Questions tagged as 'java'

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block second tab from the same user session with JSF

I have a problem. How do I not allow two-tab access in the same session using JSF. I have a web system where each user has their profile. And the profile is used to generate custom forms. After confirming the profile I no longer allow the nam...
asked by 29.01.2018 / 14:15
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Could not read entity state from ResultSet EntityKey OneToMany composite keys

I'm having problems in the oneToMany relationship of two entities using Jpa Hibernate. I have two tables, one cancellation and another that has the orders that are part of the cancellation. The cancellation table has a simple primary key (idc...
asked by 02.02.2018 / 17:56
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How to differentiate the sessions in the browser tabs?

In a web application implemented in Java using JSP and Servlets, if I store information in the user session, this information is shared from all the tabs of the same browser. How to differentiate sessions from browser tabs? In this example:...
asked by 08.01.2018 / 18:58
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Apache POI - How to put Hyperlink in an image in Excel?

This is the method I use to put images in Excel: public void insertIcons(String URL, Sheet sheet, int colBegin, int colEnd, int rowBegin, int rowEnd) { try { InputStream iconInput = new FileInputStream(URL); byte[] byteTran...
asked by 07.01.2018 / 19:28
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Mapping HIbernate Embeddable

Good morning! I have a question regarding the mapping of composite keys. The situation is as follows: I have a class whose primary key is made up of two other classes, but I have a third class that the third key is a compound of the oth...
asked by 09.01.2018 / 12:07
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I can not save photo in the bank

I am creating a web application that makes the employee registration, and in this register there is an option to upload a photo to link to the profile, but when registering, it arrives null in the bank. Can anyone help me? This is my entity:...
asked by 05.01.2018 / 15:24
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Web Service Return is a string, how can I query the data?

I'm consuming a Web Service, it follows the JAVA code (JSP): <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <%-- start web service invocation --%><hr/> <% try { com.totvs.framework.ws.execbo....
asked by 15.12.2017 / 12:23
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WebService Jersey REST Not Found

I have the following problem: when I run my jersey server and type the url mapped in web.xml the following error appears. MyPOM.XML<projectxmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"...
asked by 16.12.2017 / 21:42
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How to check the size of an array of type PFA?

How do I check to see if the array PFA (Partially-full array) is full and new elements can not be added? If it is full, it should return true . boolean estaCheio(int[] data, int size){ ??? } I have 5 possible options. I belie...
asked by 28.11.2017 / 06:31
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Select join with JPQL

Talk the guys! I'm grating here in my TCC and need some help. I know the problem that I am must be very silly, but I do not have much knowledge. I searched everywhere, JPQL documentation and everything, but I could not solve it. I need to log...
asked by 24.11.2017 / 00:07