public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
((HttpServletResponse) response).setHeader("Pragma", "No-cache");
((HttpServletResponse) response).setHeader("Cache-Control", "no-cache");
((HttpServletResponse) response).setHeader("Expires", "0");
chain.doFilter(request, response);
}
麻烦哪位帮忙解释下
((HttpServletResponse) response) 的含义啊 HttpServletResponse是一个接口 完全没搞懂这里的用法
throws IOException, ServletException {
((HttpServletResponse) response).setHeader("Pragma", "No-cache");
((HttpServletResponse) response).setHeader("Cache-Control", "no-cache");
((HttpServletResponse) response).setHeader("Expires", "0");
chain.doFilter(request, response);
}
麻烦哪位帮忙解释下
((HttpServletResponse) response) 的含义啊 HttpServletResponse是一个接口 完全没搞懂这里的用法
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