1. // 自定义Realm
    2. public class CustomerRealm extends AuthorizingRealm {
    3.     @Override
    4.     protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
    5.         return null;
    6.     }
    8.     @Override
    9.     protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
    10.         System.out.println("======================");
    11.         String principal = (String) authenticationToken.getPrincipal();
    12.         if("Jack".equals(principal)){
    13.             return new SimpleAuthenticationInfo(principal,"123",this.getName());
    14.         }
    15.         return null;
    16.     }
    17. }