Spring Boot: read list from yaml using @Value or @ConfigurationProperties

Question

I want to read a list of hosts from a yaml file (application.yml), the file looks like this:

cors:
    hosts:
        allow: 
            - http://foo1/
             


        

Answer 1

It's easy, the answer is in this doc and also in this one

So, you have a yaml like this:

cors:
    hosts:
        allow: 
            - http://foo1/
            - http://foo2/
            - http://foo3/

Then you first bind the data

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

import java.util.List;

@Component
@ConfigurationProperties(prefix="cors.hosts")
public class AllowedHosts {
    private List<String> HostNames; //You can also bind more type-safe objects
}

Then in another component you just do

@Autowired
private AllowedHosts allowedHosts;

And you are done!

Answer 2

I met the same problem, But solved, give you my solution

exclude-url: >
  /management/logout,
  /management/user/login,
  /partner/logout,
  /partner/user/login

success in the version of Spring boot 2.1.6.RELEASE

Answer 3

I have been able to read list from properties like below way-

Properties-

cors.hosts.allow[0]=host-0
cors.hosts.allow[1]=host-1

Read property-

@ConfigurationProperties("cors.hosts")
public class ReadProperties {
    private List<String> allow;

    public List<String> getAllow() {
       return allow;
    }
    public void setAllow(List<String> allow) {
        this.allow = allow;
    }
}

Answer 4

use comma separated values in application.yml

corsHostsAllow: http://foo1/, http://foo2/, http://foo3/

java code for access

@Value("${corsHostsAllow}")    
String[] corsHostsAllow

I tried and succeeded ;)