使用hibernate连接数据库时出错 [英] Error connecting with database using hibernate
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问题描述
我正在尝试使用hibernate在我的数据库上创建一个表。这里是我的代码
java对象
package com.digitek.students;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table（name =studentInfo）
public class StudentInfo {
@Id
private int rollNo;
public int getRollNo（）{
return rollNo;
}
public void setRollNo（int rollNo）{
this.rollNo = rollNo;
}
public String getName（）{
return name;
}
public void setName（String name）{
this.name = name;
}
私人字符串名称;
}
数据访问对象
package com.digitek.students;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
导入org.hibernate.cfg.Configuration;
public class Main {
public static void main（String [] args）{
StudentInfo student = new StudentInfo（）;
student.setName（Rishit）;
student.setRollNo（47）;
SessionFactory sf = new Configuration（）。configure（）。buildSessionFactory（）;
会话会话= sf.openSession（）;
session.beginTransaction（）;
session.save（student）;
session.getTransaction（）。commit（）;
session.close（）;
sf.close（）;
这里是我的hibernate.config。 xml文件
> <？xml version ='1.0'encoding ='utf-8'？> <！ - 〜Hibernate，关系
>习惯Java的持久性~~许可证：GNU Lesser General
>公共许可证（LGPL），版本2.1或更高版本。 〜查看lgpl.txt文件
>在根目录或< http：//www.gnu.org/licenses/lgpl-2.1.html> ;.
> - > <！DOCTYPE hibernate-configuration PUBLIC
> - // Hibernate / Hibernate Configuration DTD 3.0 // EN
> http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd\">
>
>冬眠-结构>
>
> <会话工厂>
>
> <！ - 数据库连接设置 - >
> <！ - < property name =connection.driver_class> org.hsqldb.jdbcDriver< / property>
> < property name =connection.url> jdbc：hsqldb：hsql：// localhost / TestDB< / property>
> - >
>
> < property name =connection.driver_class> org.mysql.Driver< / property>
> < property name =connection.url> jdbc：mysql：// localhost：3306 / hibernatetutorials< / property>
> < property name =connection.username> root< / 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.MySQLDialect
> < /性>
>
> <！ - 启用Hibernate的自动会话上下文管理 - >
> < property name =current_session_context_class> thread< / property>
>
> < property name =cache.use_query_cache> true< / property>
> < property name =cache.use_second_level_cache> true< / property>
> < property name =cache.use_structured_entries> true< / property>
> < property name =cache.region.factory_class> org.hibernate.cache.EhCacheRegionFactory< / property>
> < property name =net.sf.ehcache.configurationResourceName> /hibernate-config/ehcache.xml< / property>
>
> <！ - 禁用第二级缓存 - >
> < property name =cache.provider_class> org.hibernate.cache.NoCacheProvider< / property>
>
> <！ - 将所有执行的SQL回复到stdout - >
> < property name =show_sql> true< / property>
>
> <！ - 删除所有现有的表格并创建新的表格 - >
> < property name =hbm2ddl.auto>建立< / property>
>
> < mapping class =com.digitek.students.StudentInfo/>
>
> < /会话工厂>
>
> < /休眠-结构>
错误讯息
2015年11月2日上午11点02分26秒org.hibernate.Version logVersion
信息：HHH000412：Hibernate Core {5.0.2.Final}
Nov 02，2015 11:02 ：26 AM org.hibernate.cfg.Environment< clinit>
信息：HHH000206：找不到hibernate.properties
2015年11月02日11:02:26 org.hibernate.cfg.Environment buildBytecodeProvider
INFO：HHH000021：字节码提供程序名称：javassist
Nov 02，2015 11:02:26 AM org.hibernate.boot.jaxb.internal.stax.LocalXmlResourceResolver resolveEntity
WARN：HHH90000012：识别过时的hibernate命名空间http://hibernate.sourceforge.net/hibernate-组态。改用名称空间http://www.hibernate.org/dtd/hibernate-configuration。随时可以删除对过时的DTD / XSD名称空间的支持。
线程main中的异常org.hibernate.HibernateException：在org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal（JaxbCfgProcessor.java:107）
处访问stax流
时出错org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal（JaxbCfgProcessor.java:65）
at org.hibernate.boot.cfgxml.internal.ConfigLoader.loadConfigXmlResource（ConfigLoader.java:57）
at org.hibernate.boot.registry.StandardServiceRegistryBuilder.configure（StandardServiceRegistryBuilder.java:163）
在org.hibernate.cfg.Configuration.configure（Configuration.java:259）
在org.hibernate.cfg。 Configuration.configure（Configuration.java:245）
at com.digitek.students.Main.main（Main.java:15）
引起：javax.xml.stream.XMLStreamException：ParseError at [row ，col]：[12,1]
消息：prolog中不允许使用内容。
at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next（Unknown Source）
at com.sun.xml.internal.stream.XMLEventReaderImpl.peek（Unknown Source）
at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal（JaxbCfgProcessor.java:103）
... 6 more
请帮我解决这个问题。
解决方案问题在于XML被评论的方式。
<！ - 数据库连接设置 - >
试试这个
<！ -
<数据库连接设置>
- > b
$ b comment-a-single-line-in-xml>如何评论XML中的单行？
I am trying to create a table on my database using hibernate. Here is my code
The java object
