2
Hibernate 구성을 올바르게 설정하는 데 문제가 있습니다. HibernateDaoSupport를 GenericDao로 확장하고 그것들을 클래스 특정 daos로 확장하려고 시도했지만, getao()가 NPE에서 findByNamedQuery를 호출하면 getSession()이 NPE를 throw합니다. 내가 HibernateTemplate에 연장으로 전환하려 할 때Spring 하이버 네이트 설정 결과 세션 NPE
은 HibernateTemplate에 제대로 인스턴스화, 아직도 널되지 않습니다 : 나는 무엇을 놓치고
java.lang.NullPointerException
at org.springframework.orm.hibernate3.support.HibernateDaoSupport.getSession(HibernateDaoSupport.java:143)
at com.jmt.hibernate.dao.GenericDaoImpl.findByNamedQuery(GenericDaoImpl.java)
?
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="MyEntityManager" transaction-type="RESOURCE_LOCAL"> <!-- "JTA"> -->
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:/DefaultDS</jta-data-source>
<class>com.jmt.model.UserEntity</class>
<shared-cache-mode>ENABLE_SELECTIVE</shared-cache-mode>
<validation-mode>CALLBACK</validation-mode>
<properties>
<property name="hibernate.archive.autodetection" value="class"/>
<property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/><!-- org.hibernate.dialect.HSQLDialect" -->
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
<property name="hibernate.connection.url" value="${jdbc.url}"/>
<property name="hibernate.connection.username" value="${jdbc.username}"/>
<property name="hibernate.connection.password" value="${jdbc.password}"/>
</properties>
</persistence-unit>
</persistence>
:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>hibernate3-maven-plugin</artifactId>
<version>3.0</version>
<configuration>
<components>
<component>
<name>hb2ddl</name>
<implementation>jpaconfiguration</implementation>
</component>
</components>
<componentProperties>
<drop>true</drop>
<outputfilename>output.sql</outputfilename>
<format>false</format>
<persistenceunit>MyEntityManager</persistenceunit>
<ejb3>true</ejb3>
</componentProperties>
</configuration>
</plugin>
2.
가 persistence.xml을 내 엔티티 관리자를 정의 : 내가 프로젝트를 빌드 할 maven2을 사용 1. 내 pom.xml 파일에 최대 절전 모드 플러그인을 추가 3. applicationContext.xml에 내 daos를 연결했다 :<bean id="hibernateDaoSupport" abstract="true"
class="org.springframework.orm.hibernate3.support.HibernateDaoSupport">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<bean id="hibernateHelper" class="org.springframework.orm.hibernate3.HibernateTemplate" >
<constructor-arg ref="sessionFactory"/>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
<property name="hibernateManagedSession" value="true"/>
</bean>
<bean class="com.jmt.model.UserEntity"/>
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver" />
<bean
class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
<property name="order" value="1" />
</bean>
<bean
class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping">
<property name="order" value="2" />
</bean>
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename"><value>messages</value></property>
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="org.postgresql.Driver"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<property name="poolPreparedStatements" value="true"/>
<property name="defaultAutoCommit" value="true"/>
<property name="maxActive" value="100"/>
<property name="maxIdle" value="30"/>
<property name="maxWait" value="1000"/>
<property name="removeAbandoned" value="true"/>
<property name="removeAbandonedTimeout" value="60"/>
<property name="logAbandoned" value="true"/>
<property name="testOnBorrow" value="false"/>
<property name="testWhileIdle" value="true"/>
<property name="timeBetweenEvictionRunsMillis" value="10000"/>
<property name="minEvictableIdleTimeMillis" value="60000"/>
</bean>
<tx:annotation-driven mode="aspectj" transaction-manager="transactionManager"/>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.query.substitutions">true 'Y', false 'N'</prop>
<prop key="hibernate.jdbc.batch_size">15</prop>
<prop key="hibernate.connection.isolation">2</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>com.jmt.model</value>
<value>com.jmt.hibernate.dao</value>
</list>
</property>
</bean>
<bean id="userDao" class="com.jmt.hibernate.dao.UserDaoImpl">
<constructor-arg value="com.jmt.hibernate.dao.UserDaoImpl"/>
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
4. 필터를 추가했다. 즉 제대로 세션 주입 바라고 내 web.xml의 :
<filter>
<filter-name>sessionLoadingFilter</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>
내가 적은 층이 뭔가 일을 할 것이라고 기대하고, 또 관리자에 추가하지 않은를 ...
어떤 도움/아이디어 것 매우 감사!
@ new 연산자를 사용하여 GenericDaoImpl의 새 인스턴스를 만드시겠습니까 ?? –
아니, 내 dao 콩 내 applicationContext.xml 하단에 선언 된 이후로 봄을 관리 할 것으로 기대합니다 – kalinear