休眠:persistence.xml 中的错误 - 元素 'persistence-unit' 不能包含文本内容。内容类型定义为仅元素

Hibernate : Error in persistence.xml - Element 'persistence-unit' cannot contain text content. The content type is defined as element-only

我正在使用 Hibernate,下面的 persistence.xml 工作正常。但是在 Eclipse 中从 Table 创建新的 JPA 实体后,persistence.xml 给出错误 - 元素 'persistence-unit' 不能包含文本内容。内容类型定义为仅元素。我已经从 persistence.xml 中删除了新的 class,但错误仍然存​​在。

<persistence version="2.2"
    xmlns="http://xmlns.jcp.org/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd">
    <persistence-unit name="FirstJPAProject">
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
        <class>com.boi.network.test.entity.Location</class>
        <class>com.boi.network.test.entity.Supportvendor</class>
        <class>com.boi.network.test.entity.Project</class>
        <properties>
            <!-- The JDBC URL to the database instance -->
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/boi?useSSL=false&amp;useJDBCCompliantTimezoneShift=true&amp;useLegacyDatetimeCode=false&amp;serverTimezone=UTC"></property>          
            <property name="javax.persistence.jdbc.user" value="dba"></property>
            <property name="javax.persistence.jdbc.password" value="12345"></property>
        </properties>
    </persistence-unit>
</persistence>```

Hibernate 支持自动检测,因此只需删除您的 class 元素并添加此 属性,同时使用 @Entity 注释对您的 classes 进行注释。

<persistence version="2.2"
    xmlns="http://xmlns.jcp.org/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd">
    <persistence-unit name="FirstJPAProject">
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
        <!--<class>com.boi.network.test.entity.Location</class>
        <class>com.boi.network.test.entity.Supportvendor</class>
        <class>com.boi.network.test.entity.Project</class>-->
        <properties>
            <!-- The JDBC URL to the database instance -->
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/boi?useSSL=false&amp;useJDBCCompliantTimezoneShift=true&amp;useLegacyDatetimeCode=false&amp;serverTimezone=UTC"></property>          
            <property name="javax.persistence.jdbc.user" value="dba"></property>
            <property name="javax.persistence.jdbc.password" value="12345"></property>
            <property name="hibernate.archive.autodetection" value="class, hbm"/>
        </properties>
    </persistence-unit>
</persistence>```

看看这个answer