Json::Reader reader;//读文件 Json::Value root; std::string data = FileUtils::getInstance()->getStringFromFile("1111testWirte.json"); if (reader.parse(data,root,false) == true) { log("id=%d",root["id"].asInt()); log("name=%s",root["name"].asCString()); log("IQ=%f",root["IQ"].asDouble()); root["id"] = 10;//修改的内容 } Json::FastWriter writer;//写文件 std::string json_file = writer.write(root); FILE* file = fopen("1111testWirte.json","w"); fprintf(file,json_file.c_str()); fclose(file);