google protocol buffer试用

从http://code.google.com/p/protobuf/上下载protobuf-2.3.0，解压后，打开vsprojects文件夹，然后用VS2005打开protobuf开始编译，然后生成libprotobuf,libprotobuf-lite,libprotoc三个lib，同时生成了include文件夹。。。具体操作看vsprojects下面的readme文件来看。。。。

之后新建一个记事本txt文件（book.txt）在里面写

package tutorial;
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;
}

然后在dos命令行下对该文件进行重命名:rename book.txt book.proto，然后在dos命令行下protoc.exe -I=. --cpp_out=. book.proto，就可以生成两个文件book.pb.cpp, book.pb.h。

代码：（转载）

void PromptForAddress(tutorial::Person* person);
void ListPeople(const tutorial::AddressBook& addressbook);

int AddPerson();
int ViewPerson();

int main()
{

 AddPerson();
 ViewPerson();
 return 0;
}

void PromptForAddress(tutorial::Person* person)
{
 std::cout <<"Enter person ID number: ";
 int id;
 std::cin>> id;
 person->set_id(id);
 std::cin.ignore(256, '/n');

 std::cout <<"Enter name: ";
 std::getline(std::cin, *person->mutable_name());

 std::cout <<"Enter email address (blank for none): ";
 std::string email;
 std::getline(std::cin, email);
 if (!email.empty())
  person->set_email(email);

 while (true)
 {
  std::cout <<"Enter a phone number (or leave blank to finish): ";
  std::string number;
  std::getline(std::cin, number);
  if (number.empty())
   break;

  tutorial::Person::PhoneNumber* phonenum = person->add_phone();
  phonenum->set_number(number);

  std::cout <<"Is it a mobile, home or work phone? ";
  std::string type;
  std::getline(std::cin, type);
  if ("mobile" == type)
   phonenum->set_type(tutorial::Person::MOBILE);
  else if ("home" == type)
   phonenum->set_type(tutorial::Person::HOME);
  else if ("work" == type)
   phonenum->set_type(tutorial::Person::WORK);
  else
   std::cout <<"Unknown phone type. Using default." <<std::endl;
 }
}

void ListPeople(const tutorial::AddressBook& addressbook)
{
 for (int i = 0; i <addressbook.person_size(); i++)
 {
  const tutorial::Person& person = addressbook.person(i);
  std::cout <<"Person ID: " <<person.id() <<std::endl;
  std::cout <<"Name: " <<person.name() <<std::endl;
  if (person.has_email())
   std::cout <<"Email: " <<person.email() <<std::endl;

  for (int j = 0; j <person.phone_size(); j++)
  {
   const tutorial::Person::PhoneNumber& phonenum = person.phone(j);
   switch (phonenum.type())
   {
   case tutorial::Person::MOBILE:
    std::cout <<"Mobile phone #: ";
    break;
   case tutorial::Person::HOME:
    std::cout <<"Home phone #: ";
    break;
   case tutorial::Person::WORK:
    std::cout <<"Work phone #: ";
    break;
   }
   std::cout <<phonenum.number() <<std::endl;
  }
 }
}

int AddPerson()
{
 tutorial::AddressBook addressbook;
 const std::string& filename = "addressbook";
 std::fstream input(filename.c_str(), ios::in | ios::binary);
 if (!input)
  std::cout <<filename <<": File not found. Creating a new file." <<std::endl;
 else if (!addressbook.ParseFromIstream(&input))
 {
  std::cerr <<"Failed to parse address book." <<std::endl;
  return -1;
 }
 PromptForAddress(addressbook.add_person());
 std::fstream output(filename.c_str(), ios::out | ios::trunc | ios::binary);
 if (!addressbook.SerializeToOstream(&output))
 {
  std::cerr <<"Failed to write address book." <<std::endl;
  return -1;
 }
 return 0;
}

int ViewPerson()
{
 tutorial::AddressBook addressbook;
 const std::string& filename = "addressbook";
 std::fstream input(filename.c_str(), ios::in | ios::binary);
 if (!addressbook.ParseFromIstream(&input))
 {
  std::cerr <<"Failed to parse address book." <<std::endl;
  return -1;
 }
 ListPeople(addressbook);
 return 0;
}

注意：编译库的时候是使用的debug非release。。。

把工程设置成：C C++；代码生成；多线程DLL（/MD）才行。