spring+spring MVC+hibernate整合

spring+spring MVC+hibernate

先导入hibernate依赖包

<!-- hibernate配置-->
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>${hibernateVersion}</version>
</dependency>

我们使用c3p0的连接池管理数据库连接配合hibernate使用

<!-- 数据库连接池-->
<dependency>
    <groupId>c3p0</groupId>
    <artifactId>c3p0</artifactId>
    <version>${c3p0Version}</version>
</dependency>
注意:依赖包版本信息请自己在<properties></properties>中注明

接着我们准备hibernate的配置文件(properties),包括了数据库配置

#database connection config
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/hibernate_test?useUnicode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=1

#hibernate config
#dialect:配置方言,根据不同方言生成不同sql语句
hibernate.dialect=org.hibernate.dialect.MySQLDialect
hibernate.show_sql=true
hibernate.format_sql=true
hibernate.hbm2ddl.auto=update

接下来我们去spring的配置文件中配置数据源、session工厂和事务

    <!--扫描配置文件此处***表示你的hibernate配置文件的名字-->
    <context:property-placeholder location="classpath:/***.properties" />

    <!--配置数据源-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
        <property name="driverClass" value="${jdbc.driver}" />
        <property name="jdbcUrl" value="${jdbc.url}" />
        <property name="user" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
        <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.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  -->
    <!--  5.事务管理器-->
    <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

    <!--6.事务-->
    <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>

最后在web.xml文件中引入spring的配置文件

<!--加载Spring的配置文件到上下文中去-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath:spring-context.xml
        </param-value>
    </context-param>

<!-- Spring监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

到这里整合已经完成了

我们来建一张表

@Entity
//name的值是数据库表名
@Table(name = "Person")
public class Person {

    //主键
    @Id
    //自动生成值
    @GeneratedValue
    private Integer id;

    //列名
    @Column(name = "name")
    private String name;

    //列名
    @Column(name = "age")
    private Integer age;

    public Person() {
    }

    public Person(Integer id, String name, Integer age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

}

下面写一个Dao的实现类,Dao就略过了

@Repository
public class PersonDaoImpl implements PersonDao {

    @Autowired
    private SessionFactory sessionFactory;

    private Session getCurrentSession() {

        return sessionFactory.openSession();
    }

    public Person load(Integer id) {
        return (Person) getCurrentSession().load(Person.class, id);
    }

    public Person get(Integer primaryKey) {
        return (Person) getCurrentSession().get(Person.class, primaryKey);
    }

    public Integer save(Person entity) {
        return (Integer) getCurrentSession().save(entity);
    }

    public void delete(Integer id) {
        //查询需要删除的对象
        Person person = get(id);

        Session session = null;
        //事务对象
        Transaction ts = null;
        try {
            session = getCurrentSession();
            //开启事务
            ts = session.beginTransaction();
            session.delete(person);
            ts.commit();
        } catch (Exception e) {
            //回滚
            if (ts != null) ts.rollback();
        } finally {
            //释放资源
            if (session != null) session.close();
        }
    }

    public void deleteAll() {

    }

    public void flush() {
        getCurrentSession().flush();
    }

    public void persist(Person entity) {
        getCurrentSession().persist(entity);
    }

    public void saveOrUpdate(Person entity) {
        Session session = null;
        Transaction ts = null;
        try {
            session = getCurrentSession();
            ts = session.beginTransaction();
            session.saveOrUpdate(entity);
            ts.commit();
        } catch (Exception e) {
            if (ts != null) ts.rollback();
        } finally {
            if (session != null) session.close();
        }

    }

    public List<Person> getAll() {
        Query query = getCurrentSession().createQuery("from Person");
        List<Person> list = query.list();
        return list;
    }


}

通过依赖注入获取到session的对象,使用session对象里面的基础方法来CRUD,基础方法是hibernate已经写好的,参照着他的规范写就行

注意:delete和update操作必须用事务,不然delete和update操作会失效,没有反应

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转载自blog.csdn.net/qq1010830256/article/details/84974608
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