或ServletResponse
執行不執行HttpServletResponse
?有沒有實現HttpServletRequest的ServletRequest實現?
UPDATE
難道我總是需要檢測它們在Filter
?例如
@Override
public void doFilter(ServletRequest req, ServletResponse resp) throws IOException, ServletException {
if (!(req instanceof HttpServletRequest) || !(resp instanceof HttpServletResponse)) {
// Unexpected
...
}
}
爲什麼你想要? – Ravi
只有當你沒有擴展'HttpServlet'。可能還有其他種類,比如'FTPServlet.' – EJP