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Servlet is a Java application programming interface (API) running on the server machine which can intercept the requests made by the client and can generate/send a response accordingly.

servlets
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I would like to implement a remember-me functionality in my very plain servlet-based system. No Spring, No Shiro, nothing. I'm mightily struggling to make it work. On paper, it seems fairly ...
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I'm running a Java 21 web application with a static part under /webapp path. Until Jetty 11, we used the DefaultServlet for this....
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I am migrating an application to Liberty. The application is servlet-based and uses JSP files. I have created Dockerfiles, a Helm chart, and Liberty configuration files such as ...
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Suppose I want to create a simple counter app with three different servlets: one to read the value (GET), one to increment and one to decrement the value (both POST): readvalue.java: ...
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<img src="images/logo.png"> I created a web project using HTML and Servlets (no JSP). When I open the HTML file directly using “Open in Browser,” the image displays correctly. But when ...
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So basically I have put up my backend on Render web Service (on tomcat) and my frontend(Nextjs) is on Vercel. I have put up a Filter for Cors Policy to intercept all policies and as well as handled ...
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I have a Jersey servlet project, where I organize the depencies with maven. It runs in Tomcat. Update of slf4j-api Now I am trying to use ...
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I have inherited some JAX-RS code with a logout function that appears to be properly "logging out" the user by redirecting to the login page, invalidating the session, and expiring the ...
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I want to be able to capture HTML content and then set a header about that content using servlet filter. I Can capture the content but I always get an error that the response has already been ...
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When I tried doing research on this, everything I found was how to debug an application running under Tomcat. I'm trying to debug Tomcat itself, because something strange is happening that I can't ...
Thom's user avatar
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I manage a Tomcat/JSP webapp. We are updating our source code to conform to the recent javax -> jakarta namespace change in ...
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1. System Setup Framework: Spring Boot REST API (servlet-based). Global Exception Handler: Uses @RestControllerAdvice to catch ...
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I have an older Java/JSP application that I have to update to Tomcat 10 by May 31, 2025. This change in Tomcat versions covers Java's recent javax -> jakarta ...
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I'm building an Expense Tracker web app using Java Servlets and MongoDB. I want to filter expense documents based on user and ...
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Summary We're seeing an intermittent IllegalArgumentException during HTTP response serialization using Spring Boot 3.4.2 on Kubernetes. The exact same image ...
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I'm developing a Spring Boot application (with Spring Security) and need to add default headers (specifically, Content-Type and Content-Length) to requests targeting the endpoint /api/v1/mpos/set-...
Roman Patrushev's user avatar
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I am trying to run a page using Vaadin 23, but I get index.html on any url My project uses: java version=17 spring-mvc version=5.3.20 apache tomcat version=8.5.85 But as a dependency manager on the ...
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This question was asked on Stack Overflow more than 12 years ago, and the answer was "No". Today, JSP is considered a deprecated technology, and Facelets has replaced it. However, my ...
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I'm working on a java servlet application on reset password function. The get method basically check a parameter email and check if the email valid. Then set the email as an attribute in the session. ...
Hibiki Supersanta's user avatar
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I am developing a Java 8 servlet to download a zipped resource. The file size can vary significantly, sometimes reaching up to 700MB. For testing, I am using a 350MB ZIP file. The expected behavior is ...
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I am a beginner when workign with servlets. I am creating a servlet, but after running it, I am getting this error. Can anyone help me to resolve this? ...
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Have a test servlet that connects to Mariadb jdbc connection. It's not finding the jar file that's in the WEB-INF/lib folder - the jdbc driver. If I save the jar file in catalina's lib folder, I get ...
dashman's user avatar
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I am facing issue in my app, " Caused by: java.lang.ClassNotFoundException: jakarta.servlet.SingleThreadModel". I am aware that this class has been deprecated and removed from jakarta....
