java – 使用openEntityManagerInView仍然“无法懒惰地初始化角色集合”

我试图将我的一个实体返回到JSP页面,但得到以下错误“未能懒惰地初始化角色集合”.我已经添加了openEntityManagerInView过滤器(假设它允许实体管理器在视图中保持打开状态?)但仍然出现此错误.

我的应用程序是使用java config no xml配置的.

以下是我的调度员服务.你可以看到我添加了openEntityManagerInView过滤器.

任何想法为什么会这样?我已经检查过stackoverflow上的类似问题,并且对所提供的解决方案没有运气.

public class DispatcherServletInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

@Override
public void onStartup(ServletContext servletContext) throws ServletException {

    registerOpenEntityManagerInViewFilter(servletContext);
    super.onStartup(servletContext);

}

private void registerOpenEntityManagerInViewFilter(ServletContext servletContext) {
    OpenEntityManagerInViewFilter viewFilter = new OpenEntityManagerInViewFilter();
    viewFilter.setEntityManagerFactoryBeanName("entityManagerFactory");
    FilterRegistration.Dynamic registration = servletContext.addFilter("openEntityManagerInView",
            new OpenEntityManagerInViewFilter());
    registration.addMappingForUrlPatterns(null, false, "/*");

}

@Override
protected Class<?>[] getRootConfigClasses() {
    return new Class<?>[]{Config.class, SecurityConfig.class};
}

@Override
protected Class<?>[] getServletConfigClasses() {
    return new Class<?>[]{WebConfig.class};
}

@Override
protected String[] getServletMappings() {
    return new String[]{"/"};
}

}

以下是有问题的实体.我省略了getter和setter.

@Entity
@Table(name = "film")
public class Film {

@Id
@GeneratedValue
@Column(name = "film_id")
private int filmId;
@Column(name = "title")
private String title;
@Column(name = "description")
private String description;
@Column(name = "release_year")
private int releaseYear;
@ManyToOne
@JoinColumn(name = "language_id")
private Language language;
@ManyToOne
@JoinColumn(name = "original_language_id")
private Language originalLanguage;
@Column(name = "rental_duration")
private int rentalDuration;
@Column(name = "rental_rate")
private double rentalRate;
@Column(name = "length")
private int length;
@Column(name = " replacement_cost")
private double replacementCost;
@Column(name = "rating")
private String rating;
@Column(name = "special_features")
private String specialFeatures;
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "last_update")
private Date lastUpdate;
@OneToMany(mappedBy = "film", cascade = CascadeType.ALL)
private List<Inventory> inventories;

.........
}

下面是我的JPA配置.

@Configuration
@EnableTransactionManagement
public class Config {

@Bean(name = "entityManagerFactory")
public EntityManagerFactory entityManagerFactory() {
    LocalContainerEntityManagerFactoryBean emf = new LocalContainerEntityManagerFactoryBean();
    HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new HibernateJpaVendorAdapter();
    HibernateJpaDialect hibernateJpaDialect = new HibernateJpaDialect();
    emf.setDataSource(dataSource());
    emf.setPackagesToScan("com");
    emf.setJpaDialect(hibernateJpaDialect);
    emf.setJpaVendorAdapter(hibernateJpaVendorAdapter);
    /* Map<String,String> props = new HashMap<>();
     props.put("hibernate.show_sql", "true");
     emf.setJpaPropertyMap(props);*/
    emf.afterPropertiesSet();
    return emf.getObject();
}

@Bean(name = "transactionManager")
public PlatformTransactionManager transactionManager() throws IOException {
    JpaTransactionManager jtm
            = new JpaTransactionManager();
    jtm.setEntityManagerFactory(entityManagerFactory());
    jtm.setDataSource(dataSource());
    return jtm;
}

@Bean(name = "dataSource")
public DriverManagerDataSource dataSource() {
    DriverManagerDataSource dds = new DriverManagerDataSource();
    dds.setDriverClassName("com.mysql.jdbc.Driver");
    dds.setUrl("jdbc:mysql://localhost/test");
    dds.setUsername("username");
    dds.setPassword("password");
    return dds;
}

}

下面是我的网络配置

@Configuration
@EnableWebMvc
@ComponentScan("com")
public class WebConfig {

@Bean
public ViewResolver viewResolver() {
    InternalResourceViewResolver vr = new InternalResourceViewResolver();
    vr.setViewClass(JstlView.class);
    vr.setPrefix("/WEB-INF/jsp/");
    vr.setSuffix(".jsp");
    vr.setExposeContextBeansAsAttributes(true);
    return vr;
}

}

以下是我的安全配置.

