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

 1 <beans xmlns="http://www.springframework.org/schema/beans"
 2     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 3     xmlns:aop="http://www.springframework.org/schema/aop"
 4     xmlns:context="http://www.springframework.org/schema/context"
 5     xmlns:tx="http://www.springframework.org/schema/tx"
 6     xsi:schemaLocation="http://www.springframework.org/schema/beans 
 7         http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
 8         http://www.springframework.org/schema/aop 
 9         http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
10         http://www.springframework.org/schema/context
11            http://www.springframework.org/schema/context/spring-context-2.5.xsd
12         http://www.springframework.org/schema/tx 
13         http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
14     <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
15         <property name="configLocation">
16             <value>classpath:hibernate/hibernate.cfg.xml</value>
17         </property>
18     </bean>
19     
20     <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
21         <property name="sessionFactory">
22             <ref bean="sessionFactory"/>
23         </property>
24     </bean>
25     
26     <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
27         <property name="sessionFactory">
28             <ref bean="sessionFactory"/>
29         </property>
30     </bean>
31     
32     <context:component-scan base-package="cn.itcast.s2sh"></context:component-scan>
33     
34     <tx:annotation-driven transaction-manager="transactionManager"/>
35     
36 </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)

 1 package cn.itcast.s2sh.sh.dao.impl;
 2 
 3 import java.io.Serializable;
 4 
 5 import javax.annotation.Resource;
 6 
 7 import org.springframework.orm.hibernate3.HibernateTemplate;
 8 import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
 9 import org.springframework.stereotype.Repository;
10 
11 import cn.itcast.s2sh.domain.sh.Person;
12 import cn.itcast.s2sh.sh.dao.PersonDao;
13 
14 @Repository("personDao")                   　　//生成beanname
15 public class PersonDaoImpl implements PersonDao{
16     @Resource(name="hibernateTemplate")            //从spring.xml中引入
17     private HibernateTemplate hibernateTemplate;   //set  get方法也就不用了，注解的形式注入了
18     @Override
19     public void savePerson(Person person) {
20         // TODO Auto-generated method stub
21         this.hibernateTemplate.save(person);
22     }
23 
24     @Override
25     public Person getPesonById(Serializable id) {
26         // TODO Auto-generated method stub
27         return  (Person) this.hibernateTemplate.load(Person.class, id);
28     }
29     
30 }

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

 1 package cn.itcast.s2sh.sh.service.impl;
 2 
 3 import java.io.Serializable;
 4 
 5 import javax.annotation.Resource;
 6 
 7 import org.springframework.stereotype.Service;
 8 import org.springframework.transaction.annotation.Transactional;
 9 
10 import cn.itcast.s2sh.domain.sh.Person;
11 import cn.itcast.s2sh.sh.dao.PersonDao;
12 import cn.itcast.s2sh.sh.service.PersonService;
13 
14 @Service("personService")
15 public class PersonServiceImpl implements PersonService{
16     @Resource(name="personDao")
17     private PersonDao personDao;
18 
19     @Override
20     @Transactional(readOnly=false)              //事务
21     public void savePerson(Person person) {
22         // TODO Auto-generated method stub
23         this.personDao.savePerson(person);
24     }
25 
26     @Override
27     public Person getPersonByID(Serializable id) {
28         // TODO Auto-generated method stub
29         Person person = this.personDao.getPesonById(id);
30         return person;
31     }
32 }