import org.apache.shiro.cache.Cache; import org.apache.shiro.cache.CacheManager; import org.apache.shiro.session.Session; import org.apache.shiro.session.mgt.DefaultSessionKey; import org.apache.shiro.session.mgt.SessionManager; import org.apache.shiro.subject.Subject; import org.apache.shiro.web.filter.AccessControlFilter; import org.apache.shiro.web.util.WebUtils; import com.agood.pojo.ActiveUser; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.Serializable; import java.util.Deque; import java.util.LinkedList; /** * * @Title: KickoutSessionControlFilter.java * @Package com.agood.bejavagod.controller.filter * @Description: 同一用戶後登錄踢出前面的用戶 * Copyright: Copyright (c) 2016 * Company:Nathan.Lee.Salvatore * * @author leechenxiang * @date 2016年12月12日 下午7:25:40 * @version V1.0 */ public class KickoutSessionControlFilter extends AccessControlFilter { private String kickoutUrl; //踢出後到的地址 private boolean kickoutAfter = false; //踢出以前登陸的/以後登陸的用戶 默認踢出以前登陸的用戶 private int maxSession = 1; //同一個賬號最大會話數 默認1 private SessionManager sessionManager; private Cache<String, Deque<Serializable>> cache; public void setKickoutUrl(String kickoutUrl) { this.kickoutUrl = kickoutUrl; } public void setKickoutAfter(boolean kickoutAfter) { this.kickoutAfter = kickoutAfter; } public void setMaxSession(int maxSession) { this.maxSession = maxSession; } public void setSessionManager(SessionManager sessionManager) { this.sessionManager = sessionManager; } public void setCacheManager(CacheManager cacheManager) { this.cache = cacheManager.getCache("shiro-kickout-session"); } @Override protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) throws Exception { return false; } @Override protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception { Subject subject = getSubject(request, response); if(!subject.isAuthenticated() && !subject.isRemembered()) { //若是沒有登陸,直接進行以後的流程 return true; } Session session = subject.getSession(); ActiveUser user = (ActiveUser)subject.getPrincipal(); String username = user.getUserName(); Serializable sessionId = session.getId(); // 同步控制 Deque<Serializable> deque = cache.get(username); if(deque == null) { deque = new LinkedList<Serializable>(); cache.put(username, deque); } //若是隊列裏沒有此sessionId,且用戶沒有被踢出;放入隊列 if(!deque.contains(sessionId) && session.getAttribute("kickout") == null) { deque.push(sessionId); } //若是隊列裏的sessionId數超出最大會話數,開始踢人 while(deque.size() > maxSession) { Serializable kickoutSessionId = null; if(kickoutAfter) { //若是踢出後者 kickoutSessionId = deque.removeFirst(); } else { //不然踢出前者 kickoutSessionId = deque.removeLast(); } try { Session kickoutSession = sessionManager.getSession(new DefaultSessionKey(kickoutSessionId)); if(kickoutSession != null) { //設置會話的kickout屬性表示踢出了 kickoutSession.setAttribute("kickout", true); } } catch (Exception e) {//ignore exception } } //若是被踢出了,直接退出,重定向到踢出後的地址 if (session.getAttribute("kickout") != null) { //會話被踢出了 try { subject.logout(); } catch (Exception e) { //ignore } saveRequest(request); HttpServletRequest httpRequest = WebUtils.toHttp(request); if (ShiroFilterUtils.isAjax(httpRequest)) { HttpServletResponse httpServletResponse = WebUtils.toHttp(response); httpServletResponse.sendError(ShiroFilterUtils.HTTP_STATUS_SESSION_EXPIRE); return false; } else { WebUtils.issueRedirect(request, response, kickoutUrl); return false; } } return true; } }
首先得要有個過濾器命名爲:KickoutSessionControlFilterjava
而後在shiro.xml中須要這麼定義:web
<property name="filters"> <map> <entry key="kickout" value-ref="kickoutSessionControlFilter"/> </map> </property>
<bean id="kickoutSessionControlFilter" class="com.agood.bejavagod.controller.filter.KickoutSessionControlFilter"> <property name="cacheManager" ref="shiroEhcacheManager"/> <property name="sessionManager" ref="sessionManager"/> <!-- 是否踢出後來登陸的,默認是false;即後者登陸的用戶踢出前者登陸的用戶 --> <property name="kickoutAfter" value="false"/> <!-- 同一個用戶最大的會話數,默認1;好比2的意思是同一個用戶容許最多同時兩我的登陸 --> <property name="maxSession" value="1"/> <property name="kickoutUrl" value="/login.action"/> </bean>
最後修改過濾器配置,攔截全部請求apache
/** = kickout,authc