SpringData【Spring整合Hibernate】

落日映苍穹つ 2022-01-30 05:35 258阅读 0赞

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][https_space.bilibili.com_435498550]

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

![在这里插入图片描述][20190518102225983.png]

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">
    	
    	
    	<context:property-placeholder location="classpath:jdbc.properties"/>
    	
    	
    	<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>
    	
    	
    	<bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
    		<property name="dataSource" ref="dataSource"/>
    		
    		<property name="hibernateProperties">
    			<props>
    				
    				<prop key="hibernate.show_sql">true</prop>
    				
    				<prop key="hibernate.hbm2ddl.auto">update</prop>
    			</props>
    		</property>
    		
    		<property name="packagesToScan">
    			<list>
    				<value>com.dpb.pojo</value>
    			</list>
    		</property>
    	</bean>
    	
    
    	
    	<bean id="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">
    		<property name="sessionFactory" ref="sessionFactory"/>
    	</bean>
    	
    	<bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
    		<property name="sessionFactory" ref="sessionFactory"/>
    	</bean>
    	
    	
    	<tx:annotation-driven transaction-manager="transactionManager"/>
    	
    	
    	<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);
            }
        }
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9kcGItYm9ib2thb3lhLXNtLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70]

操作成功~

[https_space.bilibili.com_435498550]: https://space.bilibili.com/435498550
[https_github.com_q279583842q_springboot-demo-bobokaoya]: https://github.com/q279583842q/springboot-demo-bobokaoya
[20190518102225983.png]: /images/20220130/078ad74e3c8949d09753946c877c82eb.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9kcGItYm9ib2thb3lhLXNtLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70]: /images/20220130/2a330252795a4cab956abee47c6204d9.png