Spring MVC 4值传递

@RequestMapping(value = "/testRequestParam")
    public String testRequestParam(@RequestParam(value = "username") String un,
            @RequestParam(value = "age", required = false, defaultValue = "0") int age) {
        System.out.println("testRequestParam, username: " + un + ", age: " + age);
        return SUCCESS;
    }

@RequestMapping("/testRequestHeader")
    public String testRequestHeader(@RequestHeader(value = "Accept-Language") String al) {
        System.out.println("testRequestHeader, Accept-Language: " + al);
        return SUCCESS;
    }

@RequestMapping("/testCookieValue")
    public String testCookieValue(@CookieValue("JSESSIONID") String sessionId) {
        System.out.println("testCookieValue: sessionId: " + sessionId);
        return SUCCESS;
    }