java web(spring mvc) 獲取請求host 和 如何獲取靜態頁的相對路徑

1.獲取請求host

StringBuffer url = request.getRequestURL();
String tempContextUrl = url.delete(url.length() - request.getRequestURI().length(), url.length()).toString();

2.獲取靜態頁的相對路徑

String path=request.getSession().getServletContext().getRealPath("相對路徑");