上篇博文里我通过RapidJson解析了嵌套的json文本，那么本文章是RapidJson创建嵌套数组Json文本。

代码：

#include "rapidjson/document.h"

#include "rapidjson/writer.h"

#include "rapidjson/stringbuffer.h"

#include

using namespace rapidjson;

int main() {

// 1. Parse a JSON string into DOM.

const char* json ="{\"Info\":[{\"lots\":10,\"order_algorithm\":\"01\",\"buy_close\":9000,\"spread_shift\":0,\"position_b_sell\":0,\"position_a_buy_today\":0,\"position_a_buy_yesterday\":0,\"sell_open\":-9000,\"list_instrument_id\":[\"rb1705\",\"rb1701\"],\"position_b_buy_today\":0,\"buy_open\":-9000,\"position_a_sell_yesterday\":0,\"strategy_id\":\"02\",\"position_b_buy\":0,\"a_wait_price_tick\":1,\"trade_model\":\"boll_reversion\",\"b_wait_price_tick\":0,\"sell_close\":9000,\"only_close\":0,\"order_action_limit\":400,\"is_active\":1,\"lots_batch\":1,\"position_a_sell\":0,\"position_b_buy_yesterday\":0,\"user_id\":\"063802\",\"position_a_buy\":0,\"trader_id\":\"1601\",\"position_a_sell_today\":0,\"stop_loss\":0,\"position_b_sell_today\":0,\"position_b_sell_yesterday\":0,\"on_off\":0},{\"lots\":20,\"order_algorithm\":\"02\",\"buy_close\":9000,\"spread_shift\":0,\"position_b_sell\":0,\"position_a_buy_today\":0,\"position_a_buy_yesterday\":0,\"sell_open\":-9000,\"list_instrument_id\":[\"ni1705\",\"ni1701\"],\"position_b_buy_today\":0,\"buy_open\":-9000,\"position_a_sell_yesterday\":0,\"strategy_id\":\"01\",\"position_b_buy\":0,\"a_wait_price_tick\":1,\"trade_model\":\"boll_reversion\",\"b_wait_price_tick\":0,\"sell_close\":9000,\"only_close\":0,\"order_action_limit\":400,\"is_active\":1,\"lots_batch\":1,\"position_a_sell\":0,\"position_b_buy_yesterday\":0,\"user_id\":\"063802\",\"position_a_buy\":0,\"trader_id\":\"1601\",\"position_a_sell_today\":0,\"stop_loss\":0,\"position_b_sell_today\":0,\"position_b_sell_yesterday\":0,\"on_off\":0}],\"MsgSendFlag\":0,\"MsgErrorReason\":\"IDorpassworderror\",\"MsgRef\":1,\"MsgType\":3,\"MsgResult\":0}";

//std::cout << json << std::endl;

//std::cout << "\n" << std::endl;

std::cout << "|==================|" << std::endl;

std::cout << "||rapidjson output||" << std::endl;

std::cout << "|==================|" << std::endl;

Document doc;

doc.SetObject();

rapidjson::Document::AllocatorType& allocator = doc.GetAllocator();

doc.AddMember("MsgSendFlag", 1, allocator);

doc.AddMember("MsgErrorReason", "IDorpassworderror", allocator);

doc.AddMember("MsgRef", 1, allocator);

rapidjson::Value info_array(rapidjson::kArrayType);

for (int i = 0; i < 2; i++) {

rapidjson::Value info_object(rapidjson::kObjectType);

info_object.SetObject();

info_object.AddMember("lots", 10 + i, allocator);

info_object.AddMember("order_algorithm", "01", allocator);

rapidjson::Value instrument_array(rapidjson::kArrayType);

for (int j = 0; j < 2; j++) {

rapidjson::Value instrument_object(rapidjson::kObjectType);

instrument_object.SetObject();

instrument_object.SetString("cu1701");

instrument_array.PushBack(instrument_object, allocator);

}

info_object.AddMember("list_instrument_id", instrument_array, allocator);

info_array.PushBack(info_object, allocator);

}

doc.AddMember("Info", info_array, allocator);

// 3. Stringify the DOM

StringBuffer buffer;

Writer writer(buffer);

doc.Accept(writer);

std::cout << buffer.GetString() << std::endl;

return 0;

}

运行效果所创建的JSON文本为：

{

"MsgSendFlag": 1,

"MsgErrorReason": "IDorpassworderror",

"MsgRef": 1,

"Info": [

{

"lots": 10,

"order_algorithm": "01",

"list_instrument_id": [

"cu1701",

"cu1701"

]

},

{

"lots": 11,

"order_algorithm": "01",

"list_instrument_id": [

"cu1701",

"cu1701"

]

}

]

}

其JSON格式化视图如下：

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