SSH 登录拦截器(过滤器)！

偏执的太偏执、 2023-10-17 15:13 129阅读 0赞

import java.io.IOException;
    
    import javax.servlet.Filter;
    import javax.servlet.FilterChain;
    import javax.servlet.FilterConfig;
    import javax.servlet.ServletException;
    import javax.servlet.ServletRequest;
    import javax.servlet.ServletResponse;
    import javax.servlet.annotation.WebFilter;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    
    import com.hlx.entity.Depts;
    //必须进行登录！否则拦截！
    @WebFilter(filterName = "LoginFilter", urlPatterns = "*.jsp")
    public class LoginFilter implements Filter {
    
    	@Override
    	public void destroy() {
    		// TODO Auto-generated method stub
    
    	}
    
    	@Override
    	public void doFilter(ServletRequest req, ServletResponse resp,
    			FilterChain chain) throws IOException, ServletException {
    
    		// 请求对象
    		HttpServletRequest request = (HttpServletRequest) req;
    		// 响应对象
    		HttpServletResponse response = (HttpServletResponse) resp;
    		// 会话对象
    		HttpSession session = request.getSession(true);
    
    		// 请求路径
    		String url = request.getRequestURI();
    		System.out.println(url);
    
    		// 获得对象
    		Depts dept = (Depts) session.getAttribute("depts");
    
    		if (dept == null && url.indexOf("login.jsp") == -1) {
    
    			String location = "login.jsp";
    
    			request.getRequestDispatcher(location).forward(request, response);
    
    			System.out.println("成功拦截到入侵网站后台   :  " + url);
    
    			//清空缓存
    			response.setHeader("Cache-Control", "no-store");
    			response.setDateHeader("Expires", 0);
    			response.setHeader("Pragma", "no-cache");
    
    		} else {
    			chain.doFilter(request, response);
    		}
    
    	}
    
    	@Override
    	public void init(FilterConfig arg0) throws ServletException {
    		// TODO Auto-generated method stub
    
    	}
    
    }