Tagged Questions

Servlet is a Java application programming interface (API) running on the server machine which can intercept on the requests made by the client and can generate/send a response accordingly.

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6
votes
1answer
78 views

Entering information about a business and finding matches

I'm writing a Java Servlet application where the users must enter information about a business. I'd like to prevent as many duplicate entries in the MySQL database as possible and I'd appreciate ...
0
votes
2answers
55 views

Elegant way to handle errors with JSP and Servlets (Model 2)

I have a form that submits to a registration Servlet, which inserts a new user to the database when they sign up to the web application. Depending on the erroneous user input, the Servlet will ...
4
votes
1answer
62 views

Error Handling in Servlets and JSPs

I have an HTML login form that is processed by a servlet, which then redirects the user to a result page. login.jsp: ...
5
votes
3answers
201 views

Catching NullPointerException in Servlets

I have a servlet that processes user registration to a website. It takes inputs from an HTML form like username, password, email, etc. MySQL Table: ...
2
votes
1answer
33 views

Servlet WebClient: How do I best solve for multiple servlet requests?

This is working code presently visible here. Basically, this is still a work in process, but I do not want to go much further down the road without peer review. I've limited the source to the servlet. ...
4
votes
3answers
84 views

Unit testing a servlet in a meaningful way

I have to write a unit test for the method processRequest in the servlet below and I'm wondering if: It just shouldn't be done. The class should be rewritten / ...
5
votes
1answer
311 views

Single Sign On - SAML Response generation

I am trying to implement a IDP initiated Single Sign On Solution (service similar to onelogin's) to Cloud based Service providers such as Google Apps, Salesforce etc. The project is a Maven eclipse ...
2
votes
1answer
115 views

Mutualising multi-threaded calls to EJB from Servlet

I have a Servlet that makes an EJB call to a backing server which takes about a second to return some data that changes reasonably regularly. I can't cache the data on the servlet-side, so I have ...
8
votes
2answers
235 views

Simple servlet code to sum digits

This servlet takes an input from the user and Stores the number inside the bean but with spaces in between each digit then stores the bean in the request scope. If the last digit is even, sums the ...
8
votes
2answers
514 views

MVC controller code

Please review my servlet. ...
6
votes
2answers
639 views

Implement HTTP Server with persistent connection

I am trying to implement a HTTP Server in Java, I want the server to use a persistent connection per thread for request and response. After some research on Google, this is how my program looks like. ...
7
votes
2answers
217 views

Servlet for querying database on some high-loaded system

What should the code do: Process client HTML requests, query database and return the answer in XML. Working with a high load. I need to know how can it be optimized. Is something terribly wrong with ...
0
votes
1answer
393 views

Please check my example about jquery autocomple with servlet [closed]

Please check my code, did i get some things wrong I'm a newbie in jquery and ajax, please check and show me how to fix this In jsp page : ...
-2
votes
1answer
1k views

file downloading using jsp but not readable [closed]

I am trying to download files using jsp but then downloaded files are not readable. Suppose if i download pdf files then it can not opened,if i download jpg files then it can not opened and similarily ...
0
votes
1answer
166 views

How can I tidy up this servlet parameter check code?

One of the servlet in my web app takes parameters in the form www.service.com/servletname/parameter1/parameter2. The first parameter is required and the second ...
2
votes
1answer
268 views

Am I using appropriate methods in this login system?

I have had to do a crash course in JSP, Servlets, and JDBC. I decided to attempt a Login System. I'm unsure if my use of try/catch is appropriate and if I am closing database connections correctly. ...
1
vote
2answers
589 views

Correct implementation for background task execution in web application?

I have a simple servlet which merely serves some cached data back to the user. I also have a background thread which runs at fixed intervals to refresh the cached data. Is this a reasonable ...
2
votes
1answer
679 views

Tomcat/JSP/servlets web-project refactoring advices needed

I am a newbie to JSP/servlets/java, studying it atm. So I've made my first project. It's a simple sort of array. Array (in fact I used ArrayList) is stored in ...
1
vote
2answers
293 views

Is there a more efficient way of loading views within my java app?

I'm building a web application in Java. I'm new to Java, so before I get too far into this... I'm hoping to take advantage of all the experience here and learn the problems with this setup. My ...