Questions tagged as 'java-ee'

Tagged questions
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JSF error: javax.el.PropertyNotWritableException

I have an error that I can not solve and I do not know the reason for the following error and my classes and view below. type Exception report messageInternal Server Error descriptionThe server encountered an internal error that prevented it...
asked by 30.11.2017 / 21:19
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Error Returning Query Using Like

I'm trying to do a jpql query with like using JPA. However, it is not working. UserRepository class public class UsuarioRepository extends RepositorioGenerico<Integer, Usuario> { public UsuarioRepository() { super(Usuar...
asked by 14.11.2017 / 19:35
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Servlet JSP does not work

I have the following error in eclipse when running a servlet:    HTTP Status 404 - / TestJSP / web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java...
asked by 28.11.2017 / 17:36
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Deploy to heroku after reinstalling Ubuntu

Good afternoon! I needed to reinstall Ubuntu on my machine, and it was because of it that I was deploying to the heroku. But now that I've reinstalled everything I can no longer deploy. I cloned the git project and managed to push the remote...
asked by 11.07.2017 / 22:14
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How can I get values from several selected checkboxes and send them as a List to the Spring MVC?

Alright? I'm having a question, I'm developing a system using Spring MVC and HTML 5 in View, and as a renderer I'm using thymeleaf. I'm trying to get all the selected values from a checkbox set that represent the days of the week: Monday, Tue...
asked by 24.01.2017 / 21:13
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Java Poi does not download

I'm using the poi 3.15 library to generate excel on a web system, but I'm having a hard time downloading the file locally, but when I do it does nothing. I put it in the beginning like this: String caminho = System.getProperty("user.home");...
asked by 14.02.2017 / 22:11
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Injection dependency failure [duplicate]

I'm new to the Hibernate world and when I run this application, I get the following exception (error is relative to EntityManager persist): java.lang.NullPointerException Caused by: java.lang.NullPointerException at com.nataniel.a...
asked by 27.11.2016 / 03:27
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Java Framework for Ecommerce Website Style

Good evening! I would like the opinion of those who are active on the most appropriate framework for developing an E-commerce site using java. I was thinking of JSF 2 + Primefaces but I believe JSF is more geared towards corporate applicat...
asked by 07.10.2016 / 23:08
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How to update a h: form every 30 seconds JAVA WEB

I'm trying to create a dashboard showing the sellers' results on a big screen in my company. I need to timer the panel every 30 seconds so the results are always up to date. I have no idea how to do it, all help is welcome.     
asked by 26.08.2016 / 16:03
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Pass user authentication between different contexts

I have three java web (.war) projects with different contexts within the same EAR. I need the user to authenticate in an application and then I traffic this information between the other projects. Searching a little I found some well-designed...
asked by 13.04.2016 / 15:35