Question

以下摘自XML应用程序上下文定义显示了我如何在其上调优JDBC DataSource和Hibernate SessionFactory：

 <context:component-scan base-package="com.phoneBook.dao" />
    <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="org.postgresql.Driver" />
        <property name="url" value="jdbc:postgresql://localhost:5432/postgres?currentSchema=phoneBook" />
        <property name="username" value="postgres" />
        <property name="password" value="a1f10g" />
        <property name="initialSize" value="20" />
        <property name="maxActive" value="100"/>
    </bean>
    <bean id="mySessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
        <property name="dataSource" ref="myDataSource"/>
        <property name="hibernateProperties">
            <value>
                hibernate.dialect=org.hibernate.dialect.PostgreSQL94Dialect
            </value>
        </property>
        <property name="annotatedClasses">
            <list>
                <value>com.phoneBook.model.Address</value>
                <value>com.phoneBook.model.Contact</value>
                <value>com.phoneBook.model.User</value>
                <value>com.phoneBook.model.Lang</value>
            </list>
        </property>
    </bean>
    <bean  id="myProductDao" class="com.phoneBook.dao.Impl.AddressDaoImpl">
        <property name="sessionFactoryBean" ref="mySessionFactory"/>
    </bean>

并基于此上下文创建了我的dao类，其中一部分显示在下面

package com.phoneBook.dao.Impl;

 @Repository
    public class AddressDaoImpl implements AddressDao{ 
        private Session currentSession;
        private Transaction currentTransaction;
        private LocalSessionFactoryBean sessionFactoryBean;
        private SessionFactory sessionFactory;    
        public SessionFactory getSessionFactory() {
            return (SessionFactory) sessionFactoryBean.getObject();
        }

        public void setSessionFactory(SessionFactory sessionFactory) {
            this.sessionFactory = sessionFactory;
        }    
        public LocalSessionFactoryBean getSessionFactoryBean() {
            return sessionFactoryBean;
        }    
        public void setSessionFactoryBean(LocalSessionFactoryBean sessionFactoryBean) {
            this.sessionFactoryBean = sessionFactoryBean;
        }

但是当我运行我的测试时我有NPE，有人可以解释我做错了吗

@Test
public void addressTest(){
     AddressDaoImpl addressDao = new AddressDaoImpl();

     try {
         addressDao.openSessionWithTransaction();
         System.out.print(addressDao.findById(1).toString());
         addressDao.openSessionWithTransaction();
     } catch (DataBaseException e) {
         addressDao.closeSessionWithTransaction();
         e.printStackTrace();
     }

Answer 1

您必须在测试用例中自动装配AddressDaoImpl：

@Test
public void addressTest(){

     @Autowired
     AddressDaoImpl addressDao

或者更好地使用界面：

@Test
public void addressTest(){

     @Autowired
     AddressDao addressDao

不要忘记用以下方式运行测试：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath*:<your configuration>")

因为Autowiering仅适用于Container托管bean，而不是您使用new关键字创建Bean。

Session容器中的SessionFactory设置

1 个答案: