Can't access database to save information from jsp page [duplicate]
The stack trace is as follows:Stacktrace: org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:478) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)...
View ArticleHow to write to HttpServletResponse using OutputStream
My method is acquiring HttpServletResponse from previous method to which I do not have access.When using HttpServletResponse::reset() I'm able to write my .zip content to this response with...
View ArticleHow to update the resource property using the valuemap in the Sling servlet?
I’m getting all the pages,taking the jcr:content of all the pages as resource and trying to update the pageTitle property using valueMap by adapting ValueMap to resource, But I’mgetting...
View ArticleHttp Servlet request lose params from POST body after read it once
I'm trying to access two http request parameters in a Java Servlet filter, nothing new here, but was surprised to find that the parameters have already been consumed! Because of this, they are not...
View ArticleBest Practice to skip URL pattern's from getting applied servlet filter...
What could be the best practice for Excluding a list of URL patterns from below servlet filter?Use case: Create a whitelist of URLs that could be skipped through the below Http servlet...
View ArticleHow to communicate with a MySQL database in Java Web application [closed]
I am new in the Java world. I have a web app which is not communicating with MySQL db. I created a test Java program and I could easily get the data in my DB, however, using the same code in my DAO...
View ArticleTesting email contact form with JWebUnit without sending the email
I have a Java web application built using servlet and JSP pages. I have written some integration tests using JWebUnit (http://jwebunit.sourceforge.net).I have a test method like this:@Testpublic void...
View Articlenot able to docker:exec and start my tomcat in same command
I've been trying to start my Tomcat server and run a mvn exec command as a CMD statement in my Dockerfile, but I'm running into the following error, and not able to figure it out:Error: Could not find...
View ArticleProxy regular HTTP and WebSocket via Tomcat servlet
I'm implementing a web application which, among other things, has to show and interact with webpages proxied to backend services. For this, I'm using the HTTP-Proxy-Servlet which works well most of the...
View ArticleHTTP headers encoding/decoding in Java
A custom HTTP header is being passed to a Servlet application for authentication purposes. The header value must be able to contain accents and other non-ASCII characters, so must be in a certain...
View ArticleAttribute must be declared and The content of element type must match
I have been trying to figure out how to start my weblogic server with my servlet project with maven for three days, but I find that it is giving me errors with the web.xml. I have a colleague who...
View Articlerequest.setCharacterEncoding is not working, and I don't know why
The server is a jsp, and I sent the following request via curlcurl -X POST 'http://localhost:8080/test.jsp' --header 'Content-Type: application/x-www-form-urlencoded' -d 'name=%B9%DA%C1%D8%BF%B5'The...
View ArticleCan't inject EntityManager using @PersistenceContext
Please help with my code, why EntityManager and UserTransaction is always not injected, it's always null.UserDAOImpl.javapackage dao.implement;import dao.UserDAO;import java.util.List;import...
View Articlerequest.setCharaterEncoding doesn't work on x-www-form-urlencoded [duplicate]
The server is a jsp, and I sent the following request via curlcurl -X POST 'http://localhost:8080/test.jsp' --header 'Content-Type: application/x-www-form-urlencoded' -d 'name=%B9%DA%C1%D8%BF%B5'The...
View Articlejava.lang.IllegalArgumentException: The main resource set specified [...] is...
I'm having trouble starting my Tomcat server, it used to work, but I did something wrong and now it throws me this exception:Caused by: java.lang.IllegalArgumentException: The main resource set...
View Article`Cannot invoke "String.startsWith(String)" because "className" is null`...
I am new to using java servlet and I want to implement a filter for users to authenticate with SAML protocol. The java code of the functions init() and doFilter is as follows public void...
View Articlerequest.getParameter returns null in jsp/ servlet
request.getParameter returns null in servlet dopost method. i have checked http request its sending correct value. i have verified this in chrome network tab, but in servlet the value for...
View ArticleHow to show users connected using authentication and java websocket in Java...
I am developing a web application using Java EE. I want the application to display all users currently connected as soon as a user is authenticated. However, I am encountering an issue where, upon user...
View ArticleHow can I use producer consumer in servlet? [closed]
As an exercise, I want all the servlet requests to be queued, and through the use of thread, the problem of cosumer/producer is actually implemented.The problem I have now is that :Is the whole code...
View ArticleIs it possible to get the cookie value over the application?
I got a different requirement which I haven't tried before. Let's say I have two web applications which will run on same browser with localhost as a host. Can it possible to set the cookie value in my...
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