//获取全局的Request/Response对象
$request = Context::mustGet()->getRequest();
$response = Context::mustGet()->getResponse();

//设置返回格式 默认 UTF-8
$response->withContentType('application/json');

//返回JSON格式
$response->withData($arr); //$arr为数组 自动转换

//对url参数正则验证
@RequestMapping(route="/detail/{id}",params={"id="\d+""},method={RequestMethod::GET})

//中间件

//JSON参数的获取