Hibernate初体验

@Entity  //实体映射
@Table(name = "user")  //数据库表白
public class User {
 
 @Id //主键id
 @GeneratedValue //主键生成方式
 private int id;
 
 @Column(name = "name") //字段名
 private String name;
 
 @Column(name = "pwd")
 private String pwd;
 
 @Column(name = "adder")
 private String adder;
 
 @Column(name = "age")
 private int age;
 
 @Column(name = "salary")
 private double salary;

import com.yanghj.ssh.entity.User;

/**
* @ClassName: UserRepository  
* @Description: UserDao  
* @author yang hai ji  
* @date 2018年6月7日
*/
public interface UserRepository {

 //查询所有用户
 User findUser ();
}

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import com.yanghj.ssh.entity.User;
import com.yanghj.ssh.repository.UserRepository;

/**
* 
* @ClassName: UserRepositoryImpl
* @Description: 用户dao层实现
* @author yang hai ji
* @date 2018年6月7日
*/
@Repository
public class UserRepositoryImpl implements UserRepository {

 @Autowired
 private SessionFactory sessionFactory;

 private Session getCurrentSession() {
   return this.sessionFactory.openSession();
 }

 @Override
 public User findUser() {
   return (User) getCurrentSession().get(User.class, 1);
 }
 }

/**
* @ClassName: UserServiceImpl  
* @Description:  用户Service实现
* @author yang hai ji  
* @date 2018年6月7日
*/
@Service
public class UserServiceImpl implements UserService {

 @Autowired
 private UserRepository userRepository;
 
 @Override
 public User findUser() {
   return userRepository.findUser();
 }
}

/**
 * @Title: findUser  
 * @Description: 根据id查询用户 
 * @param @return    参数  
 * @return User    返回类型  
 * @throws
 */
 @RequestMapping("/findUser")
 @ResponseBody
 public User findUser(){
    return userService.findUser();
 } 

<beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:context="http://www.springframework.org/schema/context"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-4.1.xsd">

  <!-- Spring对com.xrom.ssh目录下的@Repository、@Service、@@Component注解标注的bean进行自动扫描 -->
  <context:component-scan base-package="com.yanghj.ssh">
      <!-- 扫描时跳过 @Controller 注解的JAVA类（控制器） -->
      <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
  </context:component-scan>

  <!--                             hibernate配置                          -->
  <context:property-placeholder location="classpath:/jdbc.properties"/>

  <!--配置数据源-->
  <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
      <property name="driverClass" value="${jdbc.driver}"/>  <!--数据库连接驱动-->
      <property name="jdbcUrl" value="${jdbc.url}"/>     <!--数据库地址-->
      <property name="user" value="${jdbc.username}"/>   <!--用户名-->
      <property name="password" value="${jdbc.password}"/>   <!--密码-->
      <property name="maxPoolSize" value="40"/>      <!--最大连接数-->
      <property name="minPoolSize" value="1"/>       <!--最小连接数-->
      <property name="initialPoolSize" value="10"/>      <!--初始化连接池内的数据库连接-->
      <property name="maxIdleTime" value="20"/>  <!--最大空闲时间-->
  </bean>

  <!--配置session工厂-->
  <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
      <property name="dataSource" ref="dataSource"/>
      <property name="packagesToScan" value="com.yanghj.ssh.entity"/>
      <property name="hibernateProperties">
          <props>
              <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop> <!--hibernate根据实体自动生成数据库表-->
              <prop key="hibernate.dialect">${hibernate.dialect}</prop>   <!--指定数据库方言-->
              <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>     <!--在控制台显示执行的数据库操作语句-->
              <prop key="hibernate.format_sql">${hibernate.format_sql}</prop>     <!--在控制台显示执行的数据哭操作语句（格式）-->
          </props>
      </property>
  </bean>

  <!-- 事物管理器配置  -->
  <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
      <property name="sessionFactory" ref="sessionFactory"/>
  </bean>

</beans>

<beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:mvc="http://www.springframework.org/schema/mvc"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-4.1.xsd
      http://www.springframework.org/schema/mvc
      http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">

  <!-- 启动注解驱动的spring MVC功能,注册请求url和注解POJO类方法的映射-->
  <mvc:annotation-driven/>

  <!--对@controller注解标注的bean进行自动扫描-->
  <context:component-scan base-package="com.yanghj.ssh.controller"/>

  <!-- 对模型视图名称的解析,在请求时模型视图名称添加前后缀 -->
  <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
      <property name="prefix" value="views/"/>      <!-- 前缀 -->
      <property name="suffix" value=".jsp"/>   <!-- 后缀 -->
  </bean>

  <!--这里是对静态资源的映射-->
  <mvc:resources mapping="/js/**" location="/resources/js/"/>
  <mvc:resources mapping="/css/**" location="/resources/css/"/>
  <mvc:resources mapping="/img/**" location="/resources/img/"/>

</beans>