Question

java.lang.IllegalArgumentException: No [EntityType] was found for the key class [] in the Metamodel - please verify that the [Entity] class was referenced in persistence.xml using a specific <class>  </class> property or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element.
    at org.eclipse.persistence.internal.jpa.metamodel.MetamodelImpl.entityEmbeddableManagedTypeNotFound(MetamodelImpl.java:173)

实体类：

@Entity
@Table(name="temp_param")
public class ParamConfiguration implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(name = "param_group")
private String paramGroup;
public String getParamGroup() {
    return paramGroup;
}
public void setParamGroup(String paramGroup) {
    this.paramGroup = paramGroup;
}

DAO代码：

 CriteriaQuery<ParamConfiguration> cq = entityManager
                .getCriteriaBuilder()
                .createQuery(ParamConfiguration.class);
     final Root<ParamConfiguration> ac = cq.from(ParamConfiguration.class);
     cq.select(ac);
     TypedQuery<ParamConfiguration> tq=entityManager.createQuery(cq);
     List<ParamConfiguration> AClist=tq.getResultList();

persistance xml：

    <persistence-unit name="serCoupons_Cdm" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <non-jta-data-source>java:/comp/env/jdbc/CDM</non-jta-data-source>


    <class>net.odcorp.sas.mrm.beans.AffinityConfiguration</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>

任何人都可以帮我这个....是@entity类必须拥有数据库表中的所有列。

仅供参考我使用Teradata作为DB，Spring，JPA，JSF。

Answer 1

您的ParamConfiguration实体未列在persistence.xml文件中，您将选项exclude-unlisted-classes设置为true

将其添加到persistence.xml文件中：

<class>net.odcorp.sas.mrm.beans.ParamConfiguration</class>

确保包装正常。

Answer 2

在persistence.xml文件中尝试此操作

<persistence-unit name="serCoupons_Cdm" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<non-jta-data-source>jdbc/CDM</non-jta-data-source>
<exclude-unlisted-classes>false<exclude-unlisted-classes/>

exclude-unlisted-classes的默认值为true。或者如果设置为true，则需要手动指定标记以列出实体类

<class>com.package.Class</class>

Answer 3

我有同样的问题，但就我而言，我错过了 @Table注释。另外在我的代码中没有使用@Column注释，我在@Id下面使用@GeneratedValue（strategy = GenerationType.IDENTITY）。它适用于我而不使用

    <exclude-unlisted-classes>true</exclude-unlisted-classes>

我可以提供我的源代码，因为我刚刚用它来了解JPA。

没有为Metamodel中的密钥类[]找到[EntityType] - 请验证persistence.xml

3 个答案: