@GetMapping("/hystrix/fallback")
    public ResultBean hystrixFallback() {
        ResultBean response = new ResultBean();
        response.setCode(429);
        response.setMsg("fallback");
        return response;
    }
fallback endpoint for hystrix plugin.

@return response. result bean
shenyu-examples/shenyu-examples-http-swagger3/src/main/java/org/apache/shenyu/examples/http/controller/HttpTestController.java