休眠：文档无效：找不到语法 [英] Hibernate: Document is invalid: no grammar found

问题描述

 配置配置=新配置（）;使用下面的代码实例化Hibernate： 
 configuration.configure（）; 
 serviceRegistry = new ServiceRegistryBuilder（）。applySettings（
 configuration.getProperties（））。buildServiceRegistry（）; 
 sessionFactory = configuration.buildSessionFactory（serviceRegistry）; 
  

我有以下例外情况：

org.xml.sax.SAXParseException：Document无效：找不到语法，
org.xml.sax.SAXParseException：文档根元素
hibernate-configuration，必须匹配DOCTYPE根目录null。
导致：org.hibernate.MappingException：无效配置
在org.hibernate.cfg.Configuration.doConfigure（Configuration.java:2014）
在org.hibernate.cfg.Configuration.configure （Configuration.java:1931）
在org.hibernate.cfg.Configuration.configure（Configuration.java:1910）
在com.soccer.system.HibernateUtil。（HibernateUtil.java:23）
... 1 more
导致：org.xml.sax.SAXParseException：文档无效：找不到语法。

在Hibernate 4.1.6中使用以下 hibernate.cfg.xml 文件：

 <？xml version ='1.0'encoding ='utf-8'？> 
 
< hibernate-configuration 
 xmlns =http://www.hibernate.org/xsd/hibernate-configuration
 xsi：schemaLocation =http：// www .hibernate.org / xsd / hibernate-configuration hibernate-configuration-4.0.xsd
 xmlns：xsi =http://www.w3.org/2001/XMLSchema-instance> 
< session-factory> 
 <！ - 数据库连接设置 - > 
< property name =connection.driver_class> org.apache.derby.jdbc.ClientDriver< / property> 
< property name =connection.url> jdbc：derby：// localhost：1527 / K：\db< / property> 
< property name =connection.username>< / property> 
< property name =connection.password>< / property> 
 
 <！ -  JDBC连接池（使用内置） - > 
< property name =connection.pool_size> 1< / property> 
 
 <！ -   -  SQL方言 - > 
< property name =dialect> org.hibernate.dialect.DerbyDialect< / property> 
 
 <！ - 启用Hibernate的自动会话上下文管理 - > 
< property name =current_session_context_class>线程< / property> 
 
 <！ - 禁用二级缓存 - > 
< property name =cache.provider_class> org.hibernate.cache.internal.NoCacheProvider< / property> 
 
 <！ - 将所有执行的SQL回复到stdout  - > 
< property name =show_sql> true< / property> 
 
 <！ - 在启动时删除并重新创建数据库模式 - > 
< property name =hbm2ddl.auto>更新< / property> 
< / session-factory> 
< / hibernate-configuration> 
  

我能做些什么来消除此异常？

解决方案

添加行

 <！DOCTYPE hibernate-configuration PUBLIC 
 -  // Hibernate / Hibernate配置DTD 3.0 // EN
http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd> 
  

作为第二行（在xml版本之后和< hibernate -configuration> 标签，然后它就可以工作了。

When I instantiate Hibernate using the following code:

        Configuration configuration = new Configuration();
        configuration.configure();
        serviceRegistry = new ServiceRegistryBuilder().applySettings(
                configuration.getProperties()).buildServiceRegistry();
        sessionFactory = configuration.buildSessionFactory(serviceRegistry);

I got the following exceptions:

org.xml.sax.SAXParseException: Document is invalid: no grammar found., org.xml.sax.SAXParseException: Document root element "hibernate-configuration", must match DOCTYPE root "null". Caused by: org.hibernate.MappingException: invalid configuration at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2014) at org.hibernate.cfg.Configuration.configure(Configuration.java:1931) at org.hibernate.cfg.Configuration.configure(Configuration.java:1910) at com.soccer.system.HibernateUtil.(HibernateUtil.java:23) ... 1 more Caused by: org.xml.sax.SAXParseException: Document is invalid: no grammar found.

I use the following hibernate.cfg.xml file with Hibernate 4.1.6:

<?xml version='1.0' encoding='utf-8'?>

<hibernate-configuration
    xmlns="http://www.hibernate.org/xsd/hibernate-configuration"
    xsi:schemaLocation="http://www.hibernate.org/xsd/hibernate-configuration hibernate-configuration-4.0.xsd"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <session-factory>
        <!-- Database connection settings -->
        <property name="connection.driver_class">org.apache.derby.jdbc.ClientDriver</property>
        <property name="connection.url">jdbc:derby://localhost:1527/K:\db</property>
        <property name="connection.username"></property>
        <property name="connection.password"></property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.DerbyDialect</property>

        <!-- Enable Hibernate's automatic session context management -->
        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache -->
        <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <property name="hbm2ddl.auto">update</property>
    </session-factory>
</hibernate-configuration>

What can I do to eliminate this exception?

解决方案

Add the line

<!DOCTYPE hibernate-configuration PUBLIC
      "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
      "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd" >

as the second line (after the xml version and before the <hibernate-configuration> tag. Then it should work.

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