Cocos2d-x Json读写

一、Json读取
1. 读文件字符串
std::string data = FileUtils::getInstance()->getStringFromFile("test2.json");@H_301_17@ 
 2.解析字符串 
 Json::Reader reader;
Json::Value root;
reader.parse(data,root,false);@H_301_17@ 
 3.访问内容 
 log("id=%d",root["id"].asInt());
log("name=%s",root["name"].asCString());
log("IQ=%f",root["IQ"].asDouble());
log("msg value money=%d",root["msg"]["money"].asInt());
log("msg value say=%s",root["msg"]["say"].asCString());@H_301_17@ 
 示例： 
 test2.json： 
  
  { 
 “id”:1,
 “name”:”mutou”,
 “IQ”:99.5,
 “msg”:{ “money”:999999,“say”:”hehe” } 
 }  
  
 代码： 
 void HelloWorld::readChildJson()
{
    Json::Reader reader;
    Json::Value root;

    std::string data = FileUtils::getInstance()->getStringFromFile("test2.json");

    if (reader.parse(data,false) == true)
    {
        log("id=%d",root["id"].asInt());
        log("name=%s",root["name"].asCString());
        log("IQ=%f",root["IQ"].asDouble());

        log("msg value money=%d",root["msg"]["money"].asInt());
        log("msg value say=%s",root["msg"]["say"].asCString());
    }
}@H_301_17@ 
 二、Json写入 
 1.写内容 
 Json::Value root;
root["name"] = "Who";
root["IQ"] = 999;@H_301_17@ 
 2.生成Json字符串 
 Json::FastWriter writer;
std::string json_file = writer.write(root);@H_301_17@ 
 3.写入文件 
 FILE* file = fopen("testWirte.json","w");
fprintf(file,json_file.c_str());
fclose(file);@H_301_17@ 
 示例： 
 void HelloWorld::writeJson()
{

    Json::Value root;
    Json::FastWriter writer;

    root["name"] = "Who";
    root["IQ"] = 999;

    std::string json_file = writer.write(root);

    FILE* file = fopen("testWirte.json","w");
    fprintf(file,json_file.c_str());
    fclose(file);
}@H_301_17@
Cocos2d-x Json读写

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