Himanshu Gupta's user avatar
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I would like to customize Access token based on authorization code which is sent in the token endpoint reqeust. I am doing this as per spring boot Oauth2 documentation.Token customisation Specifically,...
stuckWithIt's user avatar
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I have a REST service in Spring and an api that blocks for some before starting a heavy task and then returning it to the client. I want to check that the client is still connected to the socket of ...
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We are migrating a Java EE 8 project to Jakarta EE 10, from Wildfly 26 to Wildfly 34, but WF 34 stopped to load annotated Servlets from dependency jars. Annotated Servlets (with ...
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enter image description here [enter image description here](https://i.sstatic.net/mLxE5RhD.png) I am using Eclipse IDE. it is a web dynamic project JSP Servlet and JSTL. Eclipse version: 2024-12 (4.34....
user29184944's user avatar
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My current situation is that I have a maven project which I'm deploying to Tomcat as a .war file. Part of my project contents are actually third-party frontend ...
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I'm working on a Servlet application using WebSocket with a Tomcat 10.1 server. My goal is to create a one-player (host) game via a WebSocket and allow other players to join this game in real time ...
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Here is form in JSP ...
Pravin Zugare's user avatar
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I am asked to create a e-commerce website for my school project. The frontend part will be developed using React. The backend part must be developed using Java where web application framework, e.g. ...
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I have made a java server locally, it works perfectly with mysql db connection, i choosed to deployed it on vercel and make from it requests both from postman and also from the interface of the web ...
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There is an error when I want to connect to a PostgreSQL database from a servlet connection, a ClassNotFoundException for the PostgreSQL driver, with some details about servlet. ...
mohammad taha's user avatar
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I am trying to send partyList from AddPartyServlet.java to addParty.jsp. Whenever ...
Paridhi's user avatar
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I want to set my servlet as default handler at "/" in my Tomcat embedded project but it always return a 404 error on navigator. But if I set an index.html in webapp it can return and I can ...
RAZANAKOLONA Erwan-Matthieu's user avatar
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I know that Tomcat 11 supports servlet spec 6.1, but does it support olders as well? Also, I'm not sure about the relationships between servlet specs and Spring versions. https://github.com/spring-...
Aivar's user avatar
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I use this code. After setting passwordChanged, when I click (first request) then it invalidates the session in ...
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issue Why do I get the response code 200 when request sent from Postman to Tomcat server in my project. but get 404 in another project? To my project HealthHelper ...
黃奕捷's user avatar
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My application does not use any servlet annotations. That I want skip the scanning for annotations. But it look like that Tomcat 11.0 ignore the ...
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What I do? I sent a GET request from Postman to Tomcat v9.0 with following data. ...
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I was working on a maven project in intellij-idea and for some reason decided to change my java language level to 15 from 8 and now it does not recognise the jakarta package that I imported. I tried ...
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I'm trying to implement OAuth2.0 in my Spring Boot backend service, but I'm encountering the following error when adding my SecurityConfig class: ...
yourandroidude 123's user avatar
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In Jakarta Servlet 6.1, how does one add a meta element to the response from a servlet? For example, in HTML5 we can specify a character encoding like this: ...
Basil Bourque's user avatar
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I'm developing a Java application, using Quarkus 2.13.8.Final. There is a simple endpoint, in which I'd use the HttpServletRequest instance: ...
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Huynh Ngoc Khanh K18 HCM's user avatar
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The official documentation describes what to do if you need to get both json and multipart data from a request: ...
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I am facing a weird issue on a Spring boot project where the body is not retrievable in the controller. This is a bit specific: I am using a bc tls psk scheme to talk to sim cards and it has been ...
maxime chevry's user avatar
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Here is the HTML code: ...
MINATO8622's user avatar
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I have a spring boot application with one rest api. Will deploy it in one linux server. And we have multiple java applications deployed in multiple linux servers calls that api. Whenever a request ...
Pavan G's user avatar
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I was trying to make a servlet for webapp, In INTELLIJ IDEA. While deploying there was no error but when the servlet is called in the web, it says "jakarta.servlet.ServletException: Error ...
siddhant agarwal's user avatar
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