spring注解 annotation

@Resourse(name="  xxx") 意味从上下文找xxx名字一样的然后引入

@Repository("personDao") 意味生成一个 bean 以便于让其他高业务层的去找这个　　的bean

spring.xml新加入

xmlns:context="http://www.springframework.org/schema/context"

http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd

spring.xml中

 <beans xmlns="http://www.springframework.org/schema/beans"

     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

     xmlns:aop="http://www.springframework.org/schema/aop"

     xmlns:context="http://www.springframework.org/schema/context"

     xmlns:tx="http://www.springframework.org/schema/tx"

     xsi:schemaLocation="http://www.springframework.org/schema/beans

         http://www.springframework.org/schema/beans/spring-beans-2.5.xsd

         http://www.springframework.org/schema/aop

         http://www.springframework.org/schema/aop/spring-aop-2.5.xsd

         http://www.springframework.org/schema/context

            http://www.springframework.org/schema/context/spring-context-2.5.xsd

         http://www.springframework.org/schema/tx

         http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

     <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

         <property name="configLocation">

             <value>classpath:hibernate/hibernate.cfg.xml</value>

         </property>

     </bean>

     <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">

         <property name="sessionFactory">

             <ref bean="sessionFactory"/>

         </property>

     </bean>

     <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">

         <property name="sessionFactory">

             <ref bean="sessionFactory"/>

         </property>

     </bean>

     <context:component-scan base-package="cn.itcast.s2sh"></context:component-scan>

     <tx:annotation-driven transaction-manager="transactionManager"/>

 </beans>

impl注解  (因为声明了注解，所以不能继承HibernateDaoSupport，利用组合的方式)

 package cn.itcast.s2sh.sh.dao.impl;

 import java.io.Serializable;

 import javax.annotation.Resource;

 import org.springframework.orm.hibernate3.HibernateTemplate;

 import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

 import org.springframework.stereotype.Repository;

 import cn.itcast.s2sh.domain.sh.Person;

 import cn.itcast.s2sh.sh.dao.PersonDao;

 @Repository("personDao")                   　　//生成beanname

 public class PersonDaoImpl implements PersonDao{

     @Resource(name="hibernateTemplate")            //从spring.xml中引入

     private HibernateTemplate hibernateTemplate;   //set  get方法也就不用了，注解的形式注入了

     @Override

     public void savePerson(Person person) {

         // TODO Auto-generated method stub

         this.hibernateTemplate.save(person);

     }

     @Override

     public Person getPesonById(Serializable id) {

         // TODO Auto-generated method stub

         return  (Person) this.hibernateTemplate.load(Person.class, id);

     }

 }

public class PersonDaoImpl extends HibernateSupport implements PersonDao
{//上面代码一样 没有成员变量hibernateTemplate

}
因为HibernateTemple 是spring提供的类，它里面有 private HibernateTemplate hibernateTemplate;的成员变量，这个成员变量也需要 HibernateSupport提供注解，但是源代码里上面没有注解，但是又需要注入这个hibernateTemplate变量，因为继承关系继承父类的，所以 改写成组合方式，不用继承。

serviceImpl

 package cn.itcast.s2sh.sh.service.impl;

 import java.io.Serializable;

 import javax.annotation.Resource;

 import org.springframework.stereotype.Service;

 import org.springframework.transaction.annotation.Transactional;

 import cn.itcast.s2sh.domain.sh.Person;

 import cn.itcast.s2sh.sh.dao.PersonDao;

 import cn.itcast.s2sh.sh.service.PersonService;

 @Service("personService")

 public class PersonServiceImpl implements PersonService{

     @Resource(name="personDao")

     private PersonDao personDao;

     @Override

     @Transactional(readOnly=false)              //事务

     public void savePerson(Person person) {

         // TODO Auto-generated method stub

         this.personDao.savePerson(person);

     }

     @Override

     public Person getPersonByID(Serializable id) {

         // TODO Auto-generated method stub

         Person person = this.personDao.getPesonById(id);

         return person;

     }

 }