从LDAP目录服务中获取数据的Java例子

package test;
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;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;

public class test {
  private static test instance = new test();
  private DirContext ctx = null;
  public static test getInstance(){
    return instance;
  }
  public test() {
    init();
  }
  public void init(){
    try{
      Hashtable env = new Hashtable();
      String rootdn = "cn=root,dc=universityname,dc=com";
      String rootpw = "secret";
      env.put(Context.SECURITY_AUTHENTICATION, "simple");
      env.put(Context.SECURITY_PRINCIPAL, rootdn);
      env.put(Context.SECURITY_CREDENTIALS, rootpw);
      env.put(Context.INITIAL_CONTEXT_FACTORY,
              "com.sun.jndi.ldap.LdapCtxFactory");
      env.put(Context.PROVIDER_URL,"ldap://localhost:389");
      ctx = new InitialDirContext(env);
    }
    catch(Exception e){
      System.out.println(e.toString());
    }
  }

  public void reload(){
    instance = new test();
  }

  public String getPassword(String userId) {
    byte[] password = null;
    try{
      String userObjectClass = "inetorgPerson";
      String userIdAttrName = "uid";
      String userPwdAttrName = "userPassword";
      String rootEntry = "dc=universityname,dc=com";
      SearchControls controls = new SearchControls();
      controls.setCountLimit(1);
      controls.setSearchScope(SearchControls.SUBTREE_SCOPE);
      String filter = "(&(objectClass=" + userObjectClass + ")(" +
                      "uid" + "=" + userId + "))";
      NamingEnumeration ne = ctx.search(rootEntry, filter, controls);
      if (ne.hasMore()) {
        SearchResult sr = (SearchResult)ne.next();
        Attributes attrs = sr.getAttributes();
        Attribute passwordAttr = attrs.get(userPwdAttrName);
        password =  (byte[])passwordAttr.get();
      }
      else{

      }
      return new String(password);
    }
    catch(Exception e){
      init();
      System.out.println(e.toString());
      return "";
    }

  }

  public static void main(String[] args){
    try{
      System.out.println(test.getInstance().getPassword("test42"));
    }
    catch(Exception e){
      e.printStackTrace();
    }
  }
}

 

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/chen_hh2/archive/2005/11/21/534140.aspx