找不到元素“持久性”的声明

Question

将persistence.xml放在eclipse中的项目的类路径中，因为在错误之前是找不到该文件。现在给出此错误：

原因：javax.persistence.PersistenceException：无效的persistence.xml。解析XML时出错[行：-1，列：-1]：cvc-
elt.1：找不到元素’persistence’的声明

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.1"
             xsi:schemalocation="http://java.sun.com/xml/ns/persistence
                                 http://java.sun.com/xml/ns/persistence/persistence_2_1.xsd">
    <persistence-unit name="default" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
            <property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/Automoveis" />
            <property name="javax.persistence.jdbc.user" value="postgres" />
            <property name="javax.persistence.jdbc.password" value="1234" />
            <property name="javax.persistence.jdbc.driver" value="org.postgresql.jdbc.Driver" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.format_sql" value="true" />
            <property name="hibernate.hbm2ddl.auto" value="create" />
        </properties>
    </persistence-unit>
</persistence>

Answer 1

解决了！

我不知道到底出了什么问题，但是效果很好：

<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">

<persistence-unit name="default" transaction-type="RESOURCE_LOCAL">    
    <provider>org.hibernate.ejb.HibernatePersistence</provider>

    <properties>    
        <property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver" />    
        <property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/Automoveis" />    
        <property name="javax.persistence.jdbc.user" value="postgres" />    
        <property name="javax.persistence.jdbc.password" value="1234" />    
        <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />               
        <property name="hibernate.hbm2ddl.auto" value="update" />    
        <property name="hibernate.show_sql" value="true" />    
        <property name="hibernate.format_sql" value="true"/>    
    </properties>    
</persistence-unit>