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

@Autowired
public void configureAuthenticationManagerBuilder(AuthenticationManagerBuilder auth) throws Exception {
    auth
            .inMemoryAuthentication()
            .withUser("user").password("password").roles("USER");
}

@Override
protected void configure(HttpSecurity http) throws Exception {
      http.authorizeRequests()
     .antMatchers("/**").access("hasRole('ROLE_USER')")
     .and().formLogin().loginPage("/login")
     .usernameParameter("username")
     .passwordParameter("password")
     .defaultSuccessUrl("/index", true).failureUrl("/login?error")
     .loginProcessingUrl("/j_spring_security_check");

}

@Override
public void configure(WebSecurity web) throws Exception {
    web.ignoring().antMatchers("/login");
}

}

我的Dao课程如下.

@Repository
public class FilmDao {

    @PersistenceContext
    private EntityManager em;

    public Film getFilm(int filmId) {
        Film film = em.find(Film.class, filmId);
        return film;
    }

}

我的控制器调用下面的服务类.

@Service
public class FilmService {

    @Autowired
    private FilmDao filmDao;

   @Transactional
    public Film getFilm(int filmId) {
        Film film = filmDao.getFilm(filmId);
        return film;
    }

}

下面的堆栈跟踪.

14:48:30,416 ERROR [io.undertow.request] (default task-6) UT005023: Exception handling request to /test-app/WEB-INF/jsp/update_inventory.jsp: org.apache.jasper.JasperException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.jm.sakila.entity.Film.inventories, could not initialize proxy - no Session
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:410) [jastow-1.0.0.Final.jar:1.0.0.Final]
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:326) [jastow-1.0.0.Final.jar:1.0.0.Final]
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259) [jastow-1.0.0.Final.jar:1.0.0.Final]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:82) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchToPath(ServletInitialHandler.java:192) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.spec.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:160) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168) [spring-webmvc-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303) [spring-webmvc-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1244) [spring-webmvc-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027) [spring-webmvc-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971) [spring-webmvc-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) [spring-webmvc-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) [spring-webmvc-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:130) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:178) [spring-orm-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:57) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) [spring-security-web-3.2.9.RELEASE.jar:3.2.9.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) [spring-web-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) [spring-web-4.2.2.RELEASE.jar:4.2.2.RELEASE]
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:85) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:63) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:261) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:247) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:76) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:166) [undertow-servlet-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:197) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:759) [undertow-core-1.1.0.Final.jar:1.1.0.Final]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_45]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_45]
    at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]
Caused by: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.jm.sakila.entity.Film.inventories, could not initialize proxy - no Session
    at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:576) [hibernate-core-4.3.11.Final.jar:4.3.11.Final]
    at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:215) [hibernate-core-4.3.11.Final.jar:4.3.11.Final]
    at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:555) [hibernate-core-4.3.11.Final.jar:4.3.11.Final]
    at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:143) [hibernate-core-4.3.11.Final.jar:4.3.11.Final]
    at org.hibernate.collection.internal.PersistentBag.iterator(PersistentBag.java:294) [hibernate-core-4.3.11.Final.jar:4.3.11.Final]
    at org.apache.taglibs.standard.tag.common.core.ForEachSupport.toIterator(ForEachSupport.java:72) [jboss-jstl-api_1.2_spec-1.1.2.Final.jar:1.1.2.Final]
    at org.apache.taglibs.standard.tag.common.core.ForEachSupport.prepare(ForEachSupport.java:66) [jboss-jstl-api_1.2_spec-1.1.2.Final.jar:1.1.2.Final]
    at javax.servlet.jsp.jstl.core.LoopTagSupport.doStartTag(LoopTagSupport.java:241) [jboss-jstl-api_1.2_spec-1.1.2.Final.jar:1.1.2.Final]
    at org.apache.jsp.WEB_002dINF.jsp.update_005finventory_jsp._jspx_meth_c_005fforEach_005f1(update_005finventory_jsp.java:231)
    at org.apache.jsp.WEB_002dINF.jsp.update_005finventory_jsp._jspx_meth_c_005fif_005f1(update_005finventory_jsp.java:194)
    at org.apache.jsp.WEB_002dINF.jsp.update_005finventory_jsp._jspService(update_005finventory_jsp.java:83)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:69) [jastow-1.0.0.Final.jar:1.0.0.Final]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:366) [jastow-1.0.0.Final.jar:1.0.0.Final]
    ... 86 more

谢谢.

问题很简单.

在你的jsp中,你是从公共电影getFilm返回的电影(int filmId)

在jsp页面中,您可能会执行以下操作:

<jsp:getProperty name="film" property="inventories" />

你正试图获得invetories但它是延迟加载和会话已经关闭(@Transactional注释打开会话和方法完成时关闭)

因此,您要么创建新的方法来获取filmId的inverntories,要么让它急切加载:

@OneToMany(fetch=FetchType.EAGER, mappedBy = "film", cascade = CascadeType.ALL)
private List<Inventory> inventories;

翻译自:https://stackoverflow.com/questions/34438496/using-openentitymanagerinview-still-getting-failed-to-lazily-initialize-a-colle

原文 

https://codeday.me/bug/20190111/500577.html

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