
message AddressBook {
  repeated Person person = 1;
}

 

 

 

4. 编译Message文件

protoc --java_out=. addressbook.proto

生成：AddressBookProtos.java文件，将此文件复制到包路径org.hdp.practice.serial下

 

 

5.编写序列化和反序列化代码测试代码

public class SerializationByProtobuf {
	public static void main(String[] args) throws Exception{
		writeProtobuf();
		//readProtobuf();
	}
	
	static void readProtobuf() throws Exception{
		Person person = Person.parseDelimitedFrom(new FileInputStream("D:/tmp/address.data"));
		System.out.println(person.getEmail());
	}
	
	static void writeProtobuf() throws Exception{
		Person person = Person.newBuilder()
				.setId(1)
				.setName("tom")
				.setEmail("[e-mail]")
				.addPhone(Person.PhoneNumber.newBuilder()
						.setNumber("12321324234")
						.setType(Person.PhoneType.HOME).build())
				.build();
		person.writeDelimitedTo(new FileOutputStream("D:/tmp/address.data"));	
	}

}