简述session与cookie区别（简述会话cookie区别与）

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1、简述session与cookie区别(简述会话cookie区别与)Sessionisthestoragespaceofaservermaintainedbytheendoftheapplicationserver,userscormectingtotheserver,willgenerateauniqueSessionlDSessionstoragespacebytheserver,usingtheSessionlDidentifiertoaccessserver・TheSessionlDdataissavedtotheclientandstoredinCookie・Whentheu

2、sersubmitsthepage,itsubmitstheSessionlDtotheservertoaccesstheSessiondata・Thisprocessisnotinterventionbydevelopers・SooncetheclientdisablesCookie,thentheSessionwillfai1.TheservercanalsopassthevalueofSessionlDthroughURLoverwrite,soitisnotentirelydependentonCookie・IftheclientCookieisdisabled,theser

3、verautomaticallysavesthevalueoftheSessionbyoverridingtheURL,andtheprocessistransparenttotheprogrammer・Youcantry,ifnotwriteCookie,intheuseofrequest・getCookies(Cookie);removethearraylengthis1,andthenameofthisCookieisJSESSIONID,thereisaverylongbinarystringisthevalueofSessionlD・Cookieistheclient，ss

4、toragespace,maintainedbybrowsers・Insomesituationssuchasvoting,weoftenbecausetheprincipleoffairnessforeachpersoncanonlyvoteinsomeWEBinthedevelopmentofthesituationissimilar,weusuallyuseCOOKIEtorealize,forexamplethefollowingcode:<%cookie[]cookies=request.getCookies();If(cookies・lenght二0cookies二二nu

5、ll)DoStuffForNewbie();//notvisitedElse(doStuffForReturnVisitor);//havevisited%>Itisveryeasytounderstandthetruth,todetecttheexistenceofCOOKIE,iftherethathaverunwriteCOOKIEcode,however,runtheabovecode,wheneverresultsareexecuted(doStuffForReturnVisitor),throughthe-Internetcontrolpanelset-viewfileb

6、utalwayscannotseethegeneratedcookiefile,strange・Whenthecodeisnoproblem,butsincethereiscookie,itisshow.Cookie[]cookies二request・getCookies();If(cookies,lenght=0

7、

8、cookies二二null)Out・printin("Hasnotvisitedthiswebsite");ElseFor(inti二0;I

9、"cookievalue:z/+Cookie[i]・getValue());}}Operationresult:Cookiename:JSESSIONIDcookievalue:KWJHUG6JJM65HS2K6Whyiscookie,weallknowthatHTTPisastatelessprotocol,clientreadthewebpage,theserverwillopenanewsession,buttheserverwillnotautom