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location ~*\.(gif|jpg|png|jpeg)$ {    root /web;    valid_referers none blocked www.longxiabiancheng.com;    if($invalid_referer){        return 403;    }}

public class MyResourceFilter implements Filter {    @Override    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {        HttpServletRequest request = (HttpServletRequest) servletRequest;        HttpServletResponse response = (HttpServletResponse) servletResponse;        //獲取referer        String referer =request.getHeader("Referer");        //指定通過的域名        String allowedDomain = "https://www.longxiabiancheng.com";        //如果不是可以通過的域名，直接返回        if(StringUtils.isEmpty(referer) || !referer.startsWith(allowedDomain)){            response.getWriter().write("longxiabiancheng");            return;        }    }}

private boolean checkTime(HttpServletRequest request, HttpServletResponse response) {        //獲取時間戳        String timestampStr = request.getParameter("timestamp");
        try {            //時間戳不存在，直接拒絕訪問            if (timestampStr == null) {                response.getWriter().write("不可以繼續(xù)訪問哦");                return false;            }
            long timestamp = Long.parseLong(timestampStr);            long currentTimestamp = new Date().getTime();            //如果停留的時間大約指定的時間  就認為不是機器            if (Math.abs(currentTimestamp - timestamp) < 500) {                response.getWriter().write("不可以繼續(xù)訪問哦!");                return false;            }            return true;        } catch (Exception e) {            return false;        }    }