java - org.hibernate.NonUniqueObjectException。到底是什么原因呢？-6ren

java - org.hibernate.NonUniqueObjectException。到底是什么原因呢？

转载作者：行者123 更新时间：2023-12-01 23:35:47

在我的模型中有3个实体(实际上超过3个，但实际上是3个实体处于这种情况)

Candidate
Vacancy
Event

它们都具有多对多的关系(候选人可以有可能的空缺和许多 Activity ，空缺......候选人和......事件......)。

如果我更新候选人 - 好的结果。如果我更新空缺 - 好的结果但是如果我更新事件我有 org.hibernate.NonUniqueObjectException

当我更改 Activity 中的空缺集合时会显示。如果我评论地方，我改变事件的空缺，我没有问题(在我的代码中放置一个)转到代码:模型映射:

职位空缺:

@Entity
@Table(name = "vacancy")
@XmlRootElement(name="vacancy")
public class Vacancy {

    private Integer id;

    private String name;

    private String description;

    private Date date;

    private User author;

    @XmlTransient
    private Set<Candidate> candidates = new HashSet<Candidate>();
    private Set<VacancyStatus> statusList = new HashSet<VacancyStatus>();
    private Set<Skill> skills = new HashSet<Skill>();
    private Set<Note> comments = new HashSet<Note>();
    private Set<Event> events = new HashSet<Event>();

    public Vacancy() {
        super();
    }

    @ManyToMany(mappedBy = "vacancies", fetch = FetchType.EAGER)
    public Set<Event> getEvents() {
        return events;
    }

    public void setEvents(Set<Event> events) {
        this.events = events;
    }




    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }



    @ManyToMany(mappedBy = "vacancies", fetch = FetchType.EAGER)
    public Set<Candidate> getCandidates() {
        return candidates;
    }

    public void setCandidates(Set<Candidate> candidates) {
        this.candidates = candidates;
    }


    @Override
    public boolean equals(Object obj) {
        if(obj!= null && ((Vacancy)obj).getId() == id ){
            return true;
        }
        return false;
    }
    @Override
    public int hashCode() {
        Integer id = getId();
        return id != null ? id.intValue() : super.hashCode();
    }
    ...
}

候选人:

@Entity
@Table(name = "candidate")
@XmlRootElement(name = "candidate")
public class Candidate extends Person {

    @Size(min=3,max=12)
    @Pattern(regexp="[0-9]*",message="phone format must be without + and - (for example: 89123353456)")
    private String phone;

    @Past
    private Date date;

    private User author;

    @Size(min=4, max=100)
    @URL()
    private String resumeUrl;

    private List<CandidateStatus> statusList = new LinkedList<CandidateStatus>();

    private Set<Vacancy> vacancies= new HashSet<Vacancy>();

    private Set<Skill> skills = new HashSet<Skill>();

    private List<Note> comments = new LinkedList<Note>();

    private Set<Event> events = new HashSet<Event>();

    public Candidate() {
        super();
    }

    @ManyToMany(mappedBy = "candidates", fetch = FetchType.EAGER)
    //@LazyCollection(LazyCollectionOption.FALSE)
    public Set<Event> getEvents() {
        return events;
    }

    public void setEvents(Set<Event> events) {
        this.events = events;
    }


    @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    @JoinTable(name = "candidate_vacancy", joinColumns = @JoinColumn(name = "candidate_id"), inverseJoinColumns = @JoinColumn(name = "vacancy_id"))
    @XmlTransient
    public Set<Vacancy> getVacancies() {
        return vacancies;
    }

    public void setVacancies(Set<Vacancy> vacancies) {
        this.vacancies = vacancies;
    }
...

}

@MappedSuperclass
public abstract class Person {

    @Size(min=3)
    @Pattern(regexp="[a-zA-Z]*")    
    private String name;

    @Size(min=3)
    @Pattern(regexp="[a-zA-Z]*")
    private String surname;

    private Integer id;

    public Person() {
    }

    public Person(String name, String surname) {
        super();
        this.name = name;
        this.surname = surname;
    }

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY )
    @Column (name = "id")
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @Column(name = "name")
    //@NotEmpty
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Column(name = "surname")
    //@NotEmpty
    public String getSurname() {
        return surname;
    }

    public void setSurname(String surname) {
        this.surname = surname;
    }
    @Override
    public boolean equals(Object obj) {
        if(obj!=null && ((Person)obj).getId() == id ){
            return true;
        }
        return false;
    }

