序列化数据的要求

1.        效率  时间空间
2.        多语言相互操作
3.        使用方便

ProtoBuffer 使用：

1. Designing objects

   Person:IdNameAgeEmailPhone(s)

   　　

2. Describing objects

   Person:required int32 idrequired string nameoptional string emailrepeated string phone

    

3. Compiling the description

   package tutorial;option java_package  = "com.example.tutorial";option java_outer_classname  = "AddressBookProtos";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  AddressBook {repeated Person person  = 1;}

   protoc --java_out=$DST_DIR addressbook.proto

    

4. Obtaining the generated source-code

5. Importing objects into your project

6. Instantiating objects

   Person  john = Person.newBuilder().setId(12345).setName.setEmail.addPhone(Person.PhoneNumber.newBuilder().setNumber("+351 999 999 999").setType(Person.PhoneType.HOME).build()).build();

    

7. Using objects

   // Writing data to a fileFileOutputStream  aOutput  = new FileOutputStream（"theFilename")Person  aPerson = Person.newBuilder.set()....   //instance  a PersonaPerson.writeTo(aOutput);aOutput.close();
   // Reading data from a filePerson  aPerson = Person.parseFrom(new FileInputStream("theFilename"))// Do something with the received Person

    

ProtoBuffer 重点在

1. Efficiency (space and time)   效率 （空间和时间）

2. Language interoperability     多语言互操作性
3. Usability                             方便使用

其它解决方案

1. Avro (http://avro.apache.org/)

2. Thrift (http://thrift.apache.org/)
3. Kryo (https://github.com/EsotericSoftware/kryo)

ProtoBuffer