springboot封装JsonUtil,CookieUtil工具类代码实例

public class JsonUtil {  private static ObjectMapper objectMapper = new ObjectMapper();  public static String objectToString(Object object) throws JsonProcessingException {    return objectMapper.writeValueAsString(object);  }  public static <T> T stringToObject(String json,Class<T> object) throws IOException {    return objectMapper.readValue(json,object);  }}

public class CookieUtil {  public static String getCookie(HttpServletRequest request, String cookieName){    Cookie[] cookies = request.getCookies();    if(cookies != null){      for(Cookie cookie : cookies){        if(cookie.getName().equals(cookieName)){          return cookie.getValue();        }      }    }    return null;  }  public static void setCookie(HttpServletResponse response, String cookieName, String value,int cookieMaxAge){    Cookie cookie = new Cookie(cookieName,value);    cookie.setPath("/");    cookie.setMaxAge(cookieMaxAge);    response.addCookie(cookie);  }  public static void deleteCookie(HttpServletResponse response, String cookieName){    setCookie(response,cookieName,null,0);  }}