morphia

 import  java.util.regex.Pattern;
 import  com.google.code.morphia.query.Query;
 ...
 Datastore ds；
 Query query = ds.createQuery(Person.class );
 Pattern pattern = Pattern.compile("^.*"  + personName+  ".*$" ,  // as SQL:  like " '%" + personName + "%' "
  Pattern.CASE_INSENSITIVE);
 query.filter("name" , pattern);
 List<Persion> persons = query.asList();