文档根元素“persistence”必须与DOCTYPE根元素“null”匹配。为了坚持。xml JPA

Question

我得到以下错误

文档根元素“persistence”必须与DOCTYPE根元素“null”匹配

下面是导致它的XML文件。

 <?xml version="1.0" encoding="UTF-8" ?>
<persistence 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_1.xsd" version="2.1">

        <persistence-unit name="my-persistence">
            <description>Persistence Unit</description>
            <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
            <mapping-file>WEB-INF/config/application-context.xml</mapping-file>
            <!--<jar-file>packedEntity.jar</jar-file>-->
            <class>domain.Applicant</class>
            <class>testScrEntry</class>
            <properties>
                <property name="javax.persistence.jdbc.url" value="oracle.jdbc.OracleDriver"/>
                <property name="javax.persistence.jdbc.user" value="user"/>
                <property name="javax.persistence.jdbc.password" value="password"/>
            </properties>
        </persistence-unit>

    </persistence>

堆栈痕迹

 o.s.w.c.s.XmlWebApplicationContext WARN: Exception encountered during 
 context initialization - cancelling refresh attempt: 
 org.springframework.beans.factory.BeanDefinitionStoreException: Failed 
 to parse configuration class [configuration.JpaConfiguration]; nested 
 exception is java.util.InvalidPropertiesFormatException:  
 org.xml.sax.SAXParseException: Document root element "persistence", must     
 match DOCTYPE root "`null"

当然，我在谷歌上搜索了错误，它告诉我添加我所做的，它看起来像：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE persistence PUBLIC xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
 http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">

    <persistence-unit name="my-pu">
        <description>Persistence Unit</description>
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
        <!--<mapping-file>application-context.xml</mapping-file>-->
        <!--<jar-file>packedEntity.jar</jar-file>-->
        <class>domain.Applicant</class>
        <class>applicant.testScrEntry</class>
        <properties>
            <property name="javax.persistence.jdbc.url" value="oracle.jdbc.OracleDriver"/>
            <property name="javax.persistence.jdbc.user" value="user"/>
            <property name="javax.persistence.jdbc.password" value="password"/>
        </properties>
    </persistence-unit>

</persistence>

然而，上面也没有说文件必须以

公共标识符必须以单引号或双引号字符开头

---------------------更新1------------------------------

我已经尝试过了：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE persistence PUBLIC
        "http://xmlns.jcp.org/xml/ns/persistence"
        "http://www.w3.org/2001/XMLSchema-instance"
        "http://xmlns.jcp.org/xml/ns/persistence
        http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd" version="2.1">

错误::org.xml.sax.SAXParseExcture：公共标识符必须以单引号或双引号字符开头。

和

<?xml version="1.0" encoding="UTF-8" ?>
<persistence 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_1.xsd"
             version="2.1">

错误：文档根元素“persistence”必须与DOCTYPE root“null”匹配

和

<?xml version="1.0" encoding="UTF-8" ?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

文档根元素"持久性"，必须匹配DOCTYPE根"null"。




Answer 1

您的第二个“XML”文档是XSD和DTD结构的混乱，最终结果是一个根本不是XML的文档——格式不好，更不用说有效了。

您的第一个XML文档对通过@schemaLocation声明的XSD有效。错误消息是基于DTD的，而不是基于XSD的。根据@schemaLocation中暗示的XSD解析它，您就可以了。