    @Override
    public int hashCode() {
        Integer id = getId();
        return id != null ? id.intValue() : super.hashCode();
    }




}

事件:

@Entity
@Table(name = "event")
@XmlRootElement
public class Event {
    private Integer id;

    @Size(min=3 )
    @Pattern(regexp="[a-zA-Z]*")    
    private String name;

    @Size(min=5)
    @Pattern(regexp="[a-zA-Z]*")    
    private String description;

    private Date date;

    @Future
    private Date eventDate;

    private User author;

    private Set<Candidate> candidates;
    private Set<Vacancy> vacancies;

    private EventType eventType;
    private EventStatus eventStatus;

    public Event() {
        super();
    }



    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name ="id")
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }


    @Override
    public boolean equals(Object obj) {
        if(obj!=null && ((Event)obj).getId() == id ){
            return true;
        }
        return false;
    }
    @Override
    public int hashCode() {
        Integer id = getId();
        return id != null ? id.intValue() : super.hashCode();
    }

    @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    public Set<Candidate> getCandidates() {
        return candidates;
    }

    public void setCandidates(Set<Candidate> candidates) {
        this.candidates = candidates;
    }

    @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    public Set<Vacancy> getVacancies() {
        return vacancies;
    }

    public void setVacancies(Set<Vacancy> vacancies) {
        this.vacancies = vacancies;
    }
}

在我的 @Controller 类中，我编写了这样的方法:

@RequestMapping(value = "/updateEvent", method = RequestMethod.POST)
    public String updateEvent(Model model,
            @Valid @ModelAttribute("existedEvent") Event event,
            BindingResult result,
            @ModelAttribute("linkedCandidates") Set<Candidate> candidates,
            @ModelAttribute("linkedvacancies") Set<Vacancy> vacancies) {
        if (result.hasErrors()) {
            model.addAttribute("idEvent", event.getId());
            return "eventDetails";
        }
        if (vacancies != null) {
            for (Vacancy vacancy : vacancies) {
                vacancy.getEvents().add(event);
            }
        }
        if (candidates != null) {
            for (Candidate candidate : candidates) {
                candidate.getEvents().add(event);
            }
        }
        event.setVacancies(vacancies);//place ONE (if comment this line - will //work)
        event.setCandidates(candidates);
        eventService.update(event);//error here
        return "redirect:goToEventMenu";

    }

更新:

    @Transactional
    @Service
    public class EventService {
         public void update(Event event) {
            eventDao.update(event);
        }
    ....
    }

@Repository("eventDaoImpl")
public class EventDaoImpl extends DaoAbstract implements EventDao {
    @Autowired
    CandidateDao candidateDao;

    @Autowired
    VacancyDao  vacancyDao;



    @Override
    public boolean update(Event event) {
        Session session = sessionFactory.getCurrentSession();
        if (event == null) {
            return false;
        }
        session.update(event);
        return true;
    }
...
}

抱歉有很多代码/但我不知道写在这里)

堆栈跟踪:

10.09.2013 11:46:14 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [appServlet] in context with path [/ui] threw exception [Request processing failed; nested exception is org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.epam.hhsystem.model.vacancy.Vacancy#6]] with root cause
org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.epam.hhsystem.model.vacancy.Vacancy#6]
    at org.hibernate.engine.internal.StatefulPersistenceContext.checkUniqueness(StatefulPersistenceContext.java:697)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:296)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:241)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:109)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
    at org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:735)
    at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:727)
    at org.hibernate.engine.spi.CascadingAction$5.cascade(CascadingAction.java:258)
    at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:388)
    at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:331)
    at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:209)
    at org.hibernate.engine.internal.Cascade.cascadeCollectionElements(Cascade.java:418)
    at org.hibernate.engine.internal.Cascade.cascadeCollection(Cascade.java:358)
    at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:334)
    at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:209)
    at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:166)
    at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:132)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.cascadeOnUpdate(DefaultSaveOrUpdateEventListener.java:364)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:338)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:241)
    at org.hibernate.event.internal.DefaultUpdateEventListener.performSaveOrUpdate(DefaultUpdateEventListener.java:55)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
    at org.hibernate.internal.SessionImpl.fireUpdate(SessionImpl.java:786)
    at org.hibernate.internal.SessionImpl.update(SessionImpl.java:778)
    at org.hibernate.internal.SessionImpl.update(SessionImpl.java:774)
    at com.epam.hhsystem.jpa.EventDaoImpl.update(EventDaoImpl.java:45)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
    at $Proxy38.update(Unknown Source)
    at com.epam.hhsystem.services.EventService.update(EventService.java:24)
    at com.epam.hhsystem.services.EventService$$FastClassByCGLIB$$3653e1b6.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
    at com.epam.hhsystem.services.EventService$$EnhancerByCGLIB$$8266fd26.update(<generated>)
    at com.epam.hhsystem.web.controllers.EventMenuController.updateEvent(EventMenuController.java:164)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:947)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)

