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;
    }
}