Questions tagged as 'java'

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How can I generate a pdf with jasperReport from the controller?

I just start in this and I do not know how to implement a pdf, I'm using mvc spring, I already have a format made with iReport, now what I want is to visualize it in my jsp so I can download it, but how do I do it? Does anyone have a code tha...
asked by 28.09.2018 / 04:41
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Fixing Java Bytes

in advance thank you for your attention, I want to convert a url in the default I have hosted the photos of several users in an array of bytes and then that photo lodge it in my report of biographical data sheet per user.     
asked by 28.09.2018 / 00:07
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Extract item from a list in Java

I have the following list [{0 = 1.1 = Test0}, {0 = 2.1 = Test1}], and what I am trying to do is extract only the elements Test0 and Test1 using a foreach. Thank you in advance.     
asked by 29.09.2018 / 16:41
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Call Oracle data to a NetBeans Table [closed]

I would like help on this topic, because I really do not know how to do it. My question is, I have a form in my NetBeans and when I click on the button I should pull the data that I have in my Oracle and show them in the table I have there .....
asked by 29.09.2018 / 17:30
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Filtering Problems with Java Date

I'm trying to filter results with Java in date format, I'm not allowed to use Select to find the results, that's why it's getting complicated ... The problem is that I always get into the if and it keeps the objects in the array, although "my...
asked by 28.09.2018 / 09:12
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Problem with Arrays (student)

I am a student and I can not make this code work. I think the problem comes with the handling of Arrays but I can not find out why it does not work. public class A1IntroduirDNI { static int MAXDNI = 10; String[] dniLista = new String...
asked by 27.09.2018 / 16:38
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Base document does not exist or is not a readable directory

Hi, I'm looking at a tutorial and when I run the server I get the following error:    The Base Document   C: \ work \ SpringMVCSignupLoginPasswordEncoder \ target \ SpringMVCSignupLoginPasswordEncoder-0.0.1-SNAPSHOT   does not exist or is not...
asked by 26.09.2018 / 17:19
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What is the solution to all present, past and future NullPointerException errors?

I have my Java program and I get a NullPointerException and I have seen other questions but they are from people with other programs and it does not work for my program and I want to leave here the 2,000 lines of my program so that you solve the...
asked by 08.01.2017 / 18:54
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Show a date that entered in JText from Java and that is stored in SQL

I would not be able to enter a date of birth in my program to fill out a file of a client and save it in the sql database from xampp, I could do it as a string but obviously it does not take the bars "/ " I want to directly load the date and sav...
asked by 06.10.2018 / 16:53
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Problem JasperReport Netbeans and Oracle

Good I am new here but I wanted to ask you for help if someone already had a similar problem. It turns out that I downloaded a sales system made in Java (Netbeans) that was connected to MySql, this to reports with Japser, everything worked OK...
asked by 01.10.2018 / 22:13