SpringData【Spring整合Hibernate】-阿里云开发者社区

后面几篇文章会详细的介绍SpringData相关的内容，本文先介绍下Spring整合Hibernate的相关内容，如果对于hibernate还不太熟悉可以参考如下的资料补充学习: https://space.bilibili.com/435498550

相关案例代码:https://github.com/q279583842q/springboot-demo-bobokaoya

Spring整合Hibernate

1.创建maven项目

通过IDEA或者Eclipse创建一个简单的maven工程(jar)即可

2.添加相关的依赖

在pom文件中添加如下依赖

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.3.21.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.6.8.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.3</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>5.0.7.Final</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>4.3.21.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.32</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>4.3.21.RELEASE</version>
    </dependency>
</dependencies>

3.添加对应的配置文件

在resources目录下创建spring的配置文件和数据库连接的属性文件，如下:

jdbc.properties文件中的内容:

jdbc.url=jdbc:mysql://localhost:3306/ssm?characterEncoding=utf-8
jdbc.driver.class=com.mysql.jdbc.Driver
jdbc.username=root
jdbc.password=123456

applicationContext.xml内容:

<?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:context="http://www.springframework.org/schema/context"
  xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
  xsi:schemaLocation="http://www.springframework.org/schema/beans 
  http://www.springframework.org/schema/beans/spring-beans.xsd
  http://www.springframework.org/schema/context
  http://www.springframework.org/schema/context/spring-context.xsd
  http://www.springframework.org/schema/aop
  http://www.springframework.org/schema/aop/spring-aop.xsd
  http://www.springframework.org/schema/tx 
  http://www.springframework.org/schema/tx/spring-tx.xsd">
  <!-- 配置读取properties文件的工具类 -->
  <context:property-placeholder location="classpath:jdbc.properties"/>
  <!-- 配置c3p0数据库连接池 -->
  <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="jdbcUrl" value="${jdbc.url}"/>
    <property name="driverClass" value="${jdbc.driver.class}"/>
    <property name="user" value="${jdbc.username}"/>
    <property name="password" value="${jdbc.password}"/>
  </bean>
  <!-- 配置Hibernate的SeesionFactory -->
  <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <!-- hibernateProperties属性：配置与hibernate相关的内容，如显示sql语句，开启正向工程 -->
    <property name="hibernateProperties">
      <props>
        <!-- 显示当前执行的sql语句 -->
        <prop key="hibernate.show_sql">true</prop>
        <!-- 开启正向工程 -->
        <prop key="hibernate.hbm2ddl.auto">update</prop>
      </props>
    </property>
    <!-- 扫描实体所在的包 -->
    <property name="packagesToScan">
      <list>
        <value>com.dpb.pojo</value>
      </list>
    </property>
  </bean>
  <!-- 配置HiberanteTemplate对象 -->
  <bean id="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">
    <property name="sessionFactory" ref="sessionFactory"/>
  </bean>
  <!-- 配置Hibernate的事务管理器 -->
  <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory"/>
  </bean>
  <!-- 配置开启注解事务处理 -->
  <tx:annotation-driven transaction-manager="transactionManager"/>
  <!-- 配置springIOC的注解扫描 -->
  <context:component-scan base-package="com.dpb"/>
</beans>

4.创建pojo

数据的表结构请自行创建一张简单的users表即可，就三个简单的字段(userid,username,userage),pojo如下:

/**
 * @program: spring-hibernate
 * @description: Users的Pojo对象
 * @author: 波波烤鸭
 * @create: 2019-05-18 09:37
 */
@Entity
@Table(name="users")
public class Users implements Serializable {
    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)//strategy=GenerationType.IDENTITY 自增长
    @Column(name="userid")
    private Integer userid;
    @Column(name="username")
    private String username;
    @Column(name="userage")
    private Integer userage;
    public Integer getUserid() {
        return userid;
    }
    public void setUserid(Integer userid) {
        this.userid = userid;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public Integer getUserage() {
        return userage;
    }
    public void setUserage(Integer userage) {
        this.userage = userage;
    }
    @Override
    public String toString() {
        return "Users [userid=" + userid + ", username=" + username + ", userage=" + userage + "]";
    }
}

5.创建持久层的接口和实现

创建持久层的Dao接口和实现类，具体如下:

/**
 * 定义接口中的方法
 */
public interface UserDao {
    void insertUsers(Users users);
    void updateUsers(Users users);
    void deleteUsers(Users users);
    Users selectUsersById(Integer userid);
    List<Users> selectUserByName(String username);
    List<Users> selectUserByNameUseSQL(String username);
    List<Users> selectUserByNameUseCriteria(String username);
}

