JSP的login程序代码

＜!-- login manager --＞＜java type="class"＞ public static boolean checkuserpermission(httpsession mysession, }httpservletrequest request, httpservletresponse response){if (mysession.getvalue("haspermission") == null || !((boolean) mysession.getvalue ("haspermission" )).booleanvalue()){string requestedurl = httputils.getrequesturl(request).tostring();string querystring = request.getquerystring();if (querystring != null){requestedurl = requestedurl + "?" + querystring;}requestedurl = response.encodeurl(requestedurl);mysession.putvalue("requestedurl", requestedurl);return false;}else{return true;}} ＜/java＞ ＜%// javascript/" target="_blank">jsp文献string gooduser = "bill";string goodpass = "bobo";httpsession mysession = request.getsession(true);string errormessage = "please login to access the page you requested";boolean loginattempt = false;string mymethod = request.getmethod();if (request.getparametervalues("click") != null && request.getparametervalues ("click")[0].trim().equals("log in")){loginattempt = true;} if (loginattempt){string username = request.getparametervalues("user")[0].trim();string password = request.getparametervalues("pass")[0].trim();//out.println("username = |" + username + "| & password = |" + password + "|＜br＞");if (gooduser.equals(username) && goodpass.equals(password)){response.sendredirect((string)mysession.getvalue("requestedurl"));mysession.putvalue("haspermission", new boolean(true));errormessage = "unable to redirect: " + (string) mysession.getvalue("requestedurl");}else{errormessage = "you did not get the username or password right";}}else{errormessage = "haven't tried logging in yet.";if (mysession.getvalue("requestedurl") == null){mysession.putvalue("requestedurl", "/index.jsp");}//out.println("set userreferrer to " + mysession.getvalue("redirectto") + "＜br＞");}%＞ ＜center＞＜font color=red＞＜%=errormessage%＞＜/font＞＜table align=center＞＜form action="adminlogin2.jsp" method=post name="login"＞＜tr＞＜td＞username:＜/td＞＜td＞＜input type=text name=user value=""＞＜/td＞＜/tr＞＜tr＞＜td＞password:＜/td＞＜td＞＜input type=password name=pass value=""＞＜/td＞＜/tr＞＜tr＞＜td colspan=2 align=center＞＜input type=submit name=click value="log in"＞ ＜/td＞＜/tr＞＜/form＞＜/table＞＜/center＞original url: ＜%= (string)mysession.getvalue("requestedurl") %＞＜script language="javascript"＞// ＜!--if (document.forms.login != null)document.forms.login.user.focus();// --＞＜/script＞