java – 从spring异常处理程序中读取httprequest内容

一些请求将POST数据保存为写入请求体的纯XML字符串,我想读取该数据以记录异常.
问题是当我在异常处理程序中请求输入流并尝试读取它时,流返回-1(空).

异常处理程序的签名是：

@ExceptionHandler(Throwable.class)
public ModelAndView exception(HttpServletRequest request,HttpServletResponse response,HttpSession session,Throwable arff)

有什么想法吗？有没有办法访问请求体？

我的控制器：

@Controller
@RequestMapping("/user/**")
public class UserController {

    static final Logger LOG = LoggerFactory.getLogger(UserController.class);

    @Autowired
    IUserService userService;


    @RequestMapping("/user")
    public ModelAndView getCurrent() {
        return new ModelAndView("user","response",userService.getCurrent());
    }

    @RequestMapping("/user/firstLogin")
    public ModelAndView firstLogin(HttpSession session) {
        userService.logUser(session.getId());
        userService.setOriginalAuthority();
        return new ModelAndView("user",userService.getCurrent());
    }


    @RequestMapping("/user/login/failure")
    public ModelAndView loginFailed() {
        LOG.debug("loginFailed()");
        Status status = new Status(-1,"Bad login");
        return new ModelAndView("/user/login/failure",status);
    }

    @RequestMapping("/user/login/unauthorized")
    public ModelAndView unauthorized() {
        LOG.debug("unauthorized()");
        Status status = new Status(-1,"Unauthorized.Please login first.");
        return new ModelAndView("/user/login/unauthorized",status);
    }

    @RequestMapping("/user/logout/success")
    public ModelAndView logoutSuccess() {
        LOG.debug("logout()");
        Status status = new Status(0,"Successful logout");
        return new ModelAndView("/user/logout/success",status);

    }

    @RequestMapping(value = "/user/{id}",method = RequestMethod.POST)
    public ModelAndView create(@RequestBody UserDTO userDTO,@PathVariable("id") Long id) {
        return new ModelAndView("user",userService.create(userDTO,id));
    }

    @RequestMapping(value = "/user/{id}",method = RequestMethod.GET)
    public ModelAndView getUserById(@PathVariable("id") Long id) {
        return new ModelAndView("user",userService.getUserById(id));
    }

    @RequestMapping(value = "/user/update/{id}",method = RequestMethod.POST)
    public ModelAndView update(@RequestBody UserDTO userDTO,userService.update(userDTO,id));
    }

    @RequestMapping(value = "/user/all",method = RequestMethod.GET)
    public ModelAndView list() {
        return new ModelAndView("user",userService.list());
    }

    @RequestMapping(value = "/user/allowedAccounts",method = RequestMethod.GET)
    public ModelAndView getAllowedAccounts() {
        return new ModelAndView("user",userService.getAllowedAccounts());
    }

    @RequestMapping(value = "/user/changeAccount/{accountId}",method = RequestMethod.GET)
    public ModelAndView changeAccount(@PathVariable("accountId") Long accountId) {
        Status st = userService.changeAccount(accountId);
        if (st.code != -1) {
            return getCurrent();
        }
        else {
            return new ModelAndView("user",st);
        }
    }
    /*
    @RequestMapping(value = "/user/logout",method = RequestMethod.GET)
    public void perLogout(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException {
        userService.setOriginalAuthority();
        response.sendRedirect("/marketplace/user/logout/spring");
    }
     */

    @ExceptionHandler(Throwable.class)
public ModelAndView exception(HttpServletRequest request,Throwable arff) {
    Status st = new Status();
    try {
        Writer writer = new StringWriter();
        byte[] buffer = new byte[1024];

        //Reader reader2 = new BufferedReader(new InputStreamReader(request.getInputStream()));
        InputStream reader = request.getInputStream();
        int n;
        while ((n = reader.read(buffer)) != -1) {
            writer.toString();

        }
        String retval = writer.toString();
        retval = "";
        } catch (IOException e) {

            e.printStackTrace();
        }

        return new ModelAndView("profile",st);
    }
}

谢谢