Hibernate遇上Spring注释方法擦出的火花

在这篇博客中我直接使用sessionFactory来获得currentSession来操纵数据库，在我上一篇博客中出现的问题，HibernateTemplate在Hibernate4.0中被抛弃了，所以这个方法刚好解决了这个问题。
一、项目的结构图

二、具体实现
1、User类

@Entity@Table(name="t_user")public class User {  @Id  @GeneratedValue(strategy=GenerationType.AUTO)  private Integer id;  @Column(name="username",length=50)  private String username;  @Column(name="password",length=50)  private String password;public Integer getId() {    return id;}public void setId(Integer id) {    this.id = id;}public String getUsername() {    return username;}public void setUsername(String username) {    this.username = username;}public String getPassword() {    return password;}public void setPassword(String password) {    this.password = password;}}

2、UserDao接口

public interface UserDao {  public void save(User user);  public void update(User user);  public void delete(User user);  public User findById(Integer id);  public List<User> findAll();}

3、UserDaoImpl 类
采用事务功能提高代码的安全性，通过spring注释的方式自动加载sessionFactory通过setter方法

@Repositorypublic class UserDaoImpl  implements UserDao{    private SessionFactory sessionFactory;     @Autowired    public void setSessionFactory(SessionFactory sessionFactory){        this.sessionFactory=sessionFactory;    }    public SessionFactory getSessionFactory(){        return this.sessionFactory;    }    public Session getCurrentSession(){        return this.sessionFactory.getCurrentSession();    }    public void save(User user) {        Transaction tx=this.getCurrentSession().beginTransaction();         try{             this.getCurrentSession().save(user);             tx.commit();         }catch(Exception e){             if(null!=tx){tx.rollback();}             e.printStackTrace();         }      }    public void update(User user) {        Transaction tx=this.getCurrentSession().beginTransaction();         try{             this.getCurrentSession().update(user);             tx.commit();         }catch(Exception e){             if(null!=tx){tx.rollback();}             e.printStackTrace();         }      }    public void delete(User user) {        Transaction tx=this.getCurrentSession().beginTransaction();         try{             this.getCurrentSession().delete(user);             tx.commit();         }catch(Exception e){             if(null!=tx){tx.rollback();}             e.printStackTrace();         }      }    public User findById(Integer id) {         Transaction tx=this.getCurrentSession().beginTransaction();         User user=(User)this.getCurrentSession().get(User.class, id);         tx.commit();         return user;    }    public List<User> findAll() {         Transaction tx=this.getCurrentSession().beginTransaction();         List<User> users=(List<User>) this.getCurrentSession().get(User.class,null);         tx.commit();         return users;    }}

4、applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?><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:tx="http://www.springframework.org/schema/tx"          xmlns:context="http://www.springframework.org/schema/context"         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-3.1.xsd            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">        <!-- 扫描 -->        <context:component-scan base-package="cn.wjw"></context:component-scan>        <!-- 0.1加载properties -->        <context:property-placeholder location="classpath:c3p0-db.properties"/>        <!-- 0.2配置数据源 -->        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">          <property name="driverClass" value="${jdbc.driverClass}"></property>          <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>          <property name="user" value="${jdbc.user}"></property>          <property name="password" value="${jdbc.password}"></property>        </bean>  <!-- 1.配置 SessionFactory -->  <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">  <!--  1.1配置数据源 -->  <property name="dataSource" ref="dataSource"/>  <!-- 1.2 其他配置项，要使用Hibernate全属性名，如果Hibernate.不要省略 -->  <property name="hibernateProperties">  <props>  <!-- 数据库方言定义 -->  <prop key="hibernate.dialect">    org.hibernate.dialect.MySQL5Dialect  </prop>  <!-- 向控制台显示执行的SQL语句 -->  <prop key="hibernate.show_sql">true</prop>  <!-- 创建SessionFactory对象时自动创建数据库表 -->  <prop key="hibernate.hbm2ddl.auto">update</prop>  <!-- 取消bean校验 -->  <prop key="javax.persistence.validation.mode">none</prop>  <prop key="hibernate.current_session_context_class">thread</prop>  <prop key=""></prop>  </props>  </property>        <property name="packagesToScan">            <list>                <value>cn.wjw.domain</value>            </list>        </property>  </bean>  <!-- 4.事务管理 -->  <!-- #1 事务管理器，就是平台，Spring工具产生，依赖于使用 持久方案  (hibernate、jdbc等) -->  <bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">   <property name="sessionFactory" ref="sessionFactory"/>  </bean>  <!-- 将事务管理注册Spring  * proxy-target-class="true" :使用cglib  * proxy-target-class="false":有接口将使用JDK-->  <tx:annotation-driven transaction-manager="txManager"/></beans>

5、c3p0-db.properties

jdbc.driverClass=com.mysql.jdbc.Driverjdbc.jdbcUrl=jdbc\:mysql\://localhost\:3306/database?useUnicode\=true&characterEncoding\=utf-8jdbc.user=你的数据库用户名jdbc.password=你的数据库密码

6、Spring注释的优点
使得代码简洁，但却可读性降低，但是在平时的开发中熟练这种方法有助于提高开发效率。