Spring Framework Orm Di

Code Sample

Dependency Injection (1) package au.com.sgb.example.t1.service; … public class TradeServiceImpl implements TradeService { TradeDAO dao; public TradeServiceImpl(TradeDAO dao) { this.dao = dao; } @Transactional public Trade newTrade(Equity e, String s, Double qty) { Trade t = new Trade(e, s, qty); return save(t); } … public Trade save(Trade data) { return dao.save(data); }

Dependency Injection (2) <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> <beans <bean id=" tradeDAO " class="au.com.sgb.example.t1.dao.hibernate.TradeDAOImpl" > <property name="sessionFactory" ref="sessionFactory"/> </bean> <bean id=" tradeService " class=" au.com.sgb.example.t1.service.TradeServiceImpl "> <constructor-arg ref=" tradeDAO " /> </bean …

DAO Implemenation Using Hibernate (1) package au.com.sgb.example.t1.dao.hibernate; … public class EquityDAOImpl extends HibernateDaoSupport implements EquityDAO { @Override public List<Equity> findByName(String name) { return getHibernateTemplate().find("from Equity e where e.name like ?", "%" + name + "%"); } @Override public List<Equity> findAll() { return getHibernateTemplate().find("from Equity e"); }

DAO Implemenation Using Hibernate (2) @Override public Equity findById(int id) { List equities = getHibernateTemplate().find("from Equity e where e.equity_id = ?", id); if (equities == null || equities.size() == 0) { return null; } else { return (Equity) equities.get(0); } } @Override public Equity save(Equity data) { getHibernateTemplate().saveOrUpdate(data); return data; } }

Web Tier (1) <bean name=" urlMapper " class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping" > <property name="mappings"> <props> <prop key=" /listequity.htm ">listEquityController</prop> <prop key="/doequity.htm">doEquityController</prop> <prop key="/listtrade.htm">listTradeController</prop> <prop key="/dotrade.htm">doTradeController</prop> </props> </property> </bean> … <bean id=" viewResolver " class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass"><value>org.springframework.web.servlet.view.JstlView</value></property> <property name="prefix"><value>/WEB-INF/jsp/</value></property> <property name="suffix"><value>.jsp</value></property> </bean>

Web Tier (2) public class TradeListController extends AbstractController { TradeService tradeService; TradeListController(TradeService service) { this.tradeService = service; } @Override protected ModelAndView handleRequestInternal(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception { List<Trade> ts = tradeService.findAll(); Map<String, Object> vals = new HashMap<String, Object>(); vals.put("trades", ts); return new ModelAndView("listtrade", vals); } }

Spring Framework Orm Di

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