校验用户是否登录过滤器Filter

校验用户是否登录过滤器Filter

CheckLoginFilter net.cnki.tpi.cms.util.CheckLoginFilter redirectURL /login.jsp notCheckURLList /error.jsp;/login.jsp CheckLoginFilter /* 2、然后新创建一个CheckLoginFilter.java类,代码如下：
/** * 校验用户是否已登录过滤器 * @author lpz * */ public class CheckLoginFilter implements Filter { private FilterConfig filterConfig = null; private String redirectURL = null; private List notCheckURLList = new ArrayList(); public CheckLoginFilter() { } public void destroy() { notCheckURLList.clear(); } public void doFilter(ServletRequest servletRequest,ServletResponse servletResponse,FilterChain chain) throws IOException,ServletException { HttpServletRequest request = (HttpServletRequest)servletRequest; HttpServletResponse response = (HttpServletResponse)servletResponse; HttpSession session = request.getSession(); Object userInfo = session.getAttribute("userInfo"); if(!checkRequestURIIntNotFilterList(request) && userInfo==null){ //重定向到指定页面 response.sendRedirect(request.getContextPath() + redirectURL); }else{ //继续响应请求 chain.doFilter(servletRequest,servletResponse); } } public void init(FilterConfig fConfig) throws ServletException { this.filterConfig = fConfig; redirectURL = filterConfig.getInitParameter("redirectURL"); String notCheckURLListStr = filterConfig.getInitParameter("notCheckURLList"); if(!MyStringUtil.isNullOrEmpty(notCheckURLListStr)){ //将字符串转化为list notCheckURLList = MyStringUtil.convStrToList(notCheckURLListStr,";"); } } /** * 校验当前请求是否在不过滤的列表中 * @param request * @return */ private boolean checkRequestURIIntNotFilterList(HttpServletRequest request) { String uri = request.getServletPath() + (request.getPathInfo() == null