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.BeansExceptionimport org.springframework.context.ApplicationContextimport org.springframework.context.ApplicationContextAwareimport org.springframework.web.context.WebApplicationContextimport javax.servlet.http.HttpSessionimport javax.servlet.http.HttpSessionEventimport javax.servlet.http.HttpSessionListenerimport java.util.concurrent.ConcurrentHashMapimport java.util.concurrent.ConcurrentMapclass SessionTracker implements HttpSessionListener, ApplicationContextAware {    private static final ConcurrentMap
    
      sessions = new ConcurrentHashMap
     
      ();    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 herebeans = {    // 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 sessionTracker    def index() {        // 获取session        def 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    }}