package com.digitek.students;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name="studentInfo")
public class StudentInfo {
@Id
private int rollNo;
public int getRollNo() {
return rollNo;
}
public void setRollNo(int rollNo) {
this.rollNo = rollNo;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
private String name;
}
The data access object
package com.digitek.students;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class Main {
public static void main(String[] args){
StudentInfo student = new StudentInfo();
student.setName("Rishit");
student.setRollNo(47);
SessionFactory sf = new Configuration().configure().buildSessionFactory();
Session session = sf.openSession();
session.beginTransaction();
session.save(student);
session.getTransaction().commit();
session.close();
sf.close();
}
}
Here is my hibernate.config.xml file
> <?xml version='1.0' encoding='utf-8'?> <!-- ~ Hibernate, Relational
> Persistence for Idiomatic Java ~ ~ License: GNU Lesser General
> Public License (LGPL), version 2.1 or later. ~ See the lgpl.txt file
> in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
> --> <!DOCTYPE hibernate-configuration PUBLIC
> "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
> "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
>
> hibernate-configuration>
>
> <session-factory>
>
> <!-- Database connection settings -->
> <!-- <property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
> <property name="connection.url">jdbc:hsqldb:hsql://localhost/TestDB</property>
> -->
>
> <property name="connection.driver_class">org.mysql.Driver</property>
> <property name="connection.url">jdbc:mysql://localhost:3306/hibernatetutorials</property>
> <property name="connection.username">root</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.MySQLDialect
> </property>
>
> <!-- Enable Hibernate's automatic session context management -->
> <property name="current_session_context_class">thread</property>
>
> <property name="cache.use_query_cache">true</property>
> <property name="cache.use_second_level_cache">true</property>
> <property name="cache.use_structured_entries">true</property>
> <property name="cache.region.factory_class">org.hibernate.cache.EhCacheRegionFactory</property>
> <property name="net.sf.ehcache.configurationResourceName">/hibernate-config/ehcache.xml</property>
>
> <!-- Disable the second-level cache -->
> <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
>
> <!-- Echo all executed SQL to stdout -->
> <property name="show_sql">true</property>
>
> <!-- Drop all existing tables and create new ones -->
> <property name="hbm2ddl.auto">create</property>
>
> <mapping class="com.digitek.students.StudentInfo"/>
>
> </session-factory>
>
> </hibernate-configuration>
The error message
Nov 02, 2015 11:02:26 AM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.0.2.Final}
Nov 02, 2015 11:02:26 AM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Nov 02, 2015 11:02:26 AM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Nov 02, 2015 11:02:26 AM org.hibernate.boot.jaxb.internal.stax.LocalXmlResourceResolver resolveEntity
WARN: HHH90000012: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/hibernate-configuration. Use namespace http://www.hibernate.org/dtd/hibernate-configuration instead. Support for obsolete DTD/XSD namespaces may be removed at any time.
Exception in thread "main" org.hibernate.HibernateException: Error accessing stax stream
at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:107)
at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:65)
at org.hibernate.boot.cfgxml.internal.ConfigLoader.loadConfigXmlResource(ConfigLoader.java:57)
at org.hibernate.boot.registry.StandardServiceRegistryBuilder.configure(StandardServiceRegistryBuilder.java:163)
at org.hibernate.cfg.Configuration.configure(Configuration.java:259)
at org.hibernate.cfg.Configuration.configure(Configuration.java:245)
at com.digitek.students.Main.main(Main.java:15)
Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[12,1]
Message: Content is not allowed in prolog.
at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(Unknown Source)
at com.sun.xml.internal.stream.XMLEventReaderImpl.peek(Unknown Source)
at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:103)
... 6 more
Please help me sort this. Thank you in advance.
解决方案 The problem is with the way XML is commented.
<!-- Database connection settings -->
Try this
<!--
<Database connection settings>
-->
How to comment a single line in XML?
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