原始字符串使用方法 R"( )",括号在引号里面
string str11 = R"( {"params": {"type": "ZXHN E3630-0000","version": "V1.0.0.3B2.0000",},"jsonrpc": "2.0","id": "2","method": "PullUpgrade"} )";
nlohmann/json
