单应用登录过滤器

  • Z时代
  • 2024-01-10
  • 分类：综合

编程

判断 url 是否为 登录页面，是则放行

                                         否：获取session，存在 放行，不存在拦截

 2.   税务系统登录：

public class LoginFilter implements Filter {
	@Override
	public void destroy() {
	}
	@Override
	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest)servletRequest;
		HttpServletResponse response = (HttpServletResponse)servletResponse;
		String uri = request.getRequestURI();
		//判断当前请求地址是否是登录的请求地址
		if(!uri.contains("sys/login_")){
			//非登录请求
			if(request.getSession().getAttribute(Constant.USER) != null){
				//说明已经登录过
				//判断是否访问纳税服务系统
				if(uri.contains("/nsfw/")){
					//访问纳税服务子系统
					User user = (User)request.getSession().getAttribute(Constant.USER);
					//获取spring容器
					WebApplicationContext applicationContext = WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());
					PermissionCheck pc = (PermissionCheck)applicationContext.getBean("permissionCheck");
					if(pc.isAccessible(user, "nsfw")){
						//说明有权限，放行
						chain.doFilter(request, response);
					} else {
						//没有权限，跳转到没有权限提示页面
						response.sendRedirect(request.getContextPath() + "/sys/login_toNoPermissionUI.action");
					}
				} else {
					//非访问纳税服务子系统，则直接放行
					chain.doFilter(request, response);
				}
			} else {
				//没有登录，跳转到登录页面
				response.sendRedirect(request.getContextPath() + "/sys/login_toLoginUI.action");
			}
		} else {
			//登录请求；直接放行
			chain.doFilter(request, response);
		}
	}
	@Override
	public void init(FilterConfig arg0) throws ServletException {
	}
}

      3. 电力系统登录拦截

public class SystemFilter implements Filter {
	//存放系统没有Session，但是需要访问的url，像这样的连接需要放行
	List<String> list = new ArrayList<String>();
	/**当服务启动的时候初始化*/
	public void init(FilterConfig config) throws ServletException {
		list.add("/index.jsp");
		list.add("/image.jsp");
		list.add("/system/elecMenuAction_menuHome.do");
		list.add("/error.jsp");
		list.add("/system/elecMenuAction_logout.do");
	}
	/**每次访问URL连接之前，都要访问的方法*/
	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) res;
		//记住我的代码放置到过滤器中
		String path = request.getServletPath();
		this.forwordIndexPage(request,path);
		//如果当前访问的连接是定义list中存放的连接，此时需要放行
		if(list.contains(path)){
			chain.doFilter(request, response);
			return;
		}
		//存在Session（不为空）的时候要放行，Session为空的时候，定向到首页
		ElecUser elecUser = (ElecUser)request.getSession().getAttribute("globle_user");
		if(elecUser!=null){
			//从数据库中查询获取登录状态
			WebApplicationContext ac = WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());
			IElecUserService elecUserService = (IElecUserService)ac.getBean(IElecUserService.SERVICE_NAME);
			ElecUser user = elecUserService.findElecUserByID(elecUser);
			Long logonStateDb = user.getLogonState();
			//从Session中查询登录状态
			Long logonState = elecUser.getLogonState();
			if(logonStateDb.equals(logonState)){
				chain.doFilter(request, response);
				return;
			}
			else{
				request.setAttribute("errorMsg", "您的账号已经在异地登录，换句话说，您被踢了！");
			}
		}
		//重定向，由于传递request作用域失效
//		response.sendRedirect(request.getContextPath()+"/error.jsp");
		//转发
		request.getRequestDispatcher("/error.jsp").forward(request, response);
	}
	/**销毁*/
	public void destroy() {
	}
	//记住我的代码放置到过滤器中，在跳转到index.jsp页面之前
	private void forwordIndexPage(HttpServletRequest request, String path) {
		if(path.equals("/index.jsp")){
			String name = "";
			String password = "";
			String checked = "";
			Cookie [] cookies = request.getCookies();
			if(cookies!=null && cookies.length>0){
				for(Cookie cookie:cookies){
					if(cookie.getName().equals("name")){
						name = cookie.getValue();
						//处理中文二进制解码问题
						try {
							name = URLDecoder.decode(name, "UTF-8");
						} catch (UnsupportedEncodingException e) {
							e.printStackTrace();
						}
						checked = "checked";
					}
					if(cookie.getName().equals("password")){
						password = cookie.getValue();
					}
				}
			}
			request.setAttribute("name", name);
			request.setAttribute("password", password);
			request.setAttribute("checked", checked);
		}
	}
}

  拦截器拦截 url :

<!-- 自定义过滤器，要放置到struts2的过滤器的上面 -->
  	<filter>
  		<filter-name>SystemFilter</filter-name>
  		<filter-class>cn.itcast.elec.util.SystemFilter</filter-class>
  	</filter>
  	<filter-mapping>
  		<filter-name>SystemFilter</filter-name>
  		<url-pattern>*.jsp</url-pattern>
  		<url-pattern>*.do</url-pattern>
  	</filter-mapping>

 

以上是 单应用登录过滤器 的全部内容， 来源链接： utcz.com/z/512869.html

回到顶部