<%@ Pagelanguage= "Java"ContentType= "text/html; charset=utf-8"pageencoding= "UTF-8"%><!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd "><HTML><Head><Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8"><title>Login</title></Head><Body>Login Page<BR><%//destroying sessionsession.invalidate ();%><formAction= "testpw.jsp"Method= "POST">User name:<inputtype= "text"name= "username"/>Password:<inputtype= "Password"name= "Password"/><inputtype= "Submit"value= "Login"/></form></Body></HTML>
<%@ Pagelanguage= "Java"ContentType= "text/html; charset=utf-8"pageencoding= "UTF-8"%><!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd "><HTML><Head><Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8"><title>Insert Title here</title></Head><Body><%//Verify that the user logon information is correct stringun= Request.getparameter ("username");String PW= Request.getparameter ("password");if (un!=""&&pw!=""{//If correct, create session and jump to main.jsp if (Un.equals ("Tom") &&pw.equals ("123") {Session.setattribut E ("username", un); Jump to the System Main Page response.sendredirect ("main.jsp"); } else {//otherwise prompt for login error out.print ("User name or password error"); }}else{out.print ("Please login in the right way"); //%></Body></HTML>
<%@ Pagelanguage= "Java"ContentType= "text/html; charset=utf-8"pageencoding= "UTF-8"%><!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd "><HTML><Head><Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8"><title>Insert Title here</title></Head><Body><%//check session, get session information Object obj=session.getattribute ("username"); if (obj!=null){out.print ("Welcome login"); } else {Out.print ("Session timed out, please login system again"); Response.setheader ("RefResh", "3; URL=login.jsp "); }%>Main Page Face<BR> <ahref= "login.jsp">Sign Out</a></Body></HTML>
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