简单的C++ JSON库:SimpleJSON

admin 7年前

SimpleJSON是一个轻量级的JSON库,用于在C++中从JSON格式导出数据。By taking advantage of templates and operator overloading on the backend, you're able to create and work with JSON objects right away, just as you would expect from a language such as JavaScript. SimpleJSON is packaged as a single C++ Header file "json.hpp".

Upcoming Features

SimpleJSON is still missing some features, which I hope to get done soon!

  • Import JSON from a string.
  • DONE Convert from a JSON object to primitive. Limited to String, Int, Float, and Bool.
  • DONE Allow users to assign to the next available any array index to append to the array:
  JSON array;    array[0] = "Value";    array[1] = 2;    array[2] = true;    array[4] = 1.1; // OK: Element 3 will be initialized to null.

One of the biggests goals for SimpleJSON is for it to be lightweight, and small. Having complicated logic isn't bad, but it bloats the codebase in most cases. I'd like to keep things small rather than put in big features that take a ton of space.

If you run into any bugs, please submit a bug!

Example

More examples can be found in the 'examples' directory. They're the closest thing to an API doc until I have time to write one.

#include "json.hpp"    int main() {    json::JSON obj;    // Create a new Array as a field of an Object.    obj["array"] = json::Array( true, "Two", 3, 4.0 );    // Create a new Object as a field of another Object.    obj["obj"] = json::Object();    // Assign to one of the inner object's fields    obj["obj"]["inner"] = "Inside";      // We don't need to specify the type of the JSON object:    obj["new"]["some"]["deep"]["key"] = "Value";    obj["array2"].append( false, "three" );      std::cout << obj << std::endl;  }

Output:

{    "array" : [true, "Two", 3, 4.000000],    "array2" : [false, "three"],    "new" : {      "some" : {        "deep" : {          "key" : "Value"        }      }    },    "obj" : {      "inner" : "Inside"    }  }

This example can also be written another way:

#include "json.hpp"  #include <iostream>    using json::JSON;    int main() {      JSON obj = {          "array", json::Array( true, "Two", 3, 4.0 ),          "obj", {              "inner", "Inside"          },          "new", {               "some", {                   "deep", {                       "key", "Value"                   }               }           },          "array2", json::Array( false, "three" )      };        std::cout << obj << std::endl;

项目主页:http://www.open-open.com/lib/view/home/1424572684697