一个简单的EJB实例.用DB2连接.JSP页面.很好用.供大家学习

				package salesdb.websphere_deploy.DB2UDBNT_V8_1;								/**				 * ItemBeanExtractor_ff154d23				 */				public class ItemBeanExtractor_ff154d23 extends com.ibm.ws.ejbpersistence.dataaccess.AbstractEJBExtractor {					/**					 * ItemBeanExtractor_ff154d23					 */					public ItemBeanExtractor_ff154d23() {						int[] pkCols={1};						setPrimaryKeyColumns(pkCols);										int[] dataCols={1,2};						setDataColumns(dataCols);					}					/**					 * extractData					 */					public com.ibm.ws.ejbpersistence.cache.DataCacheEntry extractData(com.ibm.ws.ejbpersistence.dataaccess.RawBeanData dataRow) throws com.ibm.ws.ejbpersistence.utilpm.ErrorProcessingResultCollectionRow, com.ibm.ws.ejbpersistence.utilpm.PersistenceManagerInternalError {						int[] dataColumns = getDataColumns();										salesdb.websphere_deploy.DB2UDBNT_V8_1.ItemBeanCacheEntryImpl_ff154d23 entry=							new salesdb.websphere_deploy.DB2UDBNT_V8_1.ItemBeanCacheEntryImpl_ff154d23();										entry.setDataForITEMID(dataRow.getLong(dataColumns[0]), dataRow.wasNull());						entry.setDataForNAME(dataRow.getString(dataColumns[1]));										return entry;					}					/**					 * extractPrimaryKey					 */					public Object extractPrimaryKey(com.ibm.ws.ejbpersistence.dataaccess.RawBeanData dataRow) throws com.ibm.ws.ejbpersistence.utilpm.ErrorProcessingResultCollectionRow, com.ibm.ws.ejbpersistence.utilpm.PersistenceManagerInternalError {						int[] primaryKeyColumns = getPrimaryKeyColumns();										salesdb.ItemKey key=							new salesdb.ItemKey();										key.itemid=new Long(dataRow.getLong(primaryKeyColumns[0]));										return key;					}					/**					 * getHomeName					 */					public String getHomeName() {						return "Item";					}					/**					 * getChunkLength					 */					public int getChunkLength() {						return 2;					}				}