Spring事务--非注解--持久层|业务层

Dao模板类:

package org.niit.springtrans.dao;import java.sql.SQLException;import org.hibernate.Criteria;import org.hibernate.HibernateException;import org.hibernate.Session;import org.hibernate.criterion.MatchMode;import org.hibernate.criterion.Order;import org.hibernate.criterion.Projections;import org.hibernate.criterion.Restrictions;import org.niit.springtrans.entities.pagination.*;import org.springframework.orm.hibernate3.HibernateCallback;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import org.springframework.stereotype.Repository;public class BaseDao extends HibernateDaoSupport{public void update(Object entity){getHibernateTemplate().update(entity);}/** * 预处理条件 * */private void prepareCondition(Criteria qbc,PageInfo pi){if (pi.getPconditionList()!=null && pi.getPconditionList().size()>0){for (PCondition pcd : pi.getPconditionList()) {switch (pcd.getOpt()) {case PEQ:qbc.add(Restrictions.eq(pcd.getPropertyName(),pcd.getPropertyValue()));break;case PGT:qbc.add(Restrictions.gt(pcd.getPropertyName(),pcd.getPropertyValue()));break;case PNE:qbc.add(Restrictions.ne(pcd.getPropertyName(),pcd.getPropertyValue()));break;case PLT:qbc.add(Restrictions.lt(pcd.getPropertyName(),pcd.getPropertyValue()));break;case PLE:qbc.add(Restrictions.le(pcd.getPropertyName(),pcd.getPropertyValue()));break;case PLIKE:qbc.add(Restrictions.like(pcd.getPropertyName(),pcd.getPropertyValue()==null?"":pcd.getPropertyValue().toString(),MatchMode.ANYWHERE));break;default:break;}}}}/** * 预处理排序 * */private void PrepareOrderField(Criteria qbc,PageInfo pi){if (qbc==null || pi==null || pi.getPorderLlist()==null || pi.getPorderLlist().size()==0){return;}for (POrder orderfield : pi.getPorderLlist()) {switch (orderfield.getPdirect()) {case ASC:qbc.addOrder(Order.asc(orderfield.getPropertyName()));break;case DESC:qbc.addOrder(Order.desc(orderfield.getPropertyName()));break;default:break;}}}public void pager(final PageInfo pi){getHibernateTemplate().execute(new HibernateCallback() {@Overridepublic Object doInHibernate(Session session) throws HibernateException,SQLException {try {Criteria qbc = session.createCriteria(pi.getClazz());qbc.setProjection(Projections.rowCount());//设置投影【查询总条数】prepareCondition(qbc, pi);//处理条件pi.setRecordCount(Integer.parseInt(qbc.uniqueResult().toString()));//得到总条数pi.setPageCount(pi.getRecordCount()%pi.getPageSize()==0?pi.getRecordCount()/pi.getPageSize():pi.getRecordCount()/pi.getPageSize()+1);//计算总页数qbc.setProjection(null);//清空投影设置//开始分页PrepareOrderField(qbc, pi);//处理排序qbc.setFirstResult((pi.getPageIndex()-1)*pi.getPageSize());//设置第一条索引qbc.setMaxResults(pi.getPageSize());//设置要显示的条数pi.setResult(qbc.list());} catch (Exception e) {e.printStackTrace();} finally {session.close();}return null;}});}}

 

 

package org.niit.springtrans.dao;import javax.annotation.Resource;import javax.persistence.Inheritance;import org.niit.springtrans.entities.Account;import org.springframework.stereotype.Repository;public class AccountDao extends BaseDao {public Account getAccount(long aid){return (Account)getHibernateTemplate().get(Account.class,aid);}}

 

 

package org.niit.springtrans.dao;import java.sql.SQLException;import org.hibernate.HibernateException;import org.hibernate.Session;import org.niit.springtrans.entities.Card;import org.niit.springtrans.entities.Tradecredential;import org.springframework.orm.hibernate3.HibernateCallback;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import org.springframework.stereotype.Repository;public class CardDao extends BaseDao {public Card getCard(String cid){return (Card)getHibernateTemplate().get(Card.class,cid);}}

