// json 代码
{

        /*用户信息*/

        user: {

            username: '{$user.username}',

            headImg: '{$user.headImg}',

            targetId: '{$user.targetId}',

            openid: '{$user.openid}'

        },

        /* 产品信息 */

        productUrl: '',

        productImg: '',

        productPrice: ''

    }

class ConnController {

    /**

     * 普通用户初始连接时请求。

     */

    class UserInitReq {

        var user: User = User()

    }

    @Autowired

    lateinit var connService: ConnService

    @PostMapping("/userToKfConn")

    @ResponseBody

    fun userToKfConn(@RequestBody userInitReq: UserInitReq,

                     req: HttpServletRequest,

                     resp: HttpServletResponse): Map<String, Any?> {

        return connService.handlerUserToKfConn(req, resp, userInitReq.user)

    }

}