在 Spring Security 中将 List<Authority> 转换为 Collection<GrantedAuthority>

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.AuthorityUtils;
import java.util.List;

public class AuthorityConverter {
    public static void main(String[] args) {
        List<Authority> authorities = new ArrayList<>();
        authorities.add(new Authority("ROLE_ADMIN"));
        authorities.add(new Authority("ROLE_USER"));

        Collection<GrantedAuthority> grantedAuthorities = AuthorityUtils.createAuthorityList(authorities.toArray(new Authority[0]));

        grantedAuthorities.forEach(grantedAuthority -> System.out.println(grantedAuthority.getAuthority()));
    }
}