Json序列化(编组和解组)

本文介绍了Json序列化(编组和解组)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我需要一些示例，说明如何从Json格式序列化/反序列化到Object以及从Object序列化/反序列化.我使用了以下示例www.boost/doc/libs/1_47_0/libs/serialization/doc/index.html，但它仅序列化为简单文本.在我的项目中，出于其他要求，我正在成功使用Boost库.我几乎可以确定我确实需要其他一些特定的库，例如Json-Spirit或标准QT库(QScriptEngine).任何简单的示例将不胜感激. 这是我必须序列化为类的Json文件的示例.

I need some example of how to serialize/deserilize from Json format to Object and from Object to Json. I used this example www.boost/doc/libs/1_47_0/libs/serialization/doc/index.html, but it only serialize to a simple text. In my project, for other requirenments, I am using boost library with success. I am almost sure that I do need some other specific library like Json-Spirit or standard QT library (QScriptEngine). Any simple example will be very appreciate. This is an example of the Json files I must serialized to a class.

[{"DscTipoEstrutura":"Unidade de Neg\u00f3cio","FlgAtivo":true,"IdDominio":1,"IdTipoEstrutura":1,"NroOrdem":0},{"DscTipoEstrutura":"Regi\u00e3o","FlgAtivo":true,"IdDominio":1,"IdTipoEstrutura":2,"NroOrdem":1},{"DscTipoEstrutura":"Distrito","FlgAtivo":true,"IdDominio":1,"IdTipoEstrutura":3,"NroOrdem":2}]

附注:我发现www.codeproject/KB/recipes/JSON_Spirit.aspx和boost-spirit/repository/applications/show_contents.php与我类似，但因为我是C ++更好的是，我不明白他们几个小时后都无法运行该示例.我需要一些简单的示例.

Ps.: I found www.codeproject/KB/recipes/JSON_Spirit.aspx and boost-spirit/repository/applications/show_contents.php similiar to I need but, because I am C++ begnnier, I couldn''t understand them neither run the example after some couple of hours. I need some simple example.

推荐答案

大家好， 我已经使用了CodeProject教程来提供解决方案，因此您应该首先从以下地址下载与该教程相关联的代码: www.codeproject/KB/recipes/JSON_Spirit.aspx 然后，您可以非常快速地将其适应您的项目(由于使用了教程) 您将获得此解决方案. Hi guys, I have used a CodeProject tutorial to bring a solution so you should download the code associated to the tutorial first at this adress: www.codeproject/KB/recipes/JSON_Spirit.aspx Then you can adapt it to your project quite rapidly (thanks to the tutorial) and you get this solution. #include "json_spirit.h" #include <cassert> #include <fstream> #ifndef JSON_SPIRIT_VALUE_ENABLED #error Please define JSON_SPIRIT_VALUE_ENABLED for the Value type to be enabled #endif using namespace std; using namespace json_spirit; struct Address { string DscTipoEstrutura_; bool FlgAtivo_; int IdDominio_; int IdTipoEstrutura_; int NroOrdem_; }; bool operator==( const Address& a1, const Address& a2 ) { return ( a1.DscTipoEstrutura_ == a2.DscTipoEstrutura_ ) && ( a1.FlgAtivo_ == a2.FlgAtivo_ ) && ( a1.IdDominio_ == a2.IdDominio_ ) && ( a1.IdTipoEstrutura_ == a2.IdTipoEstrutura_ ) && ( a1.NroOrdem_ == a2.NroOrdem_ ); } void write_address( Array& a, const Address& addr ) { Object addr_obj; addr_obj.push_back( Pair( "DscTipoEstrutura", addr.DscTipoEstrutura_ ) ); addr_obj.push_back( Pair( "FlgAtivo", addr.FlgAtivo_ ) ); addr_obj.push_back( Pair( "IdDominio", addr.IdDominio_ ) ); addr_obj.push_back( Pair( "IdTipoEstrutura", addr.IdTipoEstrutura_ ) ); addr_obj.push_back( Pair( "NroOrdem", addr.NroOrdem_ ) ); a.push_back( addr_obj ); } Address read_address( const Object& obj ) { Address addr; string strBool; for( Object::size_type i = 0; i != obj.size(); ++i ) { const Pair& pair = obj[i]; const string& name = pair.name_; const Value& value = pair.value_; if( name == "DscTipoEstrutura" ) { addr.DscTipoEstrutura_ = value.get_str(); } else if( name == "FlgAtivo" ) { addr.FlgAtivo_ = value.get_bool();;//to be changed } else if( name == "IdDominio" ) { addr.IdDominio_ = value.get_int(); } else if( name == "IdTipoEstrutura" ) { addr.IdTipoEstrutura_ = value.get_int(); } else if( name == "NroOrdem" ) { addr.NroOrdem_ = value.get_int(); } else { assert( false ); } } return addr; } void write_addrs( const char* file_name, const Address addrs[] ) { Array addr_array; for( int i = 0; i < 5; ++i ) { write_address( addr_array, addrs[i] ); } ofstream os( file_name ); write_formatted( addr_array, os ); os.close(); } vector< Address > read_addrs( const char* file_name ) { ifstream is( file_name ); Value value; read( is, value ); const Array& addr_array = value.get_array(); vector< Address > addrs; for( unsigned int i = 0; i < addr_array.size(); ++i ) { addrs.push_back( read_address( addr_array[i].get_obj() ) ); } return addrs; } int main() { const Address addrs[5] = { { "Unidade de Neg\u00f3cio", "true", 1, 1, 0 }, { "Regi\u00e3o", "true", 1, 2 ,1 }, { "Distrito", "true", 1, 3,2 }, { "jkl", "false", 3, 3, 2 }, { "mno", "false", 2, 4, 2 } }; const char* file_name( "demo.txt" ); write_addrs( file_name, addrs );//de la représentation tabulée au JSON vector< Address > new_addrs = read_addrs( file_name );//du JSON à la représentation tabulée assert( new_addrs.size() == 5 ); for( int i = 0; i < 5; ++i ) { assert( new_addrs[i] == addrs[i] ); } return 0; } </fstream></cassert>

希望它能对您有所帮助，或者告诉您解决方案不是您期望的那样. 来自法国， 加布里埃尔

Hope it helps and tell me if you have problems or if the solution is not what you expected. By from France, Gabriel