刚学hibernate出错.

JPF1024 2013-09-01 03:09:20

是一个手动创建数据表的小程序.

[ShowDB.java]



package com.hibernate;





import org.hibernate.cfg.Configuration;

import org.hibernate.tool.hbm2ddl.SchemaExport;



/**

 * 手动导出数据表

 * 

 * @author puruidong

 * @version 2013.8.30

 */



public class ShowDB {

	

	public static void main(String[]args){

			Configuration cfg = new Configuration().configure() ;//加载配置信息

			SchemaExport export = new SchemaExport(cfg); //实例化SchemaExport.

			System.out.println(export);

			export.create(true,true);//到处数据表

			

			

		

	}

}

[User.java]



package com.hibernate;



public class User {



	private int num;

	private String name;

	private int age ;

	private String address;

	//省略set/get方法

	

}

[hibernate.cfg.xml]



<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-configuration PUBLIC

	"-//Hibernate/Hibernate Configuration DTD 3.0//EN"

	"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><!-- dtd无法访问. -->

<hibernate-configuration>

	<session-factory>

		<!-- 方言 -->

     		<property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>

     		<!-- 数据库驱动 -->

     		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>

     		<!-- 数据库连接 -->

     		<property name="hibernate.connection.url">jdbc:mysql://127.0.0.1:3306/Test</property>

     		<!-- 数据库连接用户名 -->

     		<property name="hibernate.connection.username">root</property>

     		<!-- 数据库连接密码 -->

     		<property name="hibernate.connection.password">root</property>

     		<!-- 打印SQL语句 -->

     		<property name="hibernate.hbm2ddl.auto">create</property>  

     		<property name="hibernate.show_sql">true</property>

     		<property name="hibernate.format_sql">true</property>

		<mapping resource="com/hibernate/User.hbm.xml" />

		

	</session-factory>

</hibernate-configuration>

[User.hbm.xml]



<?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">

<hibernate-mapping>

	<class name="com.hibernate.User" table="Studentss" >

		<id name="num" column="num" type="int">

			<generator class="native"></generator>

		</id>

		<property name="name" type="string"  length="20">

			<column name="name"></column>

		</property>

		<property name="age" type="int">

			<column name="age"></column>

		</property>

		<property name="address" type="string"  length="200">

			<column name="address"></column>

		</property>

	</class>

</hibernate-mapping>

运行之后:
Sep 01, 2013 3:06:48 AM org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.2.Final}
Sep 01, 2013 3:06:49 AM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.2.5.Final}
Sep 01, 2013 3:06:49 AM org.hibernate.cfg.Environment <clinit>
INFO: HHH000205: Loaded properties from resource hibernate.properties: {hibernate.connection.driver_class=org.h2.Driver, hibernate.dialect=org.hibernate.dialect.H2Dialect, hibernate.max_fetch_depth=5, hibernate.format_sql=true, hibernate.generate_statistics=true, hibernate.connection.username=sa, hibernate.connection.url=jdbc:h2:mem:db1;DB_CLOSE_DELAY=-1;MVCC=TRUE, hibernate.bytecode.use_reflection_optimizer=false, hibernate.jdbc.batch_versioned_data=true, hibernate.connection.pool_size=5}
Sep 01, 2013 3:06:49 AM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Sep 01, 2013 3:06:49 AM org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
Sep 01, 2013 3:06:49 AM org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
Sep 01, 2013 3:06:49 AM org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
Exception in thread "main" org.hibernate.HibernateException: Could not parse configuration: /hibernate.cfg.xml
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2096)
at org.hibernate.cfg.Configuration.configure(Configuration.java:2008)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1987)
at com.hibernate.ShowDB.main(ShowDB.java:17)
Caused by: org.dom4j.DocumentException: null Nested exception: null
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2088)
... 3 more

跟dtd不能访问有关系吗?

...全文