Grails通過sessionId獲取session對象

思路：自定義一個類用來監聽session，所有session存入map中，sessionId作為讀取的key

創建監聽類 SessionTracker

package com.sessionimport org.springframework.beans.BeansException import org.springframework.context.ApplicationContext import org.springframework.context.ApplicationContextAware import org.springframework.web.context.WebApplicationContextimport javax.servlet.http.HttpSession import javax.servlet.http.HttpSessionEvent import javax.servlet.http.HttpSessionListener import java.util.concurrent.ConcurrentHashMap import java.util.concurrent.ConcurrentMapclass SessionTracker implements HttpSessionListener, ApplicationContextAware {private static final ConcurrentMap<String, HttpSession> sessions = new ConcurrentHashMap<String, HttpSession>();void setApplicationContext(ApplicationContext applicationContext) throws BeansException {def servletContext = ((WebApplicationContext) applicationContext).getServletContext()servletContext.addListener(this);}void sessionCreated(HttpSessionEvent httpSessionEvent) {sessions.putAt(httpSessionEvent.session.id, httpSessionEvent.session)}void sessionDestroyed(HttpSessionEvent httpSessionEvent) {sessions.remove(httpSessionEvent.session.id)}HttpSession getSessionById(id) {sessions.get(id)} }

在 grails-app/conf/resources.groovy 中注冊

import com.session.SessionTracker// Place your Spring DSL code here beans = {// 自定義session監聽器sessionTracker(SessionTracker) }

獲取session

package com.geneeimport org.springframework.web.context.request.RequestContextHolderimport javax.servlet.http.HttpSessionclass HiController {// 注入監聽對象def sessionTrackerdef index() {// 獲取sessiondef sessionId = RequestContextHolder.currentRequestAttributes().getSessionId()println "原sessionId:$sessionId"// 根據sessionId獲取session對象HttpSession httpSession = sessionTracker.getSessionById(sessionId).getId()println "獲取到session后:"+httpSession.getId()// 使session立即失效sessionTracker.getSessionById(sessionId).invalidate()render sessionId} }

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