一、 

vi json_test.cpp 

#include
  2 #include
  3 #include
  4 using namespace std;
  5
  6 void Seralize()
  7 {
  8   const char*name="张三";
  9   int age=18;
 10   float score[]={88.5,99,45};
 11
 12   Json::Value val;
 13   val["姓名"]=name;
 14   val["年龄"]=age;
 15   val["成绩"].append(score[0]);
 16   val["成绩"].append(score[1]);
 17   val["成绩"].append(score[2]);
 18
 19   Json::Value root;
 20   root.append(val);
 21
 22   Json::FastWriter writer;
 23   string str=writer.write(root);
 24   cout<
 25
 26 }
 27
 28
 29 void UnSeralize()
 30 {
 31   string str=R"({"姓名":"李四","年龄":19,"成绩":[66,87.5,99]})";
 32   cout<
 33   Json::Reader reader;
 34   Json::Value val;
 35   bool ret= reader.parse(str,val);
 36   if(ret==false)
 37   {
 38    cout<<"json parse error\n";
 39    return;
 40   }
 41
 42  cout<"姓名"].asString()<
 43  cout<"年龄"].asInt()<
 44  if(val["成绩"].isArray())
 45  {
 46   int sz=val["成绩"].size();
 47   for(int i=0;i
 48   {
 49     cout<"成绩"][i].asFloat()<
 50   }
 51  }
 52 return;
 53 }
 54
 55
 56
 57 int main()
 58 {
 59
 60   Seralize();
 61   UnSeralize();
 62   return 0;
 63
 64 }
 

vi makefile

 http_sever:http_sever.cpp
     g++ -g -std=c++11 $^ -o $@ -lpthread
  
 json_test:json_test.cpp
     g++ -std=c++11 $^ -o $@ -ljsoncpp

 结果如下：

 二、

vi http_sever.cpp

 
  1 #include "httplib.h"
  2 using namespace std;
  3 void HelloWord(const httplib::Request &req,httplib::Response &rsp)
  4 {
  5   rsp.body="hello bit!!!123456";
  6   rsp.status=200;
  7   return;
  8 }
  9
 10 void Numbers(const httplib::Request &req,httplib::Response &rsp)
 11 {
 12   string num=req.matches[1];
 13   rsp.body=num;
 14   rsp.status=200;
 15 }
 16
 17 void Dish(const httplib::Request &req,httplib::Response &rsp)
 18 {
 19   rsp.body=req.body;
 20   rsp.status=200;
 21 }
 22
 23 int main()
 24 {
 25   httplib::Server srv;
 26  srv.set_mount_point("/","./wwwroot");
 27
 28  srv.Get("/hi",HelloWord);
 29  srv.Get(R"(numbers/(d+))",Numbers);
 30  srv.Post("/dish",Dish);
 31  srv.listen("0.0.0.0",19000);
 32  return 0;
 33 }

index.html

  1 
  2   
  3       "UTF-8"/>
  4   
  5   
  6       
语文数学英语
  7   
  8 

 目录结构：

浏览器输入192.168.164.137:19000/hi，页面显示hello bit!!!123456,如下图所示： 

 浏览器输入192.168.164.137:19000/numbers，页面显示123456,如下图所示：

 浏览器输入192.168.164.137:19000/index.html，页面显示语文数学英语,如下图所示：