XML data file links java and sap

Hi ,

Please help me this

How to connect xml file to java into sap

please send me sample scenario.

in java i call the this sap function module  'BAPI_MAT_BOM_EXISTENCE_CHECK'.

1. Check BOM existence with BAPI_MAT_BOM_EXISTENCE_CHECK

2. Exit BOM diff if BOM doesn’t exist

3. Read BOM structure with CSAP_MAT_BOM_READ

4. Compare SAP BOM items incl. subitems to XML BOM items and subitems