@Service
public class LDAPSearchService {
private static final Integer TIME_LIMIT =  3000;
  @Autowired
    private LdapTemplate ldapTemplate;

  public List<User> getUserByUid(String uid){
    SearchControls searchControls = new SearchControls();
    searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE);
    searchControls.setTimeLimit(TIME_LIMIT);
    searchControls.setReturningAttributes(new String[]{"cn"});

    String filter = "(&(objectclass=person)(uid="+uid+"))";
    return ldapTemplate.search(LdapUtils.emptyLdapName(),filter,searchControls,new UserAttributeMapper());
    //return ldapTemplate.search(LdapUtils.emptyLdapName(),filter,searchControls,new UserAttributeMapper());
}
private class UserAttributeMapper implements AttributesMapper<User> {
    @Override
    public User mapFromAttributes(Attributes attributes) throws NamingException {
        User user = new User();
        user.setuId((String) attributes.get("uid").get());
        user.setFullName((String) attributes.get("cn").get());

        Attribute sn= attributes.get("sn");
        if(sn!=null){
            user.setLastName((String)sn.get());
        }
        return user;
    }
  }
}