Protocol Buffer Java Instance

We need to download the Protobuffer first, here:

Https://code.google.com/p/protobuf/downloads/list

Note that you need to download two, one is complier, the other is source code (i downloaded the 2.5 version);

complier corresponding Protoc.exe copy to source code corresponding to the./PROTOBUF-2.5.0/SRC Directory (mvn compilation required);

CD to./protobuf-2.5.0/java directory, perform mvn clean Package command packaging;

To the target directory to get the generated Protobuf-java-2.5.0.jar package (Java code to PROTOBUF dependent jar package);

Person.proto file

Package com.shine.pb;option Java_package="Com.shine.pb.person"; option Java_outer_classname="MyPerson"; message person {required Int32 ID= 1; Required String Name= 2; Optional String Email= 3; Enum Phonetype {MOBILE=0; FIXED= 1; } message Phoneinfo {Required String number= 1; Required Phonetype Type= 2 [default=MOBILE]; } Optional Phoneinfo phone= 4;}

To the directory where Protoc.exe is located, execute protoc--java_out=./output/java./messages/mymessage.proto

Can generate Java classes corresponding to the proto file;

Copy to your eclipse corresponding to SRC; Write the main method test, the code is as follows:

 PackageCom.shine.pb.person;Importcom.google.protobuf.InvalidProtocolBufferException;ImportCom.shine.pb.person.MyPerson.Person.PhoneType; Public classTest { Public Static voidMain (string[] args)throwsinvalidprotocolbufferexception {MyPerson.Person.Builder Builder=MyPerson.Person.newBuilder (); Builder.setid (1); Builder.setname ("Shine"); Builder.setemail ("[Email protected]"); MyPerson.Person.PhoneInfo.Builder Phoneinfobuilder=MyPerson.Person.PhoneInfo.newBuilder (); Phoneinfobuilder.setnumber ("13899999999");        Phoneinfobuilder.settype (Phonetype.mobile);                Builder.setphone (Phoneinfobuilder.build ()); Myperson.person Shine=Builder.build ();        System.out.println (Shine.getserializedsize ());        System.out.println (Shine.getemail ());        System.out.println (Shine.getname ());                System.out.println (Shine.getphone (). GetNumber ()); System.out.println ("============================================="); byte[] data =Shine.tobytearray (); Builder=MyPerson.Person.newBuilder (); Myperson.person Person=MyPerson.Person.parseFrom (data);        System.out.println (Person.getserializedsize ());        System.out.println (Person.getemail ());        System.out.println (Person.getname ());    System.out.println (Person.getphone (). GetNumber ()); }}

Protocol Buffer Java Instance