实现类----注意导入的jar包

import com.dpb.dao.UserDao;
import com.dpb.pojo.Users;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate5.HibernateTemplate;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
 * @program: spring-hibernate
 * @description: 用户持久层的实现类
 * @author: 波波烤鸭
 * @create: 2019-05-18 09:43
 */
@Repository
public class UserDaoImpl implements UserDao {
    @Autowired
    private HibernateTemplate hibernateTemplate;
    @Override
    public void insertUsers(Users users) {
        this.hibernateTemplate.save(users);
    }
    @Override
    public void updateUsers(Users users) {
        this.hibernateTemplate.update(users);
    }
    @Override
    public void deleteUsers(Users users) {
        this.hibernateTemplate.delete(users);
    }
    @Override
    public Users selectUsersById(Integer userid) {
        return this.hibernateTemplate.get(Users.class, userid);
    }
    /**
     * HQL 使用
     * @param username
     * @return
     */
    @Override
    public List<Users> selectUserByName(String username) {
        //getCurrentSession:当前session必须要有事务边界，且只能处理唯一的一个事务。当事务提交或者回滚后session自动失效
        //openSession:每次都会打开一个新的session.加入每次使用多次。则获得的是不同session对象。使用完毕后我们需要手动的调用colse方法关闭session
        Session session = this.hibernateTemplate.getSessionFactory().getCurrentSession();
        //sql:select * from t_users where username =
        Query query = session.createQuery(" from Users where username = :abc");
        Query queryTemp = query.setString("abc",username);
        return queryTemp.list();
    }
    /**
     * SQL 的使用
     * @param username
     * @return
     */
    @Override
    public List<Users> selectUserByNameUseSQL(String username) {
        Session session = this.hibernateTemplate.getSessionFactory().getCurrentSession();
        Query query = session.createSQLQuery("select * from t_users where username = ?").addEntity(Users.class).setString(0, username);
        return query.list();
    }
    /**
     *  Criteria
     * @param username
     * @return
     */
    @Override
    public List<Users> selectUserByNameUseCriteria(String username) {
        Session session = this.hibernateTemplate.getSessionFactory().getCurrentSession();
        //sql:select * from t_users where username = 张三
        Criteria c = session.createCriteria(Users.class);
        c.add(Restrictions.eq("username", username));
        return c.list();
    }
}

6.单元测试

在test目录下创建单元测试类，测试相关的操作

/**
 * @program: spring-hibernate
 * @description: 单元测试
 * @author: 波波烤鸭
 * @create: 2019-05-18 09:48
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class TestDemo {
    @Autowired
    private UserDao usersDao;
    /**
     * 添加用户
     */
    @Test
    @Transactional// 在测试类对于事务提交方式默认的是回滚。
    @Rollback(false)//取消自动回滚
    public void testInsertUsers(){
        Users users = new Users();
        users.setUserage(20);
        users.setUsername("张三");
        this.usersDao.insertUsers(users);
    }
    /**
     * 更新用户
     */
    @Test
    @Transactional
    @Rollback(false)
    public void testUpdateUsers(){
        Users users = new Users();
        users.setUserid(2);
        users.setUserage(22);
        users.setUsername("李四");
        this.usersDao.updateUsers(users);
    }
    /**
     * 根据userid查询用户
     */
    @Test
    public void testSelectUsersById(){
        Users users = this.usersDao.selectUsersById(2);
        System.out.println(users);
    }
    /**
     * 删除用户
     */
    @Test
    @Transactional
    @Rollback(false)
    public void testDeleteUsers(){
        Users users = new Users();
        users.setUserid(2);
        this.usersDao.deleteUsers(users);
    }
    /**
     * HQL测试
     */
    @Test
    @Transactional
    public void testSelectUserByName(){
        List<Users> list = this.usersDao.selectUserByName("张三");
        for (Users users : list) {
            System.out.println(users);
        }
    }
    /**
     * SQL测试
     */
    @Test
    @Transactional
    public void testSelectUserByNameUseSQL(){
        List<Users> list = this.usersDao.selectUserByNameUseSQL("张三");
        for (Users users : list) {
            System.out.println(users);
        }
    }
    /**
     * Criteria测试
     */
    @Test
    @Transactional
    public void testSelectUserByNameUseCriteria(){
        List<Users> list = this.usersDao.selectUserByNameUseCriteria("张三");
        for (Users users : list) {
            System.out.println(users);
        }
    }
}

操作成功~

SpringData【Spring整合Hibernate】

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