Code Recipes Blog

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;
11 import java.util.Map;
12 
13 @Configuration
14 @ComponentScan(basePackages = "spel.package3")
15 public class Example3 {
16     @Value("#{numberToMonthMap[1]}")
17     private String month;
18 
19     public String getMonth() {
20         return month;
21     }
22 
23     @Bean
24     public Map<Integer, String> numberToMonthMap() {
25         Map<Integer, String> numberToMonthMap = new HashMap<>(0);
26         numberToMonthMap.put(1, "January");
27         numberToMonthMap.put(2, "Febraury");
28         numberToMonthMap.put(3, "March");
29         return numberToMonthMap;
30     }
31 
32     public static void main(String[] args) {
33         ApplicationContext applicationContext = new AnnotationConfigApplicationContext(Example3.class);
34         Example3 example3 = applicationContext.getBean(Example3.class);
35         System.out.println(example3.getMonth());
36     }
37 }

In the above code at line 16, I create an SpEL which accesses the map, get the value of key “1” and set the “month” instance variable of “Example3” class to “January”.

In this way we can access a map in SpEL.