我注意到，如果我在事件中编写更改映射空缺，就没有问题:

@ManyToMany(/*cascade = CascadeType.ALL,*/ fetch = FetchType.EAGER)// I comment cascade
    public Set<Vacancy> getVacancies() {
        return vacancies;
    }

为什么？对于对称实体候选，此映射有效:

@ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    public Set<Candidate> getCandidates() {
        return candidates;
    }

如果我删除初始代码变体中的事件和空缺之间的关系 - 它效果很好

如果我在初始代码变体中删除事件和候选人之间的关系 - 它不起作用

更新

如果我替换合并更新，我有:

10.09.2013 13:33:08 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [appServlet] in context with path [/ui] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: Error occurred while storing entity [com.epam.hhsystem.model.vacancy.Vacancy@6]. An entity copy [com.epam.hhsystem.model.vacancy.Vacancy#6] was already assigned to a different entity [com.epam.hhsystem.model.vacancy.Vacancy@6].] with root cause
java.lang.IllegalStateException: Error occurred while storing entity )

最佳答案

查看您的代码，Candidate.getVacancies() 和 Event.getVacancies() 上都有 cascade = CascadeType.ALL。我想这就是造成问题的原因。因为在您的 Controller 中，您正在事件中设置候选者和空缺职位，然后要求 Hibernate 保留该事件。因此，Hibernate 试图通过事件对象保存一次空缺，然后通过候选对象保存空缺(反之亦然)。从候选者中删除级联将解决该问题。还可以考虑使用 session.merge() 而不是 session.update()，因为合并具有相同的功能。

关于java - org.hibernate.NonUniqueObjectException。到底是什么原因呢？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/18714065/

