#副標=J2EE系列專欄 (4) #大標=J2EE服務技術 #作者=文/李宗達 ============= 程式1   import java.util.Hashtable;   import javax.naming.Context;   import javax.naming.directory.InitialDirContext;   import javax.naming.directory.DirContext;   import javax.naming.directory.Attributes;   import javax.naming.NamingException;   class JNDI_Demo   {   public static void main(String[] args)   {   try {   Hashtable env = new Hashtable();   env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");   env.put(Context.PROVIDER_URL, "ldap://localhost:389/");   DirContext ctx = new InitialDirContext(env);   Attributes attrs = ctx.getAttributes("cn =Tom,ou=People,o=nexo");      } catch (NamingException e) {     System.err.println("Problem getting attribute:" + e);   }  } } ================