URL权限过滤（1）
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import javax.servlet.Filter;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.FilterChain;import java.io.IOException;import java.util.Set;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpSession;import javax.servlet.http.HttpServletResponse;public class PermissiondoFilter implements Filter {private FilterConfig filterConfig;private FilterChain chain;private HttpServletRequest request;private HttpServletResponse response;public void destroy() {this.filterConfig = null;}public void init(FilterConfig filterConfig) throws ServletException {this.filterConfig = filterConfig;}public void doFilter(ServletRequest servletRequest,ServletResponse servletResponse, FilterChain chain) {this.chain = chain;this.request = (HttpServletRequest) servletRequest;this.response = ((HttpServletResponse) servletResponse);String url = request.getRequestURI();System.out.println("访问的完整路径-->" + url);try {HttpSession session = request.getSession();// 获取网站访问根目录String accessPath = request.getContextPath();System.out.println("-访问的网站根目录-" + accessPath);// 截获根目录以后的路径即'/项目名'以后的路径;url = url.substring(accessPath.length() + 1, url.length());System.out.println("-访问-" + url);LoginUser loginUser = (LoginUser) session.getAttribute("loginUser");System.out.println("url-->" + url);if (noVerifyUrl(url, request)) {chain.doFilter(request, response);} else if (loginUser == null) {response.sendRedirect(accessPath + "/login.jsp");} else {System.out.println(loginUser.getUserName() + "-访问-" + url);verifyUrl(url, loginUser);}} catch (Exception sx) {sx.printStackTrace();}}