How to connect LDAP server using Spring LDAP framework (fully tested code)

import java.util.List;
 
public interface ContactDAO {
 
	public List getAllContactNames();
 
	public List getContactDetails(String commonName);
 
}

import java.util.List;
 
import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import javax.naming.directory.BasicAttribute;
import javax.naming.directory.BasicAttributes;
 
import org.springframework.ldap.AttributesMapper;
import org.springframework.ldap.LdapTemplate;
import org.springframework.ldap.support.DistinguishedName;
import org.springframework.ldap.support.filter.AndFilter;
import org.springframework.ldap.support.filter.EqualsFilter;
 
public class LDAPContactDAO implements ContactDAO{
	private LdapTemplate ldapTemplate;
 
	public void setLdapTemplate(LdapTemplate ldapTemplate) {
		this.ldapTemplate = ldapTemplate;
	}
 
	public List getAllContactNames() {
		return ldapTemplate.search("", "(objectClass=person)",
				new AttributesMapper() {
					public Object mapFromAttributes(Attributes attrs)
							throws NamingException {
						return attrs.get("mail").get();
					}
				});
	}
 
	public List getContactDetails(String objectclass){
		AndFilter andFilter = new AndFilter();
		andFilter.and(new EqualsFilter("objectClass",objectclass));
		System.out.println("LDAP Query " + andFilter.encode());
		return ldapTemplate.search("", andFilter.encode(),new ContactAttributeMapper());
 
	}
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
    <bean id="contextSource"
        class="org.springframework.ldap.support.LdapContextSource">
        <property name="url" value="ldap://your.ldap.url:389" />
        <property name="base" value="base, be careful to put it right" />
        <property name="userName" value="your username" />
        <property name="password" value="password" />
    </bean>
    <bean id="ldapTemplate" class="org.springframework.ldap.LdapTemplate">
        <constructor-arg ref="contextSource" />
    </bean>
    <bean id="ldapContact"
        class="com.javaworld.sample.LDAPContactDAO">
        <property name="ldapTemplate" ref="ldapTemplate" />
    </bean>
</beans>

import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
 
import org.springframework.ldap.AttributesMapper;
 
public class ContactAttributeMapper implements AttributesMapper{
 
	public Object mapFromAttributes(Attributes attributes) throws NamingException {
		ContactDTO contactDTO = new ContactDTO();
 
		Attribute mail = attributes.get("mail");
		Attribute sap = attributes.get("employeeNumber");
		if(mail != null)
			contactDTO.setMail((String)mail.get());
		if(sap != null)
			contactDTO.setSap((String)sap.get());
 
		return contactDTO;
	}
 
}

public class ContactDTO {
 
	String mail;
	String sap;
	public String getSap() {
		return sap;
	}
	public void setSap(String sap) {
		this.sap = sap;
	}
	public String getMail() {
		return mail;
	}
	public void setMail(String mail) {
		this.mail = mail;
	}
 
	public String toString() {
		StringBuffer contactDTOStr = new StringBuffer("Person=[");
 
		contactDTOStr.append(" mail = " + mail);
		contactDTOStr.append(" ]");
		return contactDTOStr.toString();
	}
}

import java.util.List;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
import org.springframework.dao.DataAccessException;
 
public class SpringFrameworkLDAPClient {
 
	public static void main(String[] args) {
		//Resource resource = new ClassPathResource("/SpringLDAPClient/src/com/javaworld/sample/springldap.xml");
		//System.out.println(resource.toString());
		try {
			Resource resource = new ClassPathResource("springldap.xml");
			BeanFactory factory = new XmlBeanFactory(resource);
			System.out.println(factory.toString() + "\n");
 
			ContactDAO ldapContact = (LDAPContactDAO)factory.getBean("ldapContact");	
 
			List contactList = ldapContact.getContactDetails("30662");
			//List contactList =ldapContact.getAllContactNames();
			//System.out.println(contactList.size());
			int count = 0;
			for( int i = 0 ; i < contactList.size(); i++){
				System.out.print("Email: " + ((ContactDTO) contactList.get(i)).getMail() + "  ");
				System.out.println("SAP: " + ((ContactDTO) contactList.get(i)).getSap());
				count++;
			}
			System.out.println("\n" + count);
 
		} catch (DataAccessException e) {
			System.out.println("Error occured " + e.getCause());
		}
	}
}