java - 在servlet中添加cookie报错

问题描述

问 题

1.在添加cookie的时候报错：

An invalid character [13] was present in the Cookie value

1. 在网上查了一些报错，大部分都是[32]、[44]，据说是因为cookie里面添加了,或者空格导致的。

2. 登陆处理的代码是这样的：

//登录处理
    @RequestMapping(value = "/login/validate", method = RequestMethod.POST)
    public void Validate(@RequestParam("username") String username, @RequestParam("password") String password,
                         HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) {
        String md5 = MD5Util.stringToMD5(password);
        if (userService.verification(username, md5)) {
            User user = userService.selectByUsername(username);
            Long id = user.getId();
            Long createDate = new Date().getTime();
            String str = id + "=" + createDate;
            //加密
            byte[] result = DESUtil.desCrypto(str, "12345678");

            //把加密的字节数组转换成16进制
//            String results = TypeUtil.bytesToHexString(result);
            String results = Base64.encodeBase64String(result);

            Cookie cookie = new Cookie("token", results);
            cookie.setMaxAge(60 * 60 * 24 * 7);//7天
            cookie.setPath("/");
            System.out.println("新生成cookie和其MaxAge：" + cookie.getName() + "-->" + cookie.getMaxAge());
            httpServletResponse.addCookie(cookie);
            HttpSession session = httpServletRequest.getSession();
            session.setAttribute("user", user);
            for (Cookie c : httpServletRequest.getCookies()) {
                System.out.println("cookes添加到response后重新获取cookies和其MaxAge：" + c.getName() + "-->" + c.getMaxAge());
            }
            try {
                httpServletResponse.sendRedirect("/index.html");
//                httpServletRequest.getRequestDispatcher("/index.html").forward(httpServletRequest, httpServletResponse);
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else {
            try {
                httpServletResponse.sendRedirect("no.html");
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

报错的地方发生在addCookie这里。

解决方案

经过尝试，把原来的代码2注释，1 放开就可以了，哪位大佬可以解释一下啊

1. String results = TypeUtil.bytesToHexString(result);
2. //String results = Base64.encodeBase64String(result);

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