Question

我有2个相关的Entity类，并且想要定义另一个非Entity类，只包含2个Entity类，这样我就可以使用HQL来加载带有Join的2个Entity Classes。以下是代码：

@Entity
@Table(name = "Conversation", schema = "aaa", catalog = "xxx")
public class Conversation implements Serializable {

    private String conversationGuid;

...
}

@Entity
@Table(name = "Ticket", schema = "dbo", catalog = "MyTime")
public class Ticket implements Serializable {

    private String ticketGuid;

    private String conversationGuid;
...

}

非实体POJO：

public class Conversation_Ticket {
    private Conversation convo;
    private Ticket ticket;

    public Conversation_Ticket(Conversation convo, Ticket ticket) {
        super();
        this.convo = convo;
        this.ticket = ticket;
    }   
}

DAO进行HQL查询：

Configuration cfg = new Configuration().addFile("/Users/csi/git/mytime-acr/src/main/resources/Conversation_Ticket.hbm.xml");

Query query = getSession().createQuery(
        "select new Conversation_Ticket(convo, tic)"
        + "from Conversation as convo left outer join fetch Ticket as tic on convo.Conversation_GUID = tic.Conversation_GUID where agentGuidCurrent = :agentGuid and workState = :workState");

query.setParameter("agentGuidCurrent", agentGuid);
query.setParameter("workState", workState);
List list = query.list();

当调用createQuery（）时，它基本上抛出以下异常： org.hibernate.hql.internal.ast.QuerySyntaxException：加入的路径！ [从com.cs.mytime.acr.model.Conversation中选择新的Conversation_Ticket（convo，tic）作为convo left outer join fetch Ticket as tic on convo.Conversation_GUID = tic.Conversation_GUID where agentGuidCurrent =：agentGuid and workState =：workState] < / p>

似乎Hibernate只是不识别Conversation_Ticket POJO并期望Conversation＆amp;之间的某些对象级关系。票。

Conversation_Ticket.hbm.xml定义如下：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
 "-//Hibernate/Hibernate Mapping DTD//EN"
 "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 
<hibernate-mapping>
    <import class="com.cs.mytime.acr.model.aggregate.Conversation_Ticket" />
</hibernate-mapping>

我确实尝试将Conversation_Ticket.hbm.xml作为映射资源放在hibernate.cfg.xml中，如下所示：

<mapping resource="/Users/csi/git/mytime-acr/src/main/resources/Conversation_Ticket.hbm.xml"/>

但它抱怨找不到Conversation_Ticket.hbm.xml，即使我在我的环境的CLASSPATH中定义了/ Users / csi / git / mytime-acr / src / main / resources。

感谢所有能给我一些指导如何解决这个问题的人。感谢。

Answer 1

您有一个特殊的目录布局。假设src是Eclipse中的源文件夹，它会将所有非Java文件复制到classes或bin目录（或者您为编译类选择的任何目录名），并且Conversation_Ticket.hbm.xml应该是直接在src下，因为您告诉Hibernate从classpath的根目录加载它：

cfg.addResource("Conversation_Ticket.hbm.xml");

如果将它放在main / resources中，加载它的代码应为

cfg.addResource("main/resources/Conversation_Ticket.hbm.xml");

为什么不使用自己的包层次结构，因此使用以下目录树：

src
  com
    rcook
      myapp

使用＆＃34;选择新＆＃34;在HQL中加入抱怨＆＃34;期望加入＆＃34;

1 个答案: