使用servlet原生API作为参数（9）

<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>3.1.0</version>
  <scope>provided</scope>
</dependency>

 /**
     * 可以使用Servlet 原生的API作为目标方法的参数 具体支持以下类型： 
     * HttpServletRequest
     * HttpServletResponse
     * HttpSession
     * java.secutiy.Principal
     * Locale InputStream
     * OutputStram
     * Reader
     * writer
     * @param request
     * @param response
     * @param out
     * @throws IOException
     */
    @RequestMapping("/testServletAPI")
    public void testServletAPI(HttpServletRequest request, HttpServletResponse response, Writer out) throws IOException {
        System.out.println("testServletAPI, " + request + ", " + response);
        out.write("hello springmvc");
//        return "success";
    }