Questions tagged as 'servlets'

Tagged questions
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answers

How to read a file inside a servlet from a jsp

I'm doing an application where I have to upload a file to the server, which I already did but I do not know how to read it inside a servlet and show its contents. This is the jsp: <h1>Subir archivos</h1> <form method="post" a...
asked by 29.05.2018 / 04:06
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Java: method that stores the parameters [closed]

I'm doing a DAO and I need to insert in two different tables in the BDs. I know I can do it with Autocommit . But the idea is to go through the different inserts as a parameter and use the Autocommit in the method.  The code simplif...
asked by 28.12.2017 / 17:58
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answer

Serve an image from Servlet 3.0 contentType="multipart / form-data"

Greetings community! I pose the following problem, I have an image in a BBDD (format bytea[] ) and I want to serve an answer to show that image in my HTML. I do not have routes or directories, just the image in the database. It looks som...
asked by 19.12.2017 / 17:28
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wait message in JAVA EE

I am developing my first web application with Java and I have a little doubt. I have my jsp file where I have my main page, my css and a servlet with which I perform the operations I need. Well, this servlet generates a file that it then returns...
asked by 12.06.2017 / 22:40
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HashMap prints weird characters

I am deploying a java servlet in Weblogic, but when invoking it from the browser: link prints me the hashmap with Special characters:    srjava.util.HashMap ' F loadFactorI thresholdxp? @ wtABDULsrjava.util.ArrayListx a IsizexpDwXsr)...
asked by 05.04.2017 / 19:00
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java.lang.NumberFormatException: null

I'm starting with Java Servlets doing a program with a login. I'm fine but when I click on the Login button I get this error    java.lang.NumberFormatException: null     java.lang.Integer.parseInt (Integer.java:542)     java.lang.Integer.pars...
asked by 17.04.2017 / 06:03
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jsp, servlets and jstl

I have a question about the use of jstl. In my project I'm using jstl, based on an example I found in the cloud. But I was surprised that it does not work properly for me, so I ask for your support. The problem is that the list I send from...
asked by 29.08.2016 / 09:00
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I do not enter the IF [duplicated]

Good I have a jsp that passes data to my servlet with ajax. This is my Script $(document).ready(function() { var dni = "00000r"; $.post('actionServlet', { }, function(responseText) { num: "1" $('#datos').html(resp...
asked by 08.08.2018 / 12:56
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Problem when creating a JSON from Servlet

Good, I want to go from a Servlet to a JavaScript a Json with the following data. A dealer has several orders assigned, so I want to pass the id and the position of the delivery person, along with the id and address of the o...
asked by 26.01.2017 / 16:00
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error when calling Servlet from index.jsp

Good afternoon, I have a problem calling a servlet from my index.jsp, inside the index I have a form    index.jsp <form action="ServletLogin" role="form" method="post" class="form-horizontal">...
asked by 29.11.2017 / 23:48