以下是使用RapidJson将JSON内容格式化后写入文件的示例代码：
#include <iostream>
#include <fstream>
#include <string>
#include "rapidjson/document.h"
#include "rapidjson/prettywriter.h"
#include "rapidjson/writer.h"using namespace rapidjson;int main() {// 创建JSON文档Document doc;doc.SetObject();// 添加一些键值对Value name("John Doe");Value age(30);Value hobbies(kArrayType);hobbies.PushBack("Programming", doc.GetAllocator());hobbies.PushBack("Reading", doc.GetAllocator());hobbies.PushBack("Playing guitar", doc.GetAllocator());doc.AddMember("name", name, doc.GetAllocator());doc.AddMember("age", age, doc.GetAllocator());doc.AddMember("hobbies", hobbies, doc.GetAllocator());// 格式化JSON内容StringBuffer buffer;PrettyWriter<StringBuffer> writer(buffer);doc.Accept(writer);// 将JSON内容写入文件std::string filename = "example.json";std::ofstream ofs(filename);if (ofs.is_open()) {ofs << buffer.GetString();ofs.close();std::cout << "JSON content has been written to " << filename << std::endl;} else {std::cerr << "Failed to open file " << filename << std::endl;}return 0;
}
在上面的示例代码中，我们使用Document类创建了一个JSON文档，并使用AddMember()方法添加了几个键值对。然后，我们使用PrettyWriter类将JSON内容格式化为漂亮的字符串，并将其写入example.json文件中。你可以根据你的需要修改键值对的值，或者在JSON文档中添加、删除或修改键值对。
