When using spring-ldap - if you get a NoClassDefFoundError for com.sun.jndi.ldap.ctl.ResponseControlFactory then you need the ldap booster pack (currently 1.0).

This is available from Sun:

http://java.sun.com/products/jndi/downloads/index.html

Go to the JNDI 1.2.1 page and grab JNDI/LDAP Booster Pack 1.0 (ldapbp-1_0.zip)

Unzip and then install as an artifact:

mvn install:install-file -DgroupId=com.sun -DartifactId=ldapbp -Dversion=1.0 -Dpackaging=jar -Dfile=/unzippeddir/lib/ldapbp.jar

Then add the dependency to your pom

<dependency>
  <groupId>com.sun</groupId>
  <artifactId>ldapbp</artifactId>
  <version>1.0</version>
</dependency>