LDAP和属性（LDAP）

Question

Hi I am a developer but new to ldap programming. I was able to our Ldap server by providing the DN=ou=app1,ou=development,ou=Group and set my search level to subtree_scope and was able to get to on level down which put me at DN=cn=admin,DN=ou=app1,ou=development,ou=Group . By expanding this DN i see Member(4) , OU(1) , cn(1) ,and Objectclasses: top and groupOfNames . I am trying to access the 4 users with uid=user entries. I got the below message when i tried to access uid :

UID... class javax.naming.directory.SearchResult

null Found cn=Admin:

Attributes are.. No attributes

The following is the snippet of my code. I can provide more if needed

    controls.setReturningAttributes("uid");
    String filter="(objectClass=groupOfNames)"; 

        NamingEnumeration objs = ctx.search("",filter, controls); 


        while (objs.hasMoreElements())
                {

                SearchResult match = (SearchResult)objs.nextElement();

               System.out.println(" UID...\t"+ match.getClass());
               System.out.println(match.getClassName());
               System.out.println("Found "+match.getName()+":");
               System.out.println("Attributes are..\t"+match.getAttributes());


                Attributes attrs = match.getAttributes();
                NamingEnumeration e = attrs.getAll();


                while (e.hasMoreElements())
                {

                    Attribute attr = (Attribute) e.nextElement();
                   System.out.println("Attribute and its class..\t"+attr.getClass());


                }
                System.out.println("---------------------------------------");
            }
                }

Answer 1

The SearchControls define the attributes to be returned by the search. You must have set its 'returningAttributes' property to 'new String[0]'. Leave it at null to get all attributes, or specify the ones you want.