In this post under Spring SpEL, I will show with example how to access map in SpEL. For our example I will create the below main class Main class 1 package spel.package3; 2 3 import org.springframework.beans.factory.annotation.Value; 4 import org.springframework.context.ApplicationContext; 5 import org.springframework.context.annotation.AnnotationConfigApplicationContext; 6 import org.springframework.context.annotation.Bean; 7 import org.springframework.context.annotation.ComponentScan; 8 import org.springframework.context.annotation.Configuration; 9 10 import java.util.HashMap;…… Continue reading Accessing map in SpEL
Category: Spring Framework
Accessing array in SpEL
In this post under Spring SpEL, I will show how to access array elements in SpEL expressions. For our example I will use the two beans. Below is the class structure of them Bean1 class package spel.package2; import org.springframework.stereotype.Component; @Component public class Bean1 { private int[] values = new int[] {1, 2, 3, 4}; public…… Continue reading Accessing array in SpEL
SpEL Simple example
In this post under Spring SpEL, I will give a simple example that shows how to access bean properties and use literal values in SpEL expressions. SpEL (Spring Expression Language) is an expression language that supports querying and manipulating objects at runtime. This expression language is written within “${ and “}” when used inside annotation…… Continue reading SpEL Simple example
Spring @Value annotation
In this post under Spring Core, I will show with example how to use “@Value” annotation. In previous post I showed how to access system properties, environment properties, custom properties using “Environment” interface. In all these case we had to explicitly retrieve the value as shown below and are not injected into the bean automatically…… Continue reading Spring @Value annotation
Configuring access to multiple custom property files
In this post under Spring Core, I will show with example how to configure access to multiple custom property files. In the previous post, I showed with example how to configure access to single custom property file. In real world scenario they wouldn’t be a situation where we need access to only one custom property…… Continue reading Configuring access to multiple custom property files
Configuring access to custom property file
In this post under Spring Core, I will show with example how to configure access to custom property file. In the last blog I showed with example how to access system and environment properties. But those are not the only properties that we need access to. We developers also need access to properties created by…… Continue reading Configuring access to custom property file
Accessing system and environment properties
In this post under Spring Core, I will explain with example how to access system and environment properties. To read system and environment properties we take help of Spring’s “Environment” interface. The approaches to access system and environment properties are different but the “Environment” interface hides that implementation detail and provides a single interface through…… Continue reading Accessing system and environment properties
Ordering Application Event listener
In my previous post under Spring Core, I showed you guys, how to listed to application events, how to create and publish our own application event, and how to associate multiple event listeners to one particular event. In this post under Spring Core, I will show with example how to order multiple application event listener…… Continue reading Ordering Application Event listener
Chaining multiple application event listener
In previous post under Spring Core, I showed1) how to listen for events generated from application context2) how to generate and listen for custom application event. In this post, I will show with example how to chain multiple event listener for a particular application event For our example, I will take “ContextStoppedEvent” event which is…… Continue reading Chaining multiple application event listener
Generating Custom application events
In this post under Spring Core, I will show with example how to create custom application events. For our example, I created a custom event that the application will generate as shown below CustomEvent package package32; import org.springframework.context.ApplicationEvent; public class CustomEvent extends ApplicationEvent { public CustomEvent(Object source) { super(source); } } In the above code,…… Continue reading Generating Custom application events
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