托里
{
session.remove attribute (logonsessdata )；
session.invalidate (；
stringpagetoforward=request.getcontextpath (；
response.sendredirect (pagetoforward；
}
catch (Exception sqle )
{
}
inlogoutservletiwroteabovecodeindopostanddogetmethod.afterlogoutitshowsloginscreeenandthenifipressbackbuttonitshowspreviouss ccorevious clickonanypageitshows ' http status 500 ' andnowifipressf5then it ' sheatingloginservletandgettingthefeet
howtostopthisproblemshowthatafterlogoutusingbackbuttonandf5usercannotuseanypage？
watyouaredoingisgood.browseriscachingthepreviouspages，andwhenyouclickbackbuttonitistakingtopreviouscachedpage。
youneedtoaddcacheheaderswhichdoesnotallowbrowsertocachepage。