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

Question

我正在使用休眠和下面的持久性.xml工作正常。但是在 eclipse 中从表中创建新的 JPA 实体后，持久性.xml给出了错误 - 元素"持久性单元"不能包含文本内容。内容类型定义为仅元素。我已经从持久性中删除了新类.xml，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>```

Answer 1

Hibernate支持自动检测，所以只需删除你的类元素并添加此属性，还要用@Entity注释来批注你的类。

<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>```

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