 

package org.niit.springtrans.dao;import java.sql.SQLException;import org.hibernate.HibernateException;import org.hibernate.Session;import org.niit.springtrans.entities.Tradecredential;import org.springframework.orm.hibernate3.HibernateCallback;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import org.springframework.stereotype.Repository;public class TradecredentialDao extends BaseDao{/** * 保存交易凭据 * */public void add(final Tradecredential tc){getHibernateTemplate().execute(new HibernateCallback() {@Overridepublic Object doInHibernate(Session session) throws HibernateException,SQLException {session.save(tc);return null;}});}}

 

业务层接口:

package org.niit.springtrans.biz;import org.niit.springtrans.entities.Account;public interface IAccountBiz {public Account getAccount(long aid);}

 

package org.niit.springtrans.biz;import org.niit.springtrans.entities.Card;public interface ICardBiz {public Card getCard(String cid);}

 

package org.niit.springtrans.biz;import org.niit.springtrans.entities.Tradecredential;import org.niit.springtrans.entities.pagination.PageInfo;/**交易接口*/public interface ITradeBiz {/**交易方法*/public void trade(Tradecredential tc);public void getTradecredentiales(PageInfo pi);}

 

业务层实现类:

package org.niit.springtrans.biz.impl;import org.niit.springtrans.biz.IAccountBiz;import org.niit.springtrans.dao.AccountDao;import org.niit.springtrans.entities.Account;/**账户业务对象*/public class AccountBiz implements IAccountBiz {private AccountDao accountDao;public void setAccountDao(AccountDao accountDao) {this.accountDao = accountDao;}@Overridepublic Account getAccount(long aid) {// TODO Auto-generated method stubreturn accountDao.getAccount(aid);}}

 

package org.niit.springtrans.biz.impl;import org.niit.springtrans.biz.ICardBiz;import org.niit.springtrans.dao.CardDao;import org.niit.springtrans.entities.Card;public class CardBiz implements ICardBiz {private CardDao cardDao;public void setCardDao(CardDao cardDao) {this.cardDao = cardDao;}@Overridepublic Card getCard(String cid) {// TODO Auto-generated method stubreturn cardDao.getCard(cid);}}

 

package org.niit.springtrans.biz.impl;import org.niit.springtrans.biz.ITradeBiz;import org.niit.springtrans.dao.CardDao;import org.niit.springtrans.dao.TradecredentialDao;import org.niit.springtrans.entities.Card;import org.niit.springtrans.entities.Tradecredential;import org.niit.springtrans.entities.pagination.PageInfo;import org.niit.springtrans.exception.TradeException;public class TradeBiz implements ITradeBiz {private TradecredentialDao tcDao;private CardDao cardDao;public void setCardDao(CardDao cardDao) {this.cardDao = cardDao;}public void setTcDao(TradecredentialDao tcDao) {this.tcDao = tcDao;}@Overridepublic void getTradecredentiales(PageInfo pi) {// TODO Auto-generated method stubtcDao.pager(pi);}/**交易方法*/@Overridepublic void trade(Tradecredential tc) {//begin transaction//1.A账户上减去交易金额Card ca = cardDao.getCard(tc.getCardByTacid().getCid());//得到一个持久化的Card对象ca.setBalance(ca.getBalance()-tc.getTmoney());cardDao.update(ca);//2.判断A账户余额[余额不得少于10元]if (ca.getBalance()<10){throw new TradeException("余额不得低于10元");}//3.B账户上加上交易金额Card cb = cardDao.getCard(tc.getCardByTbcid().getCid());//得到一个持久化的Card对象cb.setBalance(cb.getBalance()+tc.getTmoney());cardDao.update(cb);//4.添加交易记录tcDao.add(tc);//commit transaction or rollback transaction}}