When I click on logout button I still can go back to previous page using...
I have a servlet where i validate the login using POST and logout using GET. So, i want when i click on logout button, i cannot go back to previous page because the session is terminate. But it did not...
View Articlejava.lang.IllegalStateException: Cannot (forward | sendRedirect | create...
This method throws java.lang.IllegalStateException: Cannot forward after response has been committedand I am unable to spot the problem. Any help? int noOfRows =...
View Articlejava dynamic project error : access denied...
I was trying to connect to database in my web project using jdbc, but it throws errorjdk 21tomcat v10.1 serverpackage com.server;import jakarta.servlet.ServletException;import...
View ArticleFailed to load resource: the server responded with a status of 404 (). in...
[enter image description here](https://i.sstatic.net/e8oiecSv.png) [enter image description here](https://i.sstatic.net/XIgTjSvc.png) [enter image description...
View ArticleWhat's the difference between RequestDispatcher.forward() and...
What is the difference between RequestDispatcher's forward() and HttpServletResponse's sendRedirect() method?Can anyone explain with a example and best usage of these methods with a real time example?
View ArticleClik here to view.
Tomcat giving 404 error with servlets
I have developed a Java web application using Tomcat 7 and Oracle JDK 1.7 with NeatBeans 7.3. My application runs on my local pc without any errors.But after i hosted my application, I can't access...
View ArticleHow to install JDBC driver in servlet based project without facing...
There is a VERY similar question to mine but in my case I don't have any duplicate jars in my build path, so the solution does not work for me. I've searched google for a couple of hours now, but none...
View ArticleServlet doGet() ClassNotFound on mysql:jdbc driver [duplicate]
I'm using Eclipse/Tomcat10/MySql and have added both Java jdbc libraries to my classpath. Major clue: This works as long as I refactor the servlet to a POJO, loading the driver in main(). When I...
View ArticleJSP redirection trough a servlet is not functioning as expected [duplicate]
Hey so i am running a program that when a cell on a board(on a jsp) is clicked, a servlet is launched, and that servlet can redirect to 1 of 2 jsp, my problem is that this redirection seems to not be...
View Articleorg.restlet.jee:org.restlet.ext.servlet Lib does not support jakarta package...
I am working with org.restlet.ext.servlet-2.4.0.jar lib and upgrading my code Java 8 to Java 21 version. but when execute the code at time following error occur. and it is not support jakarta class for...
View ArticleServlet class org.restlet.ext.servlet.ServerServlet is not a...
What could be causing this error? Caused by: jakarta.servlet.UnavailableException: Servlet class org.restlet.ext.servlet.ServerServlet is not a jakarta.servlet.Servlet at...
View ArticleApache Velocity - Resource not found exception
I have a requirement to generate some automated mails and so I wanted to use velocity for this task.I have copied all velocity jars to the lib folder and created a hello.vm template and placed in...
View ArticleTake a single JSON object and divide it into multiple JSON objects. make API...
I have a large dynamic JSON data and I want to split it into multiple JSON objects to make API requests dynamically in Java.The data I receive is a large dynamic JSON, and I need to split it into...
View ArticleError with login session/cache using Servlets and JSP
I don't know how to describe the problem very well technically, but I'm making an application using Servlets and JSP and I'm having a specific user authentication problem.When I log in as a user with...
View ArticleAdding Thread.sleep in spring boot web app adding delays to subsequent...
@RestControllerpublic class HomeController { @GetMapping("/") public String greet() throws InterruptedException { System.out.println(Thread.currentThread().getName()); Thread.sleep(4000); return...
View ArticleHow to resolve req.getParameter() returning null in servlet?
I am reading 2 numbers as input and am trying to print them in the output dynamically using Servlet, req.getParameter() returns null:HTTP Status 500 – Internal Server Error Type Exception ReportMessage...
View ArticleIBM WebSphere deployment error - Servlet name for the servlet mapping...
We are migrating from Java 8 to Zulu OpenJDK 17. Our application uses IBM WebSphere Application Server 9.0.0.6 and JSF 2.2. We can install the EAR file successfully on the IBM WebSphere server, but...
View ArticleHow can i save images to database by java code? [closed]
My project is about JSP Servlet, I want to upload images from client and save it to database, after show that on the table of content.I don't know how to code that module and the dependencies use for...
View ArticleWhy can't I use a fourth Servlet in JAVA EE? [closed]
I have the following situation: I am working on a project in which I initially used 3 servlets and everything worked very well, the problem was when I tried to create a fourth servet. For some reason...
View ArticleJava: How to get intercept on Filter after it returns from the controller
The filter is triggered for incoming request but not for the responses.Spring Interceptors gives the functionality to handle the request before and after it hits the controller. I want to build...
View Article