Servlets :: Designing A Secure / Standard Login System In J2EE
Jul 29, 2014Things in mind while designing a secure, standard login system in J2EE . Code snippets ....
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Servlets :: Restrict User To Login From One System At A Time
Apr 23, 2014In My application I want to implement functionality to let user login from only one system at a time. I am searching for something that can Identify the system uniquely (Like IP address or Mac address ). I am using servlet and I don't know how to access Mac in servelt
View Replies View RelatedServlets :: Form Based JAAS - How To Implement Login System Explicitly Outside Container
Jan 30, 2014I have configured form based JAAS in my app. Basically, in web.xml I have declared security constraints on certain jsp page, declared specific roles, login and error pages. So, my login form is:
<form id="loginForm" action="j_security_check" method="post">
<p>
<label for="name">Username</label> <input name="j_username"
id="username" type="text" required/>
[Code] ....
This works fine when some user tries to access some of the pages declared in <security-constraint> tag of web.xml.
Container automatically manages login process, redirects to login page and if login details are valid, gives access to secured page.
Now, how should I implement login system so that user can go to login page (possibly same login form) and log in from there?
Servlets :: How To Set Httponly To False For A Secure Cookie In 2.5
Mar 26, 2015As below i m creating cookie .
Cookie myCookie = new Cookie("myck", value);
myCookie.setSecure(true);
response.addCookie(myCookie);
I am trying to read that cookie in javascript as below.
var cookieValue = $.cookie("myck");
I can see the cookie in the browser. However the read is not happening I tried to set httponly to false
myCookie.setHttpOnly(false);
However it is throwing compilation error as my servlet version is 2.5
Is there any way to get the cookie in javascript?
Servlets :: J2EE Without Particular Framework
Jul 24, 2014Is it possible to develop huge enterprise applications without any particular framework?
Just with JSP, Servlets and Javascript/Ajax stuffs?
Printer Access Login System
Mar 22, 2014How to hold/cancel print job once it has already been put into the queue in windows with java code?
View Replies View RelatedHow To Hide A Password In Login System
Jan 26, 2015I've made a login system with a username and a password. The password is visible and I wanna hide it, how do I do that? Here is my code (have used swing);
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Password implements ActionListener {
private String Username = "hudhud";
private String Password = "fitness";
[Code] ......
Create A Simple User Database That Could Eventually Turn Into A Login System
Jun 6, 2014So I'm trying to create a simple user database that I could eventually turn into a login system. I created a simple table on MySQL with a name and address for the sake of simplicity. I tried to create simple statement inside my main method that would connect to my MySQL server and when I run my program I get a ClassNotFoundException from "org.gjt.mm.mysql.Driver"..Here is what I have in my main method thus far:
public static void main(String args[]) {
try {
Class.forName("org.gjt.mm.mysql.Driver"); //Load the driver
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/data", "root", ""); //Connect
/*
conn.createStatement().execute("CREATE TABLE people (" + "id int(64) NOT NULL AUTO_INCREMENT," + "name varchar(255) NOT NULL," + "address varchar(255) NOT NULL," + "UNIQUE (id)," + "FULLTEXT(name, address))");
[code]....
I downloaded Connector/J in the the binary .zip form and extracted it to my C: drive and put the .jar file into my java directories lib folder. I also added the directory of the .jar file into my CLASSPATH and I still get the exception.
Servlets :: Redirect After Login
Jan 30, 2014I have a secured Struts application in WebSphere that uses FORM j_security_check for authentication.There is also a Post Logon "filter" defined which runs some code after a login is processed.The extract from web.xml showing the login configuration and filter is as follows:
<login-config>
<auth-method>FORM</auth-method>
<realm-name>MyRealm</realm-name>
<form-login-config>
<form-login-page>/login.html</form-login-page>
<form-error-page>/error.html</form-error-page>
[code]....
If a user isn't logged into the application and they try to access one of the secured servlets, for example quotes.do, they are directed to the login page to enter their information.If they login successfully, they are then directed to quotes.do, rather than the default "welcome" page. Is there a setting in the web.xml or the post logon filter where I can force j_security_check to ALWAYS go to the default welcome page after a successful login?
Servlets :: Not Seem To Work For First Login Request
Mar 26, 2014After confirmation to the login details I added new cookie having logging information and then dispatched this request to controller servlet where this cookie is checked if it is present then user is forwarded to a particular page. Otherwise is redirected to the sign in page. Now the problem is when we add cookies then it is added into "response" object and when we get cookies we get them from "request" object. So for the first time redirection to controller servlet "response" object would not have this cookie as it is not available in "request" object. But will be available for later requests.
