filter 登录过滤笔记

来源：互联网发布：淘宝买亚航行李托运编辑：程序博客网时间：2024/06/03 08:35

wmiao：一段登录过滤的代码仅作参考!

web.xml

<filter><filter-name>SessionFilter</filter-name><filter-class>com.goocom.filter.SessionFilter</filter-class><init-param><param-name>logonStrings</param-name><param-value>login/login.jsp</param-value></init-param><init-param><param-name>includeStrings</param-name><param-value>.jsp;.do</param-value></init-param><init-param><param-name>noIncludeStrings</param-name><param-value>forward.jsp;login.do;login_win.jsp</param-value></init-param><init-param><param-name>redirectPath</param-name><param-value>/common/forward.jsp</param-value></init-param><init-param><param-name>disabletestfilter</param-name><param-value>Y</param-value></init-param></filter><filter-mapping><filter-name>SessionFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping>

SessionFilter.java

public class SessionFilter implements Filter {public static boolean isContains(String container, String[] regx) {boolean result = false;for (int i = 0; i < regx.length; i++) {if (container.indexOf(regx[i]) != -1) {return true;}}return result;}public FilterConfig config;public void setFilterConfig(FilterConfig config) {this.config = config;}public FilterConfig getFilterConfig() {return config;}public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException {HttpServletRequest httpreq = (HttpServletRequest) request;HttpServletResponse httpres = (HttpServletResponse) response;HttpServletResponseWrapper wrapper = new HttpServletResponseWrapper((HttpServletResponse) response);String logonStrings = config.getInitParameter("logonStrings");String includeStrings = config.getInitParameter("includeStrings");String noIncludeStrings = config.getInitParameter("noIncludeStrings");String redirectPath = httpreq.getContextPath()+ config.getInitParameter("redirectPath");String disabletestfilter = config.getInitParameter("disabletestfilter");if (disabletestfilter.toUpperCase().equals("N")) {chain.doFilter(request, response);return;}String[] logonList = logonStrings.split(";");String[] includeList = includeStrings.split(";");String[] noIncludeList = noIncludeStrings.split(";");UserVO user = (UserVO) httpreq.getSession().getAttribute("userVO");if (user == null) {if (!this.isContains(httpreq.getRequestURI(), includeList)) {chain.doFilter(request, response);return;}if (this.isContains(httpreq.getRequestURI(), logonList)) {chain.doFilter(request, response);return;}if (this.isContains(httpreq.getRequestURI(), noIncludeList)) {chain.doFilter(request, response);return;}wrapper.sendRedirect(redirectPath);} else {chain.doFilter(request, response);}}public void destroy() {this.config = null;}public void init(FilterConfig filterConfig) throws ServletException {this.config = filterConfig;}}/* * <filter> <filter-name>SessionFilter</filter-name> * <filter-class>com.goocom.filter.SessionFilter</filter-class> <init-param> * <param-name>logonStrings</param-name> <param-value>login/login.jsp</param-value> * </init-param> <init-param> <param-name>includeStrings</param-name> * <param-value>.jsp;.html</param-value> </init-param> <init-param> * <param-name>redirectPath</param-name> <param-value>/login/login.jsp</param-value> * </init-param> <init-param> <param-name>disabletestfilter</param-name> * <param-value>Y</param-value> </init-param> </filter> <filter-mapping> * <filter-name>SessionFilter</filter-name> <url-pattern>/*</url-pattern> * </filter-mapping> */

forward.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><jsp:directive.page import="com.goocom.util.Global" /><%String path = request.getContextPath();%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"></head><mce:script language=javascript></mce:script><body onload="doLoad()"><a href="<%=path%>/login/login.jsp" target="_top" id="a1"></a></body></html>