Hibernate4 获取sessionFactory出错_问答-阿里云开发者社区

利用

ServiceRegistry serviceRegistry = 
new ServiceRegistryBuilder().applySettings(configuration.getProperties())
.buildServiceRegistry();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);

空指针异常

hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC

        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"

        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <!-- 配置连接数据库的基本信息 -->
        <property name="connection.username">zy</property>
        <property name="connection.password">123456</property>
        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="connection.url">jdbc:oracle:thin:@127.0.0.1:1521:orcl</property>

        <!-- 配置 hibernate 的基本信息 -->
        <!-- hibernate 所使用的数据库方言 -->
        <property name="dialect">org.hibernate.dialect.OracleDialect</property>     

        <!-- 执行操作时是否在控制台打印 SQL -->
        <property name="show_sql">true</property>

        <!-- 是否对 SQL 进行格式化 -->
        <property name="format_sql">true</property>

        <!-- 指定自动生成数据表的策略 -->
        <property name="hbm2ddl.auto">update</property>

        <!-- 指定关联的 .hbm.xml 文件 -->
        <mapping resource="com/zy/hibernate/News.hbm.xml"/>

    </session-factory>

</hibernate-configuration>

News.hbm.xml
 <?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.zy.hibernate">

    <class name="News" table="NEWS2">

        <id name="id" type="java.lang.Integer">
            <column name="ID" />
            <!-- 指定主键的生成方式, native: 使用数据库本地方式 -->
            <generator class="sequence">
            <param name="sequence">news2_seq</param>
            </generator>
        </id>

       <property name="title" type="java.lang.String">
            <column name="TITLE" />
       </property>

       <property name="author" type="java.lang.String">
            <column name="AUTHOR" />
       </property>

       <property name="date" type="java.util.Date">
            <column name="DATE" />
       </property>

    </class>

[java] view plain copy public class HibernateUtil{ private static SessionFactory sessionFactory; static { try{ sessionFactory = new AnnotationConfigration().configure().buildSessionFactory(); } catch (Exception e) { e.printStackTrace(); } } public static SessionFactory getSessionFactory(){ return sessionFactory; } } Hibernate4的替换方案： [java] view plain copy public class HibernateUtil{ private static SessionFactory sessionFactory; static { try{ Configuration cfg = new Configuration().configure(); ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(cfg.getProperties()).buildServiceRegistry(); sessionFactory = cfg.buildSessionFactory(serviceRegistry); }catch (Exception e) { e.printStackTrace(); } } public static SessionFactory getSessionFactory(){ return sessionFactory; }

Hibernate4 获取sessionFactory出错

相关文章

相关电子书