[FIXED] How to read property as List<String> from [] in springboot

Issue

Sometime i see somebody define like this in property file:

spring.autoconfigure.exclude[0]=com.vietnam.AAutoConfiguration
spring.autoconfigure.exclude[1]=com.vietnam.BAutoConfiguration

just question: how to define a property in Spring bean to collect this config as list? in other place they said to use like this: in propery:

spring.autoconfigure.exclude=com.vietnam.AAutoConfiguration,com.vietnam.BAutoConfiguration

in spring bean

@Value("#{'${spring.autoconfigure.exclude}'.split(',')}"

But i dont like this way in case the value is long. one config per line would be easier to read and mantain

Thanks

Solution

i found the way, use @Value will not support case i want. We need to use @ConfigurationProperties then Spring will collect property as list

@ConfigurationProperties(prefix = "spring.autoconfigure")
public class SpringConfig {
  @Setter //lombok
  private List<String> exclude;
}

Config will simple like:

spring.autoconfigure.exclude[0]=com.vietnam.AAutoConfiguration
spring.autoconfigure.exclude[1]=com.vietnam.BAutoConfiguration

Answered By - uncle bob
Answer Checked By - Katrina (JavaFixing Volunteer)