``` /** * @author 張躍帥 * @Description: HttpServlet獲取當前request和response-工具 * @date 2020/08/12 */ public class HttpServletUtil { /** * 獲取當前請求的request對象 */ public static HttpServletRequest getRequest() { // 獲取請求屬性 ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes(); // 判斷 if (null == requestAttributes) { // 拋出異常 throw new MyException(CommonExceptionEnum.ERROR_400.getCode(), "當前請求參數為空或數據缺失，請檢查"); } else { // 返回 return requestAttributes.getRequest(); } } /** * 獲取當前請求的response對象 */ public static HttpServletResponse getResponse() { // 獲取請求屬性 ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes(); // 判斷 if (null == requestAttributes) { // 拋出異常 throw new MyException(CommonExceptionEnum.ERROR_400.getCode(), "當前請求參數為空或數據缺失，請檢查"); } else { // 返回 return requestAttributes.getResponse(); } } /** * 獲取-請求參數key的值 */ public static String getReqParamKeyOfVal(String paramKey) { // 獲取當前請求的request對象 HttpServletRequest request = getRequest(); // 從請求體里面讀取 String paramVal = request.getParameter(paramKey); // 判斷 if (StrUtil.isBlank(paramVal)) { // 從header里讀取 paramVal = request.getHeader(paramKey); } // 判斷 if (StrUtil.isBlank(paramVal)) { // 從cookie里讀取 Cookie[] cookies = request.getCookies(); // 判斷 if (ObjectUtil.isNotEmpty(cookies)) { // 遍歷 for (Cookie cookie : cookies) { // 獲取參數 String cookieName = cookie.getName(); // 判斷 if (cookieName.equals(cookieName)) { // 返回 return cookie.getValue(); } } } } // 返回 return paramVal; } }