when i change
genXDocletTags="true"
genIntergratedCompositeKeys="true"

and use hbm2java to generate java source file, got some error
[hbm2java] 0 [main] ERROR hbm2java.CodeGenerator - Error parsing XML: file:/D:/java/Tools/Middlegen-Hibernate-r3/build/gen-src/airline/hibernate/Reservation.hbm.xml(47)
[hbm2java] org.xml.sax.SAXParseException: The content of element type "composite-id" must match "(key-property|key-many-to-one)+".

if someone could help me?
thanx.

Two things:
1) The options you have indicated do not both need to be set. If you only want Xdoclet markup then genXDocletTags="true" will do. The other option was a request to generate composite key class as an integrated form. This is not recommended.

2) The problem you have is the hibernate DTD. You will need 2.1b6 DTD (does not matter which Hibernate) for it parse correctly.