@GetMapping("/getParams")
    public String getParams(String a, String b) {
        System.out.println("a: " + a + " , b: " + b );

        return "get success";
    }

    private ExecutorService executorService = Executors.newFixedThreadPool(10);

    @PostMapping("/postTest")
    public String postTest(HttpServletRequest request, HttpServletResponse response, String age, String name) {
// ...