自定义Filter,引入struts1项目(二)

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1. Filter自定义:

import j_mongoDB.JMongoDB;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.HashSet;import java.util.List;import java.util.Set;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.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import com.db.po.User;public class LogFilter implements Filter {private Set<String> nofilterSet;// private static final String LOGON_URI = "LOGON_URI";private String logon_page;public void destroy() {// TODO Auto-generated method stub}public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException {HttpServletRequest req = (HttpServletRequest) request;HttpServletResponse res = (HttpServletResponse) response;res.setContentType("text/html");res.setCharacterEncoding("utf-8");PrintWriter out = res.getWriter();/** * 获取当前url */String cUrl = req.getRequestURI();/** * 获取当前session */HttpSession session = req.getSession();/** * 从session中取到当前用户user */User user = (User) session.getAttribute("user");List<String> priilegeList = new ArrayList<String>();System.out.println("当前连接-URL:" + cUrl);if (nofilterSet.contains(cUrl)) {chain.doFilter(request, response);return;} else {if (user != null && !"".equals(user)) {try {System.out.println("当前用户名:" + user.getUsername()+ ";当前用户ID:" + user.getId());priilegeList = JMongoDB.getUserPrivilegeList(user.getId(),true);System.out.println("当前用户权限:" + priilegeList);if (priilegeList.contains(cUrl)) {chain.doFilter(request, response);} else {out.println("没有权限访问该链接!!!");return;}} catch (Exception e) {e.printStackTrace();}} else {res.sendRedirect(logon_page);}}}@SuppressWarnings("unchecked")public void init(FilterConfig filterConfig) throws ServletException {/** * 通用连接 */nofilterSet = (Set<String>) filterConfig.getServletContext().getAttribute("nofilter");if (nofilterSet == null) {nofilterSet = new HashSet<String>();nofilterSet.add("/z_WebTest/");nofilterSet.add("/z_WebTest/login.do");filterConfig.getServletContext().setAttribute("nofilter",nofilterSet);}logon_page = filterConfig.getInitParameter("LOGON_URI");}}

2. Web.xml配置自定义Filter

<filter>  <filter-name>logFilter</filter-name> <filter-class>com.web.filter.LogFilter</filter-class> <init-param> --><param-name>LOGON_URI</param-name> <param-value>/z_WebTest/</param-value> </init-param> </filter> <filter-mapping> <filter-name>logFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>

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