Spring file properties loader

PropertySourcesPlaceholderConfigurer is used from Spring framework 5. PropertyPlaceholderConfigurer class was used which is deprecated from Spring 5. For example there is a app. Notice how org. Environment is injected and that object is used to get properties. If app. If no default is specified and a property cannot be resolved, an IllegalArgumentException is thrown.

Active 10 years, 2 months ago. Viewed 35k times. Improve this question. Polaris Polaris Perhaps this related question gives some direction? Add a comment.

Active Oldest Votes. Improve this answer. Florin Florin 1 1 silver badge 2 2 bronze badges. Brian Agnew k 36 36 gold badges silver badges bronze badges. Bozho Bozho k gold badges silver badges bronze badges. Is there also a way to grab the property programatically instead of using the annotation with Spring Expression syntax? Yes - static. As you can see, the Resource interface extends the InputStreamSource interface. Some of the important methods of the Resource interface are:.

Spring provides several implementations for the Resource interface:. It has the showResourceDataUsingFilePath method, which contains the getResource method to load a text file from the path provided. We can specify different prefixes for creating a path to load resources from different locations.

In conclusion, all the above examples will load the resource file from their location. You can choose the implementation that fits your requirements.

We looked at example implementations for loading resources present at:. You can download the complete source code of this post from GitHub. See the original article here.

Thanks for visiting DZone today,. Edit Profile. Sign Out View Profile. Over 2 million developers have joined DZone. Working With Resources in Spring. Learn how to use the ResourceLoader in your Spring apps. Actually PropertySource annotation adds a PropertySource to Spring's Environment so that can be used to make your code simpler.

In that case you just need to Autowire or Inject Environment into your Config class and use Environment object to get property value. In cases where a given property key exists in more than one. For example, given two properties files a. The override ordering depends on the order these classes are registered with the application context.

In case your properties file is optional and you don't want exception to be thrown if it doesn't exist you can use ignoreResourceNotFound attribute and set it as true.