My question is what is the way to get this cookie in the first request. Or is there any way to send refresh like response to the browser so that this cookie is added??
Servlets :: Login Form Not Showing Any Output?
Jul 26, 2014iam unable to view my login form using servlet below are my files....
***************************************************************************
LoginServ.java
***************************************************************************
package com.peg.servUserLogin;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
[code]....
i tried ruuning my LoginServ file and i get no error but i also i am not getting any output..(loging page)
Servlets :: How To Create One Login And Have Other WARs Reference It
May 6, 2014I'm trying to design a website that will require users to register and login before they use it. In order to keep things separate, I was thinking it might be useful to create a single web archive that just handles the user signup and login. That way I could work on my other web archive apps independently and have them just check to see if the user has logged in and posted a token somewhere, and if not redirect to the login webpage.
View Replies View RelatedServlets :: Login To Specific Page Like Facebook
Nov 5, 2014There are two designation named admin and student. I just need to work in coding to open specific page by email of person like done in facebook or any other mail account.
well one thing I have done is that I have matched email,password and type(designation) in my servlet page to database and the program run and also open the page.If email,pass,type matched witn admin than admin.jsp opens up else student.jsp.But but I wants to open the specific pafe by email that shows the profile of logged in user like in facebook it opens.
Servlets :: Create A Session After Login And Invalid It After Logout
Apr 1, 2014How can i create a session when i loged in and how can i invalid it when i logout?
View Replies View RelatedServlets :: Creating MVC Java Login Page Web Application
Apr 13, 2014// MY login.jsp class
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<jsp:useBean id="person" scope = "request" class = "com.za.tutotial.mvc.PersonBeanModel"/>
[Code] ....
Servlets :: Implement (Keep Me Signed In) Option In Login Page Of Application
Jun 2, 2014I want to implement a 'Keep me signed in' option in the login page of an application. I have noticed this option is present in the form of a checkbox on the login page of many websites but i don't know how it can be coded . When selected, a user is no longer asked for his username and password on subsequent sessions but he is automatically given access.
View Replies View RelatedServlets :: HTTP Status 404 Error In Basic Login Form
May 22, 2014I'm trying to learn java by making a login page using java, servlet, javascript, html and mysql. I can login with username and password, I can get all the information from database in the edit page. However, when I edit and click on "Submit" in EditPage.jsp, it gives HTTP Status 404. Same screen appears when I click on "Sign Up" from first page (NewFile.jsp) and click on "Submit" button after filling up user information.
I am posting all my code here but probably important ones are:
EditPage.jsp, Edit.java, EditDetails.java, UpdateUser.java and for Sign Up SignUpPage.jsp and Registration.java.
Firstly here are my error message and ss from my project explorer:
Here is my code:
LoginServlet.java
package com.amzi.servlets;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
[Code] ....
Servlets :: Login Form - All Attributes Are Null And HTTP Status 404 Error In Some Cases
May 20, 2014I'm a new Java user and I'm trying to code a simple login page. In first page (NewFile.jsp) users should enter their username and password and should click on "login", or click on "sign up".
1.) If user enters his username and password correctly, a login page (LoginPage.jsp) appears and says "welcome null" but it should show the name of that user instead of null.
2.) In that login page there is an edit button to edit profile information. When I clicked on it, every information is "null" and when I edit them and click on "Submit" button;
HTTP Status 404 -
type Status report
message
description The requested resource () is not available.
GlassFish Server Open Source Edition 3.1.2
that message appears.
3.) If I click on "Sign Up" button at the beginning, a registration jsp (SignUpPage.jsp) appears. After filling up text boxes and clicking on "Submit", same Status 404 screen appears.
I created a mysql database called "loginpage" using xampp. In that database there is a table called "users" and it has un, pass, name, surname, email and degree attributes.
Here is a screenshot of my project explorer:
Here is my code:
1. NewFile.jsp
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<%@ page import="java.util.*"%>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
[Code] .....
Secure Java Files
Oct 4, 2014My friend has a youtube channel with 50.000 - 100.000 subscribers. I dont know the exact amount but he asked me to make a program for his subscribers. I made it in Java and it works perfectly fine but now i want to make it secure so people can't decompile it and read/change the code. Because ofcourse he also has viewers who can hack programs.
