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

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

<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>

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"?>

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"/>

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);
    }
}

}

作者：波波烤鸭
来源：CSDN
原文：https://blog.csdn.net/qq_38526573/article/details/90312221
版权声明：本文为博主原创文章，转载请附上博文链接！

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