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;
				/**
				 * Bean implementation class for Enterprise Bean: Item
				 */
				public abstract class ItemBean implements javax.ejb.EntityBean {
					private javax.ejb.EntityContext myEntityCtx;
					/**
					 * setEntityContext
					 */
					public void setEntityContext(javax.ejb.EntityContext ctx) {
						myEntityCtx = ctx;
					}
					/**
					 * getEntityContext
					 */
					public javax.ejb.EntityContext getEntityContext() {
						return myEntityCtx;
					}
					/**
					 * unsetEntityContext
					 */
					public void unsetEntityContext() {
						myEntityCtx = null;
					}
					/**
					 * ejbCreate
					 */
					public salesdb.ItemKey ejbCreate(java.lang.Long itemid)
						throws javax.ejb.CreateException {
						setItemid(itemid);
						return null;
					}
					/**
					 * ejbPostCreate
					 */
					public void ejbPostCreate(java.lang.Long itemid)
						throws javax.ejb.CreateException {
					}
					/**
					 * ejbActivate
					 */
					public void ejbActivate() {
					}
					/**
					 * ejbLoad
					 */
					public void ejbLoad() {
					}
					/**
					 * ejbPassivate
					 */
					public void ejbPassivate() {
					}
					/**
					 * ejbRemove
					 */
					public void ejbRemove() throws javax.ejb.RemoveException {
					}
					/**
					 * ejbStore
					 */
					public void ejbStore() {
					}
					/**
					 * ejbCreate method for a CMP entity bean.
					 */
					public salesdb.ItemKey ejbCreate(
						java.lang.Long itemid,
						java.lang.String name)
						throws javax.ejb.CreateException {
						setItemid(itemid);
						setName(name);
						return null;
					}
					/**
					 * ejbPostCreate
					 */
					public void ejbPostCreate(java.lang.Long itemid, java.lang.String name)
						throws javax.ejb.CreateException {
					}
					/**
					 * Get accessor for persistent attribute: itemid
					 */
					public abstract java.lang.Long getItemid();
					/**
					 * Set accessor for persistent attribute: itemid
					 */
					public abstract void setItemid(java.lang.Long newItemid);
					/**
					 * Get accessor for persistent attribute: name
					 */
					public abstract java.lang.String getName();
					/**
					 * Set accessor for persistent attribute: name
					 */
					public abstract void setName(java.lang.String newName);
				}