java - Servlet not directing to JSP page -
we required write web application using java, html, beans, , jsps. problem have never taken html or css course.
i have base html page called index.html takes user's first , last name in text field submit button. when press submit "page cannot displayed error." have compared code instructors , similar unsure doing wrong. appreciated.
also, not mind horrible formatting.
index.html
<!doctype html> <html> <head> <title>final project</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <h1>welcome banking tyler weaver</h1> <h4>please enter first , last name</h4> <form action="bankingcontrol" method="post"> <input type="hidden" name="action" value="menu"> first name: <input type="text" name="firstname" required/> <br></> last name: <input type="text" name="lastname" required/> <br></> <input type="submit" value="login"/> </form> </body> </html> bankingcontrol.java
import beans.user; import database.mysql; import java.io.ioexception; import java.sql.connection; import java.sql.sqlexception; import java.util.logging.level; import javax.servlet.servletexception; import javax.servlet.annotation.webservlet; import javax.servlet.http.httpservlet; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse; import utilities.errorlogger; @webservlet(name = "bankingcontrol", urlpatterns = {"/bankingcontrol"}) public class bankingcontrol extends httpservlet { private static final string mysqlprefix = "jdbc:mysql://"; private static final string hostname = "cs3db.bloomu.edu"; private static final string databasename = "cs3"; private static final string databaseurl = mysqlprefix + hostname + "/" + databasename; private static final string username = "tgw46366"; private static final string password = "tgw46366"; protected void processrequest(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception { response.setcontenttype("text/html;charset=utf-8"); //creates mysql database connection specified information mysql mysql = new mysql(databaseurl, username, password); //the url processor send. string jsp_url = "/index.html"; //tries making connection database try (connection conn = mysql.getconnection()) { errorlogger.log(level.info, "database connection obtained"); //retrieve action page string action = request.getparameter("action").trim(); //if action null, make menu if (action == null) { action = "menu"; } user user = new user(); user.setfirstname(request.getparameter("firstname").trim()); user.setlastname(request.getparameter("lastname").trim()); request.setattribute("user", user); //check see if action menu if (action.equalsignorecase("menu")) { //place send information jsp_url = "/menu.jsp"; errorlogger.log(level.info, "user " + user.getfirstname() + " " + user.getlastname() + " logged in - menu page returned"); } else if (action.equalsignorecase("newcustomer")) { jsp_url = "/newcustomer.jsp"; errorlogger.log(level.info, "new customer selected"); } else if (action.equalsignorecase("newaccount")) { jsp_url = "/newaccount.jsp"; errorlogger.log(level.info, "new account selected"); } else if (action.equalsignorecase("accounttransaction")) { jsp_url = "/transaction.jsp"; errorlogger.log(level.info, "account transaction selected"); } else if (action.equalsignorecase("logout")) { jsp_url = "/index.html"; errorlogger.log(level.info, "logout selected"); } else { errorlogger.log(level.warning, "invalid option -- index.html returned"); } //if connection cannot made, throw here } catch (sqlexception ex) { errorlogger.log(level.severe, "not making database connection @ time", ex); } //forward correct jsp getservletcontext() .getrequestdispatcher(jsp_url) .forward(request, response); } @override protected void doget(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception { processrequest(request, response); } @override protected void dopost(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception { processrequest(request, response); } @override public string getservletinfo() { return "short description"; } } mysql.java
import java.sql.connection; import java.sql.drivermanager; import java.sql.sqlexception; import java.util.logging.level; import utilities.errorlogger; public class mysql { private final string databaseurl; private final string username; private final string password; public mysql(string databaseurl, string username, string password) { this.databaseurl = databaseurl; this.username = username; this.password = password; initdb(); } private void initdb() { try { class.forname("com.mysql.jdbc.driver").newinstance(); //not needed mysql - here show } catch (classnotfoundexception ex) { errorlogger.log(level.severe, "could not find class com.mysql.jdbc.driver \n" + "program exit. ", ex); system.exit(1); } catch (instantiationexception ex) { errorlogger.log(level.severe, "could not instaniate class com.mysql.jdbc.driver \n" + "program exit. ", ex); system.exit(1); } catch (illegalaccessexception ex) { errorlogger.log(level.severe, "could not access class com.mysql.jdbc.driver \n" + "program exit. ", ex); system.exit(1); } try { connection conn = drivermanager.getconnection(databaseurl, username, password); conn.close(); } catch (sqlexception ex) { errorlogger.log(level.severe, "could not connect database. " + "database string = " + databaseurl + " user = " + username + " password " + password, ex); system.exit(1); } } public connection getconnection() { connection conn = null; try { conn = drivermanager.getconnection(databaseurl, username, password); } catch (sqlexception e) { errorlogger.log(level.severe, "could not connect database. " + "database string = " + databaseurl + " user = " + username + " password " + password); system.exit(1); } return conn; } public void closeconnection(connection connection) { if (connection != null) { try { connection.close(); } catch (sqlexception e) { errorlogger.log(level.severe, "sql exception thrown while " + "trying close connection object. connection " + "object not null.", e); } } } } errorlogger.java
import java.io.ioexception; import java.sql.date; import java.text.dateformat; import java.text.simpledateformat; import java.util.logging.filehandler; import java.util.logging.handler; import java.util.logging.level; import java.util.logging.logger; public class errorlogger { private static final string errorfilename = "sqlerrorlogger"; public static boolean showloginerrorwindow = true; private static logger errorlogger; private static void initializelogging() throws ioexception { string logfile = getlogfilename(); errorlogger = logger.getlogger(logfile); handler handler = new filehandler(logfile); handler.setformatter(new java.util.logging.simpleformatter()); if (showloginerrorwindow) { errorlogger.setuseparenthandlers(true); } else { errorlogger.setuseparenthandlers(false); } errorlogger.addhandler(handler); } private static string getformatteddate(date date) { dateformat format; format = new simpledateformat("mm-dd-yyyy"); return (format.format(date)); } private static string getformattedtime(date date) { dateformat format; format = new simpledateformat("hh.mm.a"); return (format.format(date)); } private static string getdatetime(date date) { string sdatetime = getformatteddate(date) + "_" + getformattedtime(date); return sdatetime; } private static string getlogfilename() { string logfilename = errorfilename; date date = new date(system.currenttimemillis()); string sformatteddatetime = getdatetime(date); logfilename += "_" + sformatteddatetime; logfilename += ".log"; return logfilename; } public static string getnewlogfilename(string logfilebase, string logfileext) { string logfile = logfilebase; date date = new date(system.currenttimemillis()); string sformatteddatetime = getdatetime(date); logfile += "_" + sformatteddatetime; logfile += logfileext; return logfile; } public static void log(level level, string message, throwable ex) { if (errorlogger == null) { initlogger(); } errorlogger.log(level, message, ex); } public static void log(level level, string message) { if (errorlogger == null) { initlogger(); } errorlogger.log(level, message); } private static void initlogger() { try { initializelogging(); } catch (ioexception ex) { errorlogger = logger.getlogger(getlogfilename());//will not write file errorlogger.log(level.severe, "could not create file handler teh error logger"); } } public static void main(string[] args) { errorlogger.log(level.severe, "test error message"); } } this should minimum required reproduce wrong aside sample database , information. of jsp pages load individually not start index.html. makes difficult debug rest of application. appreciated.
directory:
image of errors!
just put answer here in case running this. problem internal server error occurred due missing jars.
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