取得命名对象的所有属性

import java.util.Hashtable;   
import javax.naming.Context;   
import javax.naming.NamingEnumeration;   
import javax.naming.NamingException;   
import javax.naming.directory.Attribute;   
import javax.naming.directory.Attributes;   
import javax.naming.directory.DirContext;   
import javax.naming.directory.InitialDirContext;   
  
/**  
* Demonstrates how to retrieve all attributes of a named object.  
*   
* usage: java GetAllAttrs  
*/  
class GetAllAttrs {   
  static void printAttrs(Attributes attrs) {   
    if (attrs == null) {   
      System.out.println("No attributes");   
    } else {   
      /* Print each attribute */  
      try {   
        for (NamingEnumeration ae = attrs.getAll(); ae.hasMore();) {   
          Attribute attr = (Attribute) ae.next();   
          System.out.println("attribute: " + attr.getID());   
  
          /* print each value */  
          for (NamingEnumeration e = attr.getAll(); e.hasMore(); System.out   
              .println("value: " + e.next()))   
            ;   
        }   
      } catch (NamingException e) {   
        e.printStackTrace();   
      }   
    }   
  }   
  
  public static void main(String[] args) {   
  
    // Set up the environment for creating the initial context   
    Hashtable<String, Object> env = new Hashtable<String, Object>(11);   
    env   
        .put(Context.INITIAL_CONTEXT_FACTORY,   
            "com.sun.jndi.ldap.LdapCtxFactory");   
    env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=JNDITutorial");   
  
    try {   
      // Create the initial context   
      DirContext ctx = new InitialDirContext(env);   
  
      // Get all the attributes of named object   
      Attributes answer = ctx.getAttributes("cn=Ted Geisel, ou=People");   
  
      // Print the answer   
      printAttrs(answer);   
  
      // Close the context when we're done   
      ctx.close();   
    } catch (Exception e) {   
      e.printStackTrace();   
    }   
  }   
}