spring ioc注入demo

• 设值注入

<bean id="iBuyServiceImpl" class="com.example.demo.ioc.service.IBuyServiceImpl">
    <property name="ibuyDao" ref="ibuyDaoImpl"></property>
</bean>

public class IBuyServiceImpl implements IBuyService {
    private IBuyDao ibuyDao;
    
    public void setIbuyDao(IBuyDao ibuyDao) {
        this.ibuyDao = ibuyDao;
    }
    
    public void buysomething(String name) {
        // TODO Auto-generated method stub
        ibuyDao.buysomething(name);
    }

}

• 构造器注入

<bean id="iBuyServiceImpl" class="com.example.demo.ioc.service.IBuyServiceImpl">
    <constructor-arg name="ibuyDao" ref = "ibuyDaoImpl"></constructor-arg>
</bean>

public class IBuyServiceImpl implements IBuyService {
    private IBuyDao ibuyDao;
    
    public IBuyServiceImpl(IBuyDao ibuyDao) {
        super();
        this.ibuyDao = ibuyDao;
    }


    public void buysomething(String name) {
        // TODO Auto-generated method stub
        ibuyDao.buysomething(name);
    }

}