Code Recipes Blog

In this post under Spring SpEL, I will show with example how to access list in SpEL.

For our example I will create the below main class

Main class

1  package spel.package4;
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.stereotype.Component;
9  
10 import java.util.ArrayList;
11 import java.util.List;
12 
13 @Configuration
14 @ComponentScan(basePackages = "spel.package4")
15 public class Example4 {
16     @Value("#{colorList[1]}")
17     private String rgbComposition;
18 
19     @Bean
20     public List<String> colorList() {
21         List<String> rgbComositionList = new ArrayList<>(0);
22         rgbComositionList.add("10, 90, 200");
23         rgbComositionList.add("50, 100, 90");
24         return rgbComositionList;
25     }
26 
27     public String getRgbComposition() {
28         return rgbComposition;
29     }
30 
31     public void setRgbComposition(String rgbComposition) {
32         this.rgbComposition = rgbComposition;
33     }
34 
35     public static void main(String[] args) {
36         ApplicationContext applicationContext = new AnnotationConfigApplicationContext(Example4.class);
37         Example4 example4 = applicationContext.getBean(Example4.class);
38         System.out.println(example4.getRgbComposition());
39     }
40 }

In the above code at line 16, I create an SpEL which accesses the list “colorList”, gets the value at index 1 and set the “rgbComposition” instance variable of “Example4” class to “50, 100, 90”.

In this way we can access a list in SpEL.