But i dont know how i can do that. I dont want to make the code hard to read. I already heard about program which adds lines of code without doing anything actually and programs making the code a lot more complicated. But thats not what i want, i want to make the Class files undecompilable so people cant decompile it to Java files again and read the code.
I know this is possible, Runescape for example is written in Java too and secured good enough in my opinion. I know there are fake Runescape games called private servers or something like that. But its not easy as downloading the game, decompiling it, connecting it to another server and you're done. A little kid can do that but i think its even possible that people just programmed Runescape again from scratch.So i want to make my program very hard to decompile or even impossible, i want it as impossible as possible.
Servlets :: Large File Upload From Client To Content Management System
Sep 3, 2009I have a requirement where a large file (100 -200MB) is uploaded from the client to a content management system. I am using a servlet with Apache Commons File Upload API. Apache FileUpload has 2 ways of handling files,
1) Non-Streaming
2) Streaming
Currently I use the Non-Streaming approach where the servlet stores the file in a temp location and upload the same into the content management system - This is taking lot of time so I am trying to implement Streaming API.
Content Management API supports streaming in 2 methods,
a) SetContent - Takes the file's ByteArrayOutputStream as input -> This gives OutOfMemoryException because the file being large
b) AppendContent - Takes the file's ByteArrayOutputStream as input -> This method can be called multiple times to upload the large file but I dont know how to do this. The Apache File Upload gives InputStream of the file and I need to split that into chuncks and append into the content management system.
How to convert InputStream to 4KB ByteArrayOutputStream so that I can use the AppendContent method in content management API?
Designing Address Book In Java
Jan 12, 2014I am designing an address book. I have come up with the following design:
Address Book:
Attributes : Entry
Methods: add(), delete(), search()
Entry:
Attributes : Name, Address, Phone Number
Methods: addName(),editName(),deleteName(),addPhone(),editPhone(),deletePhone(),addAddress(),editAddress(),deleteAddress()
Name:
Attributes: firstName, lastName
PhoneNumber:
Attributes:areaCode, phoneNumber
Address:
Attributes:streetNumber,streetName,city,zip.
Swing/AWT/SWT :: Using JFrame Class In GUI Designing
Jul 16, 2014I have one question that suppose I am designing a Swing applications and I am using JFrame as Top level container.
So what is best
1)first Extends that class like
public class A Extends JFrame
{
//Do all stuff with Top Level container with gui
}
2)Or design like this from this source
[URL] ....
package components;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/* TopLevelDemo.java requires no other files. */
public class TopLevelDemo {
/**
* Create the GUI and show it. For thread safety, this method should be invoked from the event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
[Code] .....
Servlets :: File Is Located In Root Directory Of Project But System Cannot Find File Specified
Jan 10, 2015I need to make some operations with a file. I struggle to understand why Apache is throwing this error:
(The system cannot find the file specified)
My file is located in the root directory of the project.
And here is how I indicate the path to it:
String filePath = "default.jpg";
InputStream inputStream = new FileInputStream(new File(filePath));
If I put the file in the Eclipse folder, it works... But I need it to work if I put it in my project's root folder.
Designing Jar File Where Access Of Certain Database Provided Through API
Jan 30, 2015I'm given a task to generate an API (a jar file) where the access of a certain database is provided through the API. basic functionality: Client sends a query through the API to server and the Server responds with data.Since its and API, do I have to implement the code or is it enough if i gave just interfaces? what are the OOP concepts to focus on when designing a good API.
View Replies View RelatedDesigning A Game That Simulates Roomba Robot Vacuum
Feb 14, 2014I am designing a game that simulates a roomba robot vacuum and have most of the framework done. So I have random floating circles and the Roomba bot in the center. The boot is suppose to move with the arrow keys. However when i run the program and select the keys nothing happens. Here's my code.
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Ellipse2D;
import java.awt.Graphics;
import javax.swing.*;
public class Roomba extends JFrame implements ActionListener, KeyListener{
[Code] .....
Designing Media Player - Program Cannot Play Any Song
Feb 24, 2014i want to design a media player but my program can't play any song it is showing me error "Uncompilable source code - cannot find symbol
symbol: class MediaPanel
location: class media.Media
at media.Media.main(Media.java:28)"
This is my code.
package media;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.JFileChooser;
[Code] .....
I got the code from [URL] .....