我正在使用Spring 3，Hibernate 3.0.6和JPA 2。
我得到LazyInitializationException：
这是服务： @服务 public class ReportServiceImpl实现ReportService { 私人ReportDAO报告DAO; 私人FieldDefDAO fieldDefDAO; 私有FieldDefService fieldDefService;
/**
*
*/
@Override
@Transactional(propagation = Propagation.REQUIRED)
public void updateReport(ReportTemplate reportTemplate, String[] fieldIds) {
logger.entry(reportTemplate);
try {
ReportTemplate existingReport = reportDAO.findById(
reportTemplate.getId(), true);
existingReport.setName(reportTemplate.getName());
existingReport.setDepartment(reportTemplate.getDepartment());
// set selected fields
if (fieldIds != null) {
existingReport.removeReportFields();
for (String fieldId : fieldIds) {
FieldDef fd = fieldDefDAO.findById(Long.parseLong(fieldId), false);
// EXCEPTION THROWN HERE (
reportTemplate.addReportField(fd, i);
}
}
reportDAO.mergeState(existingReport, false);
} catch (FocusDAOException fde) {
throw new FocusServiceException(fde);
}
logger.exit();
}
}
实体：
@Entity
@Table(name = "REPORT_TEMPLATE")
@SQLDelete(sql = "UPDATE REPORT_TEMPLATE SET deleted = 1 WHERE REPORTTEMPLATE_ID = ? and OPTLOCK = ?")
@Where(clause = "deleted <> 1")
public class ReportTemplate extends Template {
private Long id;
private Set<ReportField> reportFields = new HashSet<ReportField>();
/**
* @return the id
*/
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "REPORTTEMPLATE_ID")
public Long getId() {
return id;
}
/**
* @param id
* the id to set
*/
public void setId(Long id) {
this.id = id;
}
/**
* @return the reportFields
*/
@OneToMany(mappedBy = "reportTemplate", cascade = { CascadeType.PERSIST,
CascadeType.MERGE })
public Set<ReportField> getReportFields() {
return reportFields;
}
/**
* @param reportFields
* the reportFields to set
*/
public void setReportFields(Set<ReportField> reportFields) {
this.reportFields = reportFields;
}
/**
*
* @param field
*/
@Transient
public void addReportField(FieldDef field, int order) {
ReportField rf = new ReportField(this, field, order);
reportFields.add(rf);
field.getReportFields().add(rf);
}
/**
*
*/
public void removeReportFields() {
for (ReportField rf : reportFields) {
rf.setReportTemplate(null);
reportFields.remove(rf);
}
}
}
@Entity
@Table(name = "REPORT_FIELD", uniqueConstraints = @UniqueConstraint(columnNames = {
"REPORTFIELD_ID", "FIELDDEF_ID", "DISPLAY_ORDER" }))
public class ReportField {
private Long id;
// @OrderColumn
private FieldDef field;
private ReportTemplate reportTemplate;
private int order;
/**
*
*/
public ReportField() {}
/**
*
* @param reportTemplate
* @param field
* @param order
*/
public ReportField(ReportTemplate reportTemplate, FieldDef field, int order) {
this.reportTemplate = reportTemplate;
this.field = field;
this.order = order;
}
/**
* @return the id
*/
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "REPORTFIELD_ID")
public Long getId() {
return id;
}
/**
* @param id
* the id to set
*/
public void setId(Long id) {
this.id = id;
}
/**
* @return the field
*/
@ManyToOne
@JoinColumn(name = "FIELDDEF_ID", nullable = false)
public FieldDef getField() {
return field;
}
/**
* @param field
* the field to set
*/
public void setField(FieldDef field) {
this.field = field;
}
/**
* @return the report
*/
@ManyToOne
@JoinColumn(name = "REPORTTEMPLATE_ID", nullable = false)
public ReportTemplate getReportTemplate() {
return reportTemplate;
}
/**
* @param report
* the report to set
*/
public void setReportTemplate(ReportTemplate reportTemplate) {
this.reportTemplate = reportTemplate;
}
/**
* @return the order
*/
@Column(name = "DISPLAY_ORDER", nullable = false)
public int getOrder() {
return order;
}
/**
* @param order
* the order to set
*/
public void setOrder(int order) {
this.order = order;
}
}
配置：
<security:global-method-security
pre-post-annotations="enabled" />
<mvc:resources mapping="/resources/**" location="/resources/" />
