Grails通过sessionId获取session对象

思路：自定义一个类用来监听session，所有session存入map中，sessionId作为读取的key

创建监听类 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 中注册

import com.session.SessionTracker// Place your Spring DSL code here
beans = {// 自定义session监听器sessionTracker(SessionTracker)
}

获取session

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