初次接触Hibernate，老是出现 Unable to read XML的错误
hibernate.cfg.xml如下：<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="connection.url">
jdbc:mysql://localhost:3306/demo
</property>
<property name="connection.username">root</property>
<property name="connection.password">123456</property>
<property name="connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="myeclipse.connection.profile">
testDriver
</property>
<mapping resource="model/Xsb.hbm.xml" />
</session-factory>
</hibernate-configuration>
Xsb.hbm.xml文件如下：
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd ">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="model.Xsb" table="XSB" >
<id name="xh" type="java.lang.String">
<column name="XH" length="10" />
<generator class="assigned" />
</id>
<property name="xsm" type="java.lang.String">
<column name="XSM" length="20" not-null="true" />
</property>
</class>
</hibernate-mapping>
这些配置文件了，POJO类了什么的都是MyEclipse 10.6自动生成的…………
错误如下：
2013-4-27 20:41:13 org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.1.Final}
2013-4-27 20:41:13 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.1.4.Final}
2013-4-27 20:41:13 org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
2013-4-27 20:41:13 org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
2013-4-27 20:41:13 org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
2013-4-27 20:41:13 org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
2013-4-27 20:41:13 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: model/Xsb.hbm.xml
%%%% Error Creating SessionFactory %%%%
org.hibernate.InvalidMappingException: Unable to read XML
at org.hibernate.internal.util.xml.MappingReader.readMappingDocument(MappingReader.java:109)
at org.hibernate.cfg.Configuration.add(Configuration.java:478)
at org.hibernate.cfg.Configuration.add(Configuration.java:474)
at org.hibernate.cfg.Configuration.add(Configuration.java:647)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:730)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2109)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2081)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2061)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2014)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1929)
at session.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:31)
at test.Tester.main(Tester.java:11)
Caused by: org.dom4j.DocumentException: http://www.jboss.org/dtd/hibernate/hibernate-mapping-3.0.dtd%20 Nested exception: http://www.jboss.org/dtd/hibernate/hibernate-mapping-3.0.dtd%20
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
at org.hibernate.internal.util.xml.MappingReader.readMappingDocument(MappingReader.java:78)
... 11 more
2013-4-27 20:41:14 org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
2013-4-27 20:41:14 org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
2013-4-27 20:41:14 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: model/Xsb.hbm.xml
%%%% Error Creating SessionFactory %%%%
org.hibernate.InvalidMappingException: Unable to read XML
at org.hibernate.internal.util.xml.MappingReader.readMappingDocument(MappingReader.java:109)
at org.hibernate.cfg.Configuration.add(Configuration.java:478)
at org.hibernate.cfg.Configuration.add(Configuration.java:474)
at org.hibernate.cfg.Configuration.add(Configuration.java:647)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:730)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2109)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2081)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2061)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2014)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1929)
at session.HibernateSessionFactory.rebuildSessionFactory(HibernateSessionFactory.java:70)
at session.HibernateSessionFactory.getSession(HibernateSessionFactory.java:54)
at test.Tester.main(Tester.java:11)
Caused by: org.dom4j.DocumentException: http://www.jboss.org/dtd/hibernate/hibernate-mapping-3.0.dtd%20 Nested exception: http://www.jboss.org/dtd/hibernate/hibernate-mapping-3.0.dtd%20
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
at org.hibernate.internal.util.xml.MappingReader.readMappingDocument(MappingReader.java:78)
... 12 more
Exception in thread "main" java.lang.NullPointerException
at test.Tester.main(Tester.java:13)
HibernateSessionFactory如下：
package session;Hibernate 异常 --------------------编程问答--------------------
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
/**
* Configures and provides access to Hibernate sessions, tied to the
* current thread of execution. Follows the Thread Local Session
* pattern, see {@link http://hibernate.org/42.html }.
*/
@SuppressWarnings("deprecation")
public class HibernateSessionFactory {
/**
* Location of hibernate.cfg.xml file.
* Location should be on the classpath as Hibernate uses
* #resourceAsStream style lookup for its configuration file.
* The default classpath location of the hibernate config file is
* in the default package. Use #setConfigFile() to update
* the location of the configuration file for the current session.
*/
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
private static Configuration configuration = new Configuration();
private static org.hibernate.SessionFactory sessionFactory;
private static String configFile = CONFIG_FILE_LOCATION;
static {
try {
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err
.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
private HibernateSessionFactory() {
}
/**
* Returns the ThreadLocal Session instance. Lazy initialize
* the <code>SessionFactory</code> if needed.
*
* @return Session
* @throws HibernateException
*/
public static Session getSession() throws HibernateException {
Session session = (Session) threadLocal.get();
if (session == null || !session.isOpen()) {
if (sessionFactory == null) {
rebuildSessionFactory();
}
session = (sessionFactory != null) ? sessionFactory.openSession()
: null;
threadLocal.set(session);
}
return session;
}
/**
* Rebuild hibernate session factory
*
*/
public static void rebuildSessionFactory() {
try {
configuration.configure(configFile); sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err
.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
/**
* Close the single hibernate session instance.
*
* @throws HibernateException
*/
public static void closeSession() throws HibernateException {
Session session = (Session) threadLocal.get();
threadLocal.set(null);
if (session != null) {
session.close();
}
}
/**
* return session factory
*
*/
public static org.hibernate.SessionFactory getSessionFactory() {
return sessionFactory;
}
/**
* return session factory
*
* session factory will be rebuilded in the next call
*/
public static void setConfigFile(String configFile) {
HibernateSessionFactory.configFile = configFile;
sessionFactory = null;
}
/**
* return hibernate configuration
*
*/
public static Configuration getConfiguration() {
return configuration;
}
}
目录结构
PS：文件包也都是MyEclipse自己添加的。 --------------------编程问答-------------------- 是不是缺少读取xml的jar包？
dtd文件是否在本地？ --------------------编程问答-------------------- "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd ">//看到dtd后面的空格没有？解析不了 --------------------编程问答-------------------- <property name="myeclipse.connection.profile"> testDriver</property>
一般不加为好 --------------------编程问答-------------------- 你先弄个空的hibernate配置文件，最好从hibernate的官网下载的demo中去，然后试一试，如果好着，然后在修改里面内容为你的xml内容。
怀疑还是你的xml中有些发容易发现的错误！ --------------------编程问答-------------------- 请问楼主这个问题解决了吗
补充：Java , Web 开发
