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public class CheckFilter implements Filter {
public void destroy() {
}
public void doFilter(ServletRequest req, ServletResponse res,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest requ = (HttpServletRequest)req;
HttpSession session = requ.getSession();
if(session.getAttribute("user")==null){
requ.getRequestDispatcher("/login.jsp").forward(requ, res);
return;
}
chain.doFilter(req, res);
}
public void init(FilterConfig arg0) throws ServletException {
;
}
}