<bean id="jspViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<!-- <property name="suffix" value=".jsp" /> -->
</bean>
<bean id="tilesViewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass">
<value>
org.springframework.web.servlet.view.tiles2.TilesView
</value>
</property>
<property name="order" value="1" />
</bean>
<bean id="tilesConfigurer"
class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
<property name="definitions">
<list>
<value>/WEB-INF/tiles/tiles.xml</value>
</list>
</property>
</bean>
<bean id="projectDS" class="org.apache.tomcat.jdbc.pool.DataSource"
destroy-method="close"
p:driverClassName="${driver.class.name}"
p:url="${url}"
p:initialSize="${initial.size}"
p:maxActive="${max.active}"
p:maxIdle="${max.idle}"
p:minIdle="${min.idle}"
p:testOnBorrow="true"
p:validationQuery="SELECT 1"
p:validationInterval="30000"
p:timeBetweenEvictionRunsMillis="30000"
p:removeAbandoned="true"
p:removeAbandonedTimeout="60"
p:logAbandoned="true"
p:abandonWhenPercentageFull="75"
p:jdbcInterceptors="ConnectionState;StatementFinalizer;ResetAbandonedTimer;SlowQueryReport(threshold=3000)"
/>
<bean id="projectEMF"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="projectDS" />
<property name="jpaVendorAdapter" ref="jpaVendorAdapter" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="projectEMF" />
<property name="dataSource" ref="projectDS" />
</bean>
<bean id="jpaVendorAdapter"
class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="database" value="SQL_SERVER" />
<property name="showSql" value="false" />
<property name="generateDdl" value="false" />
<property name="databasePlatform" value="org.hibernate.dialect.SQLServerDialect" />
</bean>
<bean id="validator"
class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" />
<bean id="auditLog" class="ca.utoronto.med.dc.focus.persistence.audit.AuditLog" />
<bean
class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<!-- focus: Edit the package name below. -->
<bean id="logoutHandlerBean"
class="ca.utoronto.med.dc.focus.security.LogoutSuccessHandlerImpl" />
<bean id="customAuthenticationFailureHandlerBean"
class="ca.utoronto.med.dc.focus.security.AuthenticationFailureHandlerImpl" />
<bean id="customAuthenticationSuccessHandlerBean"
class="ca.utoronto.med.dc.focus.security.AuthenticationSuccessHandlerImpl" />
<bean id="httpSessionEventListener"
class="ca.utoronto.med.dc.focus.security.SimpleHttpSessionEventListenerImpl" />
<mvc:annotation-driven />
<task:annotation-driven />
<tx:annotation-driven transaction-manager="transactionManager"/>
<context:component-scan base-package="ca.utoronto.med.dc.*" />
<!-- Uncomment the following section to enable Aspects -->
<!-- <aop:aspectj-autoproxy />
<bean id="authorizationMgr" class="ca.utoronto.med.dc.focus.aspect.AuthorizationMgr" />
-->
<context:annotation-config
transaction-manager="transactionManager" proxy-target-class="false" />
<util:properties id="projectProperties" location="/WEB-INF/focus.properties" />
<!--Bean to load properties file -->
<bean id="placeholderConfig"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="/WEB-INF/focus.properties" />
</bean>
<!-- mail -->
<!-- <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
<property name="host" value="${mailserver.host}" />
<property name="port" value="${mailserver.port}" />
<property name="username" value="${mailserver.username}" />
<property name="password" value="${mailserver.password}" />
</bean> -->
<!-- Configure the multipart resolver -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- one of the properties available; the maximum file size in bytes -->
<property name="maxUploadSize" value="1000000"/>
</bean>
</beans>
答案 0 :(得分：0)
如果您在view / jsp中获得异常，那么您应该在视图模式中使用open EntityManager。您需要做的就是将过滤器OpenEntityManagerInViewFilter放在web.xml中 http://static.springsource.org/spring/docs/2.5.x/api/org/springframework/orm/jpa/support/OpenEntityManagerInViewFilter.html