I am trying to replace in an existing application the embedded web server with Undertow as the old does not work correctly in some cases. The embedded web server is used to server a few simple servlets. My main problem is that I can’t find a way to register an existing HttpServlet instance in Undertow. …
Tag: servlets
Servlet encoding woes in Open Liberty
I have a simple test servlet that should output a non ASCII character (right single quotation mark – ’). In Tomcat, it works, but in Liberty I get junk. Is this a bug in Liberty, am I doing it wrong, or a config issue? and the web.xml From Tomcat the response is (courtesy of Fiddler): The body hex is: E…
Jetty 11 Doesn’t Detect Jakarta Servlets
This is a follow up to this question. I don’t think it’s a duplicate because the accepted answer indicates that Jetty 11 doesn’t work with javax servlets, but I’m asking why Jetty 11 doesn’t work with jakarta servlets. I have an example project here that uses Jetty 9 to deploy a …
What are the advantages to use servlet mapping for web application development at a high level architecture point of view? [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 11 months ago. Improve this question This question is meant to be answered from a high level architectur…
java.lang.NumberFormatException: null with error status 500
I faced issue with submitting data from html to servlet Can’t This is my html file this is the servlet file for getting the data error: HTTP Status 500 – Internal Server Error Type Exception Report Message null Description The server encountered an unexpected condition that prevented it from fulfilling …
Do session objects take resources in my application? Won’t garbage collector remove them?
I came across part in Head First JSP and Servlets page:241 where it says that we have to get rid of sessions as shown in this picture: Later on they present methods invalidate() and …
Redirect to certain page upon clicking “OK”
My Servlet – “ImportFile”: doPost(){ … … PrintWriter out = response.getWriter(); response.setContentType(“text/html”); …
Tomcat. ClassNotFoundException on importing class
I am writing my training project on Tomcat based java servlets and jsp’s using Visual Studio Code. Now I am working on logging. My project structure looks like this: Class AccessFilter.java realizes logging system. Here is code of AccessFilter.java: Code of Log.java: package FamilyTask.lib; Command for …
Reading Excel File Column in Java
I have a sample of Excel data that needs to be read and store in the database. Example: I have tried to use Apache POI in reading data by row. But how do I get the Name and the amount from the column at the same time? Something like this Any help would be appreciated. Thanks Answer Result:
How do I get the Client Hostname and/or client IP address from within a Spring Boot application in Elastic Beanstalk?
I have a Spring Boot application deployed in AWS Elastic Beanstalk. For one of my APIs, I am need to check the client hostname address. I am using (where request is a HttpServletRequest). I know that the HTTP spec and the Java servlet spec both say that both of these values may be absent. However, I am seeing…