1, 下载compiler和源代码
http://code.google.com/p/protobuf/downloads/
build protobuf:
./configure
make
make check
make install
2, 创建一个addressbook.proto
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;
}
3, 生成C++的stub
protoc --cpp_out=. ./addressbook.proto
运行上面的命令将生成addressbook.pb.h和addressbook.pb.cc
4, 写
// write.cc
#include <iostream>
#include <fstream>
#include <string>
#include "addressbook.pb.h"
using namespace std;
void PromptForAddress(tutorial::Person* person) {
cout << "Enter person ID number: ";
int id;
cin >> id;
person->set_id(id);
cin.ignore(256, '\n');
cout << "Enter name: ";
getline(cin, *person->mutable_name());
cout << "Enter email address (blank for none): ";
string email;
getline(cin, email);
if (!email.empty()) {
person->set_email(email);
}
while(true) {
cout << "Enter a phone number (or leave blank to finish):";
string number;
getline(cin, number);
if (number.empty()) {
break;
}
tutorial::Person::PhoneNumber *phone_number = person->add_phone();
phone_number->set_number(number);
cout << "Is this a mobile, home, or work phone?";
string type;
getline(cin, type);
if (type == "mobile") {
phone_number->set_type(tutorial::Person::MOBILE);
} else if (type == "home") {
phone_number->set_type(tutorial::Person::HOME);
} else {
cout << "Unknown phone type. Using default." << endl;
}
}
}
int main(int argc, char* argv[]) {
GOOGLE_PROTOBUF_VERIFY_VERSION;
if(argc != 2) {
cerr << "Usage: " << argv[0] << " ADDRESS_BOOK_FILE" << endl;
return -1;
}
tutorial::AddressBook address_book;
{
fstream input(argv[1], ios::in | ios::binary);
if (!input) {
cout << argv[1] << ": File not found. Creating a new file." << endl;
} else if (!address_book.ParseFromIstream(&input)) {
cerr << "Failed to parse address book." << endl;
return -1;
}
}
PromptForAddress(address_book.add_person());
{
fstream output(argv[1], ios::out | ios::trunc | ios::binary);
if (!address_book.SerializeToOstream(&output)) {
cerr << "Failed to write address book." << endl;
return -1;
}
}
google::protobuf::ShutdownProtobufLibrary();
return 0;
}
编译生成write.exe
注意:
需要将protobuf的源码以及lib加到编译的PATH中
向文件写数据:
write ADDRESS_BOOK_FILE
Enter person ID number: 123
Enter name: Hideto
Enter email address (blank for none): hideto.bj@gmail.com
Enter a phone number (or leave blank to finish):159xxxxxxxx
Is this a mobile, home, or work phone?mobile
Enter a phone number (or leave blank to finish):
write ADDRESS_BOOK_FILE
// ....
5, 读
// read.cc
#include <iostream>
#include <fstream>
#include <string>
#include "addressbook.pb.h"
using namespace std;
void ListPeople(const tutorial::AddressBook& address_book) {
for (int i = 0; i < address_book.person_size(); i++) {
const tutorial::Person& person = address_book.person(i);
cout << "Person ID: " << person.id() << endl;
cout << "Name: " << person.name() << endl;
if(person.has_email()) {
cout << "E-mail address: " << person.email() << endl;
}
for (int j = 0; j < person.phone_size(); j++) {
const tutorial::Person::PhoneNumber& phone_number = person.phone(j);
switch (phone_number.type()) {
case tutorial::Person::MOBILE:
cout << "Mobile phone #: ";
break;
case tutorial::Person::HOME:
cout << "Home phone #: ";
break;
case tutorial::Person::WORK:
cout << "Work phone #: ";
break;
}
cout << phone_number.number() << endl;
}
}
}
int main(int argc, char* argv[]) {
GOOGLE_PROTOBUF_VERIFY_VERSION;
if (argc != 2) {
cerr << "Usage: " << argv[0] << "ADDRESS_BOOK_FILE" << endl;
return -1;
}
tutorial::AddressBook address_book;
{
fstream input(argv[1], ios::in | ios::binary);
if (!address_book.ParseFromIstream(&input)) {
cerr << "Failed to parse address book." << endl;
return -1;
}
}
ListPeople(address_book);
google::protobuf::ShutdownProtobufLibrary();
return 0;
}
编译生成read.exe
从文件读数据:
read ADDRESS_BOOK_FILE
// 以下为输出
Person ID: 123
Name: Hideto
E-mail address: hideto.bj@gmail.com
Mobile phone #: 159xxxxxxxx
Person ID: 456
Name: chuang
E-mail address: chuang@freewheel.tv
Home phone #: 22222222
Person ID: 1231231
Name: asdfadsf
E-mail address: fadsfdsf@dasfads.com
Mobile phone #: 12321321321
Home phone #: 123432432
6, Ruby的protobuf库
http://code.google.com/p/ruby-protobuf/
安装:
gem install ruby_protobuf
生成ruby的stub:
rprotoc addressbook.proto
从文件读数据:
# read.rb
require 'addressbook.pb.rb'
def list_people(address_book)
address_book.person.each do | p |
p "Person ID: #{p.id}"
p "Name: #{p.name}"
p "E-mail: #{p.email}" unless p.email.empty?
p.phone.each do |phone|
case phone.type
when Tutorial::Person::PhoneType::MOBILE
print "Mobile phone #: "
when Tutorial::Person::PhoneType::HOME
print "Home phone #: "
when Tutorial::Person::PhoneType::WORK
print "Work phone #: "
end
p phone.number
end
end
end
address_book = Tutorial::AddressBook.new
address_book.parse_from_file ARGV[0]
list_people address_book
运行:
ruby read.rb 'D:\cpp-projects\pb\bin\Release\ADDRESS_BOOK_FILE'
// 输出
"Person ID: 123"
"Name: Hideto"
"E-mail: hideto.bj@gmail.com"
Mobile phone #: "159xxxxxxxx"
"Person ID: 456"
"Name: chuang"
"E-mail: chuang@freewheel.tv"
Home phone #: "22222222"
"Person ID: 1231231"
"Name: asdfadsf"
"E-mail: fadsfdsf@dasfads.com"
Mobile phone #: "12321321321"
Home phone #: "123432432"
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