今天小编就为大家分享一篇关于C++中rapidjson将嵌套map转为嵌套json的讲解，小编觉得内容挺不错的，现在分享给大家，具有很好的参考价值，需要的朋友一起跟随小编来看看吧
rapidjson将嵌套map转为嵌套json——人生苦短，我用rapidjson
看代码：
#include #include <map> // 请自己下载开源的rapidjson #include "rapidjson/prettywriter.h" #include "rapidjson/rapidjson.h" #include "rapidjson/document.h" #include "rapidjson/stringbuffer.h" #include "rapidjson/writer.h" #include "rapidjson/memorystream.h" using namespace std; using rapidjson::Document; using rapidjson::StringBuffer; using rapidjson::Writer; using namespace rapidjson; string formJson(const map &mInt, const map &mString, const string &strChild, const map &mChildInt, const map &mChildString) { Document document; Document::AllocatorType& allocator = document.GetAllocator(); Value root(kObjectType); Value child(kObjectType); Value key(kStringType); Value value(kStringType); // 当前级别 for(map::const_iterator it = mInt.begin(); it != mInt.end(); ++it) { key.SetString(it->first.c_str(), allocator); root.AddMember(key, it->second, allocator); } for(map::const_iterator it = mString.begin(); it != mString.end(); ++it) { key.SetString(it->first.c_str(), allocator); value.SetString(it->second.c_str(), allocator); root.AddMember(key, value, allocator); } // 孩子级别 if(!strChild.empty()) { for(map::const_iterator it = mChildInt.begin(); it != mChildInt.end(); ++it) { key.SetString(it->first.c_str(), allocator); child.AddMember(key, it->second, allocator); } for(map::const_iterator it = mChildString.begin(); it != mChildString.end(); ++it) { key.SetString(it->first.c_str(), allocator); value.SetString(it->second.c_str(), allocator); child.AddMember(key, value, allocator); } key.SetString(strChild.c_str(), allocator); root.AddMember(key, child, allocator); } StringBuffer buffer; Writer writer(buffer); root.Accept(writer); return buffer.GetString(); } int main(int argc, char *argv[]) { map mInt; mInt["code"] = 0; mInt["score"] = 80; map mString; mString["name"] = "taoge"; mString["place"] = "shenzhen"; string strChild = "childNode"; map mChildInt; mChildInt["code"] = 0; mChildInt["score"] = 100; map mChildString; mChildString["name"] = "taogeChild"; mChildString["place"] = "shenzhen"; string strJson = formJson(mInt, mString, strChild, mChildInt, mChildString); cout << strJson << endl; return 0; }
结果：
{“code”:0,”score”:80,”name”:”taoge”,”place”:”shenzhen”,”childNode”:{“code”:0,”score”:100,”name”:”taogeChild”,”place”:”shenzhen”}}
另外， 如果仅仅想有当前界别， 那么， 可以这么搞（C++默认参数搞起）：
#include #include <map> // 请自己下载开源的rapidjson #include "rapidjson/prettywriter.h" #include "rapidjson/rapidjson.h" #include "rapidjson/document.h" #include "rapidjson/stringbuffer.h" #include "rapidjson/writer.h" #include "rapidjson/memorystream.h" using namespace std; using rapidjson::Document; using rapidjson::StringBuffer; using rapidjson::Writer; using namespace rapidjson; map g_mChildInt; map g_mChildString; string formJson(const map &mInt, const map &mString, const string &strChild="", const map &mChildInt=g_mChildInt, const map &mChildString=g_mC<strong style="color:transparent">来源gao@daima#com搞(%代@#码网</strong>hildString) { Document document; Document::AllocatorType& allocator = document.GetAllocator(); Value root(kObjectType); Value child(kObjectType); Value key(kStringType); Value value(kStringType); // 当前级别 for(map::const_iterator it = mInt.begin(); it != mInt.end(); ++it) { key.SetString(it->first.c_str(), allocator); root.AddMember(key, it->second, allocator); } for(map::const_iterator it = mString.begin(); it != mString.end(); ++it) { key.SetString(it->first.c_str(), allocator); value.SetString(it->second.c_str(), allocator); root.AddMember(key, value, allocator); } // 孩子级别 if(!strChild.empty()) { for(map::const_iterator it = mChildInt.begin(); it != mChildInt.end(); ++it) { key.SetString(it->first.c_str(), allocator); child.AddMember(key, it->second, allocator); } for(map::const_iterator it = mChildString.begin(); it != mChildString.end(); ++it) { key.SetString(it->first.c_str(), allocator); value.SetString(it->second.c_str(), allocator); child.AddMember(key, value, allocator); } key.SetString(strChild.c_str(), allocator); root.AddMember(key, child, allocator); } StringBuffer buffer; Writer writer(buffer); root.Accept(writer); return buffer.GetString(); } int main(int argc, char *argv[]) { map mInt; mInt["code"] = 0; mInt["score"] = 80; map mString; mString["name"] = "taoge"; mString["place"] = "shenzhen"; string strJson = formJson(mInt, mString); cout << strJson << endl; return 0; }
结果：
{“code”:0,”score”:80,”name”:”taoge”,”place”:”shenzhen”}
其实， 上面的formJson函数， 还可以继续扩展。
总结
以上就是C++中rapidjson将嵌套map转为嵌套json的讲解的详细内容，更多请关注gaodaima搞代码网其它相关文章！
搞代码网（gaodaima.com）提供的所有资源部分来自互联网，如果有侵犯您的版权或其他权益，请说明详细缘由并提供版权或权益证明然后发送到邮箱[email protected]，我们会在看到邮件的第一时间内为您处理，或直接联系QQ：872152909。本网站采用BY-NC-SA协议进行授权
转载请注明原文链接：C++中rapidjson将嵌套map转为嵌套json的讲解
转载请注明原文链接：C++中rapidjson将嵌套map转为嵌套json的讲解