文章推荐： java - 简单的Java斐波那契代码问题

文章推荐： java - 为什么我的字符串变量没有被插入堆栈？

文章推荐： java - 如何在java中将动态字符串值添加到字符串数组

文章推荐： java - 为 Scanner 方法编写模式

schema.org - Schema.org、Goodrelations-vocabulary.org 和 Productontology.org 之间有什么关系？
Schema.org、Goodrelations-vocabulary.org 和 Productontology.org 之间有什么关系？ Schema.org 告知，“W3C schema.org
java - 为什么 org.ietf、org.omg、org.w3c 和 org.xml 是 POJO 的一部分？
大家好，我想知道包 org.ietf、org.omg、org.w3c 和 org 是如何实现的.xml 已进入 "official" Java classes ？例如，默认 JDK 不会包含 Apa
schema.org - DBpedia.org 本体与 Schema.org 本体
首先，我试图用来自 Schema.org 的属性定义数据库表，例如，例如，我有一个名为“JobPosting”的表，它或多或少具有与 http://schema.org/JobPosting 中定义的
java - 通过 org.w3c.dom.Element 对象作为 org.dom4j.Document 上的参数查找(将 org.w3c.dom.Element 转换为 org.dom4j.Element)
我有一个 org.w3c.dom.Document 被 org.dom4j.io.DOMReader 解析。我想通过 org.w3c.dom.Element 搜索 dom4j DOM 文档。比方说
java - 无法解析 - org.dom4j.DocumentException : org. dom4j.DocumentFactory 无法转换为 org.dom4j.DocumentFactory
我正在将我的应用程序部署到 Tomcat 6.0.20。应用程序使用 Hibernate 作为 Web 层的 ORM、Spring 和 JSF。我还从 main() 方法制作了简单的运行器来测试
deployment - 由 : org. dom4j.DocumentException 引起 : org. dom4j.DocumentFactory 无法转换为 org.dom4j.DocumentFactory
我有一个使用 hibernate > 4 的 gradle 项目。如果我在 Apache tomcat 中运行我的 war 文件，我不会收到任何错误。但是当我在 Wildfly 8.2 中部署它时，出
Android Studio : Could not find org. jacoco :org. jacoco.agent :org. gradle.testing.jacoco.plugins.JacocoPluginExtension_Decorated
我正在尝试将 JaCoCo 添加到我的 Android 以覆盖 Sonar Qube。但是在运行命令 ./gradlew jacocoTestReport 时，我收到以下错误。 Task :app:
org-mode - 在 org 模式下格式化日期
如何在 emacs 组织模式中格式化日期？例如，在下表中，我希望日期显示为“Aug 29”或“Wed, Aug 29”而不是“” #+ATTR_HTML: border="2" rules="all
org-mode - 在 org 文件中包含代码片段
我想使用 org 模式来写一本技术书籍。我正在寻找一种将外部文件中的现有代码插入到 babel 代码块中的方法，该代码块在导出为 pdf 时会提供很好的格式。例如 #+BEGIN_SRC pytho
schema.org - schema.org 中的产品类别？
用作引用:https://support.google.com/webmasters/answer/146750?hl=en 您会注意到在“产品”下有一个属性类别，此外页面下方还有一个示例: Too
schema.org - Schema.org 中的产品列表
我读了这个Google doc .它说我们不使用列表中的产品。那么对于产品列表(具有多页的类似产品的类别，如“鞋子”)，推荐使用哪种模式？我用这个: { "@context": "htt
schema.org - schema.org 数据集和维基数据之间是否存在映射？
我目前在做DBpedia数据集，想通过wikidata实现schema.org和DBpedia的映射。因此我想知道 schema.org 和 wikidata 之间是否存在任何映射。最佳答案我认为
org-mode - org-mode 表内的代码块
我爱org-tables ，我用它们来记录各种事情。我现在正在为 Nix 记录一些单行代码(在阅读了 Domen Kožar 的 excellent guide 后，在 this year's Eur
schema.org - schema.org 中的多个作者或贡献者
如果看一下 Movie在 schema.org 中输入，actor 和 actors 属性都是允许的(actor 取代 actors)。但是 author 和 contributor 属性没有等效项。
schema.org - Schema.org 中的多家餐厅
我们有一些餐厅有多个地点或分支机构。我想包含正确的 Schema.org 标记，但找不到任何允许列出多个餐厅的内容。每家餐厅都有自己的地址、电子邮件、电话和营业时间，甚至可能是“分店名称”。两个分
schema.org - Schema.org 的多个综合评级
我在一个页面中有多个综合评分片段。有没有办法让其中之一成为默认值？将显示在搜索引擎结果中的那个？谢谢大家! 更新:该网页本质上是品牌的页面。它包含品牌评论的总评分及其产品列表(每个产品的总评分)。
java - org.apache.maven.archiver.MavenArchiver.getManifest(org.apache.maven.project.MavenProject，org.apache.maven.archiver.MavenArchiveConfiguration)
我提到了一些相关的职位，但并没有解决我的问题。因为我正在使用maven-jar-plugin-2.4 jar。我正在使用JBoss Developer Studio 7.1.1 GA IDE，并且正
schema.org - 个人网站是否应该将根页面标记为 schema.org 'Person' ？
网站的根页面(即 http://example.com/ )的特殊之处在于它是默认的着陆页。它可能包含许多不同的对象类型。它可能被认为是一个网站，或者一个博客等... 但它是否也应该被标记为给定对象
org-mode - 如何隐藏一些文本不被 org-publish-* 函数发布？
我想将一些文本放入一个 org 文件中，当我将内容导出到其中一种目标类型(在本例中为 HTML)时，该文件不会发布。有什么方法可以实现这个目标吗？最佳答案您可能想要使用 :noexport: 标签
org-mode - 在 org-mode 的编号列表中的步骤之间移动
org-mode 是否有一个键绑定(bind)可以在编号/项目符号列表项之间移动，就像您可以对标题一样？喜欢的功能: org-forward-heading-same-level 大纲下一个可见标题

行者123

个人简介

我是一名优秀的程序员,十分优秀！

作者热门文章

滴滴打车优惠券免费领取

全站热门文章

首页

博学

6Ren·AI

商城

java - org.hibernate.NonUniqueObjectException。到底是什么原因呢？