photo credit: Shandi-lee

In the previous part, we set up a little request flow that used Spring MVC to define a request mapping into our DOC system, and provide the user with a list of tramps retrieved from the a service. We also hooked it all up together nicely as components (using the @Controller and @Service Spring Stereotypes) – so they all play together seamlessly.
In this part we’ll get our tramps web application to read tramps information …

photo credit: Lampeduza

Request mapping with Spring MVC 3.1 is quite sophisticated, and lets you use quite a few neat tricks. The following are two particularly tricky bits that are not very straight-forward to get directly from the documentation:

Map to the root of the controller mapping

It is there in the documentation, but isn’t immediately clear.Suppose you have a controller with a root @RequestMapping like so:

To add a new National Park to the system you’ll hit the …

photo credit: Illusive Photography

Baa.. took a lot of searching in code, and I don’t particularly like the result – but it is what it is. The main issue is that my designer wanted us to get clever with how form validation error messages are displayed to the user. the <form:errorstag is very useful for most cases – where you basically only want to display the errors to the users, perhaps with a specific class in mind. You can …

photo credit: Vineet Radhakrishnan

Ok, I finally got around to do this. Sorry for the wait, but I was pre-occupied with, well – life, work and everything in between.

In the first part of this tutorial, I walked through setting STS up, and dealing with the default project you create with the Spring-MVC template. In this part – I want to try and go a bit deeper – so I’ll touch a bit on mapping requests and on displaying …

photo credit: greekadman

In a previous post about Spring MVC I touched briefly about the DispatcherServlet and what it means for Spring-MVC.

In this post I am going to dive a bit deeper into the the DispatcherServlet and how Spring MVC uses it.

It is probably a good idea to have a read of the previous post before you read this one, but it isn’t absolutely necessary.

Spring is a Dependency Injection (DI) framework. In short this means that …

photo credit: martinak15

Sometimes issues jump at you from a completely unexpected place. One moment you’re basking in the peculiar March sunny day, and the next you’re puzzling about why people choose a specific Linux distro, or why do script kiddies insist on trying to break where they shouldn’t…

Looking through a client’s Apache logs the other day I discovered the following:

photo credit: Stuck in Customs

This is an ongoing list, which is more of a “Remember that when…” thing for me.You’re welcome to add in the comments.

unsupported format character ; (0x3b)

This is usually when you have a CSS directive on an element. e.g.

DTML uses the % sign to escape characters – like using %s to insert a string. Therefore it is trying to parse %; and fails.

Solution:

Escape the % sign by doubling it:…

photo credit: Or Hiltch

This took a whole day for me. Hopefully I can save you the pain. I added quite a few possible search terms here for maximum coverage, so the text may get a bit repetitive. I mean – when I tried to look for a solution, I didn’t even know what to look for – so I tried googling for every symptom I saw, to no avail.

The deal was this: my page has a very large …

photo credit: Mr. Theklan

Double submit is when a user submits a form on your web page twice (well, technically they can do it more than twice, but you can’t call it a double submit…)

It usually happens when your user double-clicks your Submit button instead of clicking it, but may also happen in two other popular scenarios: your buttons do not provide the user with a visual feedback of being clicked (e.g. when you use an image as your …

photo credit: johnb/Derbys/uk

In one of my projects, I have several customers all served from the same CakePHP application. This is by no means unique, and is a very well understood pattern of maintaining co-exiting websites. In my set up, each of the customers has their own website, with their own data and design, but there is only one copy of the actual application behind all those websites. This is, of course, a fundamental attribute of selling SaaS.

From a …