Myujth

I want to select(search) any kind of data from my LDAP server.
I have a connection but I don't know how to retrieve any data.
Can anyone give a tip so that I can see anything such as data?

Issue:

When I run the following code, I got:

Exception in thread "main" java.lang.ClassCastException: com.sun.jndi.ldap.LdapCtx cannot be cast to javax.activation.DataSource`

What I tried?

DataSource has two imports:

• 1) javax.sql


• 2) javax.activation

I changed different import but didn't work.

My another question is " Are those two imports the same? "

Source code:

public class LDAPJndi 

 //JNDI API를 사용하여 서버와 연결 (Connecting to LDAP server using JNDI)
 public static DirContext connectJndi() throws NamingException 

 Hashtable<String, String> env = new Hashtable<String, String>(); 
 env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
 env.put(Context.PROVIDER_URL, "ldap://192.168.0.60:389");
 env.put(Context.SECURITY_AUTHENTICATION, "simple");
 env.put(Context.SECURITY_PRINCIPAL, "cn=govmanager");
 env.put(Context.SECURITY_CREDENTIALS, "GOVmoi!manager");
 DirContext ctx = new InitialDirContext(env); 
 return ctx;
 

 public static void lookupJndi() throws NamingException 
 // a method for looking up any data
 DirContext ctx = connectJndi();
 Object o = ctx.lookup("c=kr");
 System.out.println(o);
 //above didn't work, so tried the bottom
 DataSource dataSource = (DataSource) ctx.lookup("c=kr"); //c=kr is BaseDN
 System.out.println(dataSource);
 

I solved the problem like below. I just added many comments to experiment. They might confuse some people, so you may delete them as you wish. And I think the recommended imports by Eclipse work the same in this case. Hope it helped!

public static DirContext connectJndi() throws NamingException 

 Hashtable<String, String> env = new Hashtable<String, String>(); 
 env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
 env.put(Context.PROVIDER_URL, "ldap://192.168.0.60:389");
 env.put(Context.SECURITY_AUTHENTICATION, "simple");
 env.put(Context.SECURITY_PRINCIPAL, "your id");
 env.put(Context.SECURITY_CREDENTIALS, "your password");
 //DirContext ctx = new InitialDirContext(env); 
 LdapContext ctx = new InitialLdapContext(env,null);
 return ctx;
 


public static void lookupJndi() throws NamingException 
 //DirContext ctx = connectJndi();
 LdapContext ctx = (LdapContext) connectJndi();
 SearchControls ctls = new SearchControls();
 ctls.setSearchScope(SearchControls.ONELEVEL_SCOPE);
 //ctls.setReturningAttributes(new String "cn");
 //String searchFilter=String.format("(cn=%s)", "cn" );
 String searchFilter="(objectClass=*)";
 //String searchFilter="(o=*)";

 NamingEnumeration<javax.naming.directory.SearchResult> results
 = ctx.search("c=kr", searchFilter,ctls);
 while(results.hasMoreElements())
 javax.naming.directory.SearchResult sr = results.next();
 Attributes attrs = sr.getAttributes();
 //System.out.println(sr);
 System.out.println(attrs);
 
 // method