SpringData【Spring整合Hibernate】

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.spring work</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.spring work</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.spring work</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. 内容:

<? version="1.0" encoding="UTF-8"?>

 ns:xsi="http://www.w3.org/2001/ Schema-instance"  ns:context="http://www.spring work.org/schema/context" ns:aop="http://www.spring work.org/schema/aop"  ns:tx="http://www.spring work.org/schema/tx"xsi:schemaLocation="http://www.spring work.org/schema/beans http://www.spring work.org/schema/beans/spring-beans.xsdhttp://www.spring work.org/schema/contexthttp://www.spring work.org/schema/context/spring-context.xsdhttp://www.spring work.org/schema/aophttp://www.spring work.org/schema/aop/spring-aop.xsdhttp://www.spring work.org/schema/tx http://www.spring work.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.spring work.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.spring work.orm.hibernate5.HibernateTemplate">    <property name="sessionFactory" ref="sessionFactory"/></bean><!-- 配置Hibernate的事务管理器 --><bean id="transactionManager" class="org.spring work.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  -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
• @de ion: 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;}@Overridepublic 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.spring work.beans.factory.annotation.Autowired;
import org.spring work.orm.hibernate5.HibernateTemplate;
import org.spring work.stereotype.Repository;

import java.util.List;

/**

• @program: spring-hibernate
• @de ion: 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 {

@Autowiredprivate HibernateTemplate hibernateTemplate;@Overridepublic void insertUsers(Users users) {    this.hibernateTemplate.save(users);}@Overridepublic void updateUsers(Users users) {    this.hibernateTemplate.update(users);}@Overridepublic void deleteUsers(Users users) {    this.hibernateTemplate.delete(users);}@Overridepublic Users selectUsersById(Integer userid) {    return this.hibernateTemplate.get(Users.class, userid);}/** * HQL 使用 * @param username * @return */@Overridepublic 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 */@Overridepublic 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 */@Overridepublic 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
• @de ion: 单元测试
• @author: 波波烤鸭
• @create: 2019-05-18 09:48
  */

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext. ")
public class TestDemo {

@Autowiredprivate 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 */@Testpublic 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@Transactionalpublic void testSelectUserByName(){    List<Users> list = this.usersDao.selectUserByName("张三");    for (Users users : list) {        System.out.println(users);    }}/** * SQL测试 */@Test@Transactionalpublic void testSelectUserByNameUseSQL(){    List<Users> list = this.usersDao.selectUserByNameUseSQL("张三");    for (Users users : list) {        System.out.println(users);    }}/** * Criteria测试 */@Test@Transactionalpublic 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
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