rapidjson将map转为json------人生苦短，我用rapidjson

来源：互联网发布：写java用什么eclipse 编辑：程序博客网时间：2024/06/07 07:30

直接撸代码：

#include <iostream>#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 test(const map<string, string> &m)   // 注意这里的const{    Document document;      Document::AllocatorType& allocator = document.GetAllocator();     Value root(kObjectType);      Value key(kStringType);      Value value(kStringType); for(map<string, string>::const_iterator it = m.begin(); it != m.end(); ++it)  // 注意这里要用const_iterator{key.SetString(it->first.c_str(), allocator);     value.SetString(it->second.c_str(), allocator);      root.AddMember(key, value, allocator);}    StringBuffer buffer;      Writer<StringBuffer> writer(buffer);      root.Accept(writer);      return buffer.GetString();  }  int main(int argc, char *argv[]){map<string, string> m;m["name"] = "taoge";m["place"] = "shenzhen";cout << test(m) << endl;return 0;}

结果： {"name":"taoge","place":"shenzhen"}

来，继续改：

#include <iostream>#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 test(const map<string, int> &mInt, const map<string, string> &mString)   // 注意这里的const{    Document document;      Document::AllocatorType& allocator = document.GetAllocator();     Value root(kObjectType);      Value key(kStringType);      Value value(kStringType); for(map<string, int>::const_iterator it = mInt.begin(); it != mInt.end(); ++it)  // 注意这里要用const_iterator{key.SetString(it->first.c_str(), allocator);      root.AddMember(key, it->second, allocator);}for(map<string, string>::const_iterator it = mString.begin(); it != mString.end(); ++it)  // 注意这里要用const_iterator{key.SetString(it->first.c_str(), allocator);     value.SetString(it->second.c_str(), allocator);      root.AddMember(key, value, allocator);}    StringBuffer buffer;      Writer<StringBuffer> writer(buffer);      root.Accept(writer);      return buffer.GetString();  }  int main(int argc, char *argv[]){map<string, int> mInt;mInt["age"] = 29;mInt["score"] = 80;map<string, string> mString;mString["name"] = "taoge";mString["place"] = "shenzhen";cout << test(mInt, mString) << endl;return 0;}

结果：{"age":29,"score":80,"name":"taoge","place":"shenzhen"}

不多说。

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