简单的Cookie设置和读取操作

1、登录时设置Cookie，返回给前端浏览器

    @PostMapping(value = "/login")
    public BaseResponse createAuthenticationToken(@RequestBody GovJwtRequest authRequest, HttpServletResponse response) throws UnsupportedEncodingException {
        GovJwtResponse jwtResponse = authService.createAuthToken(authRequest);
        //这里设置cookie
        CookiesUtils.setCookies(response, BaseConstant.AUTH_JWT, jwtResponse.getJwtToken(), BaseConstant.JWT_TOKEN_VALIDITY);
        return BaseResponse.with(Code.SUCCESS, jwtResponse);
    }

2、可以从请求中获取Cookie，拦截器或者接口中获取都ok

aString = CookiesUtils.getValue(request, BaseConstant.AUTH_JWT);

3、CookieUtil实现

public class CookiesUtils {

    /**
     * 设置cookie
     *
     * @param response
     * @param name
     * @param value
     * @param expired  有效时间(s)
     */
    public static void setCookies(HttpServletResponse response, String name, String value, int expired)
            throws UnsupportedEncodingException {
        value = URLEncoder.encode(value, "utf-8");
        Cookie cookies = new Cookie(name, value);
        cookies.setMaxAge(expired);
        cookies.setPath("/");
        response.addCookie(cookies);
    }

    /**
     * 设置cookie
     *
     * @param response
     * @param name
     * @param value
     */
    public static void setCookies(HttpServletResponse response, String name, String value) {
        try {
            value = URLEncoder.encode(value, "utf-8");
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
        Cookie cookies = new Cookie(name, value);
        cookies.setPath("/");
        response.addCookie(cookies);
    }

    public static void deleteCookie(HttpServletResponse response, String key) {
        Cookie cookie = new Cookie(key, "");
        cookie.setMaxAge(0);
        cookie.setPath("/");
        response.addCookie(cookie);
    }

    /**
     * 获得cookie
     *
     * @param request
     * @param name
     * @return
     */
    public static String getValue(HttpServletRequest request, String name) throws UnsupportedEncodingException {
        Cookie[] cookies = request.getCookies();
        if (cookies == null || cookies.length == 0) {
            return null;
        }
        for (Cookie cookie : cookies) {
            if (Objects.equals(cookie.getName(), name)) {
                return URLDecoder.decode(cookie.getValue(), "utf-8");
            }
        }
        return null;
    }

4、其他
开发时出现过返回Cookie顺利，但是浏览器中并无该Cookie的情况，原因是前端某个库吞掉了Cookie，注意避坑。