If you have packaged a web application within a .war file, then you might want to check the contents of it for various reasons. There are a number of tools that can do this, but I am going to show you a simple command that can display the contents of the war file within the… read more
Need to pass a date as a java.util.Date instance in a Spring MVC controller action? Then you have come to the right place. You might have tried the below approach and encountered a good old 404 Not Found error. @Controller public class CompanyController { @RequestMapping("/company/added-since/{since}") public String showAddedSince(@PathVariable("since") Date since) { return "companies-added-since"; } }… read more
There are quite a few approaches to validating whether or not a given value already exists in a data store or not. In this article, I will show my solution to this problem by using Hibernate Validator in combination with Spring Framework. As you will see, the latter is solely used for injecting a dependency into… read more
Okay folks, this is going to be a short one! Sometimes you may want to reset a PostgreSQL sequence, for instance after removing data from a tabel. You can do this very easily by executing the following statement: ALTER SEQUENCE company_id_seq RESTART WITH 1; company_id_seq is the name of the sequence that you want to… read more
If you are trying to bind a Spring MVC form to a bean, then you might have come across the below exception. Neither BindingResult nor plain target object for bean name ‘mybean’ available as request attribute Some tutorials claim that you can do like this: @Controller public class PersonController { @RequestMapping(value = "/person/add", method =… read more
Sometimes you may want to return an empty JSON object from a Spring Framework controller action, be it in a REST API or just a regular controller action. This could for example be the case if you are issuing an AJAX request from jQuery; if you specify the data type to be JSON, the success handler… read more
As always, there are many ways to accomplish this. My approach is based on Homebrew and assumes that you have it installed. If not, then the first thing you have to do is to install it. Installing nginx on OS X To install nginx, simply open up the Terminal and enter the following command. brew… read more
Generally speaking, view helpers should not be used within controllers, as the name suggests. Certain situations may, however, require one to do so. This article shows you just how to do that by fetching the view helper manager from the service manager. It is actually very simple. public function someAction() { $userData = ‘User data… read more
In a view script in Zend Framework 2, one may need to generate an URL for a given route that includes one or more query parameters. For instance, when browsing through a paginated data set, one may want a form’s action attribute to point to the current page, such that the user will end on… read more
As with any PHP extension, the mcrypt extension can be a bit tricky to install. This guide is meant to simplify this task, and most of the work will be done in the Terminal. Before beginning, please ensure that you have Xcode installed, which can be found in the App Store as well as the… read more