Is it possible to read YAML property into Map using Spring and @Value annotation

问题

What I want to be able to do is:

YAML:

features:
    feature1: true
    feature2: false
    feature3: true

Code:

@Value("${features}")
private Map<String,Boolean> features;

I can't figure out what Spring scripting syntax to use to do this (if it's possible at all)

回答1:

I'm using Spring Boot and access custom variables like this:

1. Create a custom class that maps to your custom properties:

   @Component
   @ConfigurationProperties(prefix="features")
   public class ConstantProperties {
       private String feature1;
   
       public String getFeature1(){
           return feature1;
       }
       public void setFeature1(String feature1) {
           this.feature1 = feature1;
       }
   }
   

2. YAML file will look like this:

   features:
     feature1: true
     feature2: false
     feature3: true
   

3. in your class that you want to access these properties, you can use the following:

   @Autowire 
   private ConfigurationProperties configurationProperties;
   

4. Then to access in that class, use the following syntax:

   configurationProperties.getFeature1();
   

5. Or you can reference the custom property like:

   "{{features.feature1}}"
   

来源：https://stackoverflow.com/questions/46574149/is-it-possible-to-read-yaml-property-into-map-using-spring-and-value-annotation