Question

尝试创建一个简单的学生数据库，其中包含一个条目。我使用Hibernate 5.1.0和MySql作为数据库与简单的学生表，并且无法连接到数据库。使用Eclipse Mars和MYSQL jdbc驱动程序以及hibernate 5.1必需的jar添加到项目中。

我的StudentInfo.java文件

package com.nitish.hibernate;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="student")
public class StudentInfo {
    @Id
    private int rollno;
    private String name;
    private int marks;

    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;
    }
    public int getMarks() {
        return marks;
    }
    public void setMarks(int marks) {
        this.marks = marks;
    }


}

我的Main.java文件

package com.nitish.hibernate;

import org.hibernate.*; 

public class Main {

    public static void main(String args[]){

        StudentInfo s1 = new StudentInfo();

        s1.setName("Nitishpisal");
        s1.setRollno(5);
        s1.setMarks(33);


        try{
            Configuration conf = new Configuration();
            System.out.println("Hibernate Configuration loaded"); 
            conf.configure("hibernate.cfg.xml");

            ServiceRegistry sr = new StandardServiceRegistryBuilder().applySettings(conf.getProperties()).build();
            System.out.println("registry loaded"); 

            SessionFactory sf = conf.buildSessionFactory(sr);
            System.out.println(" session factory loaded");

            Session session = sf.openSession();

            session.beginTransaction();
            session.save(s1);
            session.getTransaction().commit();
            }catch(HibernateException e){
                e.printStackTrace();
            }   

    }
}

我的hibernate.cfg.xml文件

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

<hibernate-configuration xmlns="http://www.hibernate.org/xsd/hibernate-configuration">


    <session-factory>


        <!--  Database connection settings -->  -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property 
name="connection.url">jdbc:mysql://localhost:3306/test</property>
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>
        <property name="connection.pool_size">1</property>
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="show_sql">true</property>
        <property name="hbm2ddl.auto">create</property>

        <!-- model classes  and mapping info-->
        <mapping class="com.nitish.hibernate.StudentInfo"></property>

    </session-factory>

</hibernate-configuration>

我得到的错误

May 23, 2016 2:16:51 PM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
May 23, 2016 2:16:51 PM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Hibernate Configuration loaded
May 23, 2016 2:16:51 PM 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.
org.hibernate.internal.util.config.ConfigurationException: Unable to perform unmarshalling at line number 5 and column 87 in RESOURCE hibernate.cfg.xml. Message: cvc-elt.1: Cannot find the declaration of element 'hibernate-configuration'.
    at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:133)
    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 com.nitish.hibernate.Main.main(Main.java:27)
Caused by: javax.xml.bind.UnmarshalException
 - with linked exception:
[org.xml.sax.SAXParseException; lineNumber: 5; columnNumber: 87; cvc-elt.1: Cannot find the declaration of element 'hibernate-configuration'.]
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.handleStreamException(UnmarshallerImpl.java:468)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:448)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:420)
    at org.hibernate.boot.cfgxml.internal.JaxbCfgProcessor.unmarshal(JaxbCfgProcessor.java:126)
    ... 5 more
Caused by: org.xml.sax.SAXParseException; lineNumber: 5; columnNumber: 87; cvc-elt.1: Cannot find the declaration of element 'hibernate-configuration'.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:437)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:368)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:325)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1906)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:746)
    at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl.startElement(ValidatorHandlerImpl.java:570)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.ValidatingUnmarshaller.startElement(ValidatingUnmarshaller.java:86)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.InterningXmlVisitor.startElement(InterningXmlVisitor.java:60)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXEventConnector.handleStartElement(StAXEventConnector.java:246)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXEventConnector.bridge(StAXEventConnector.java:115)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:445)
    ... 7 more

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Answer 1

尝试删除此字符串： public class MaintanceTools { public static final ScheduledThreadPoolExecutor THREADSUPERVISER; private static final int ALLOWEDIDLESECONDS = 1*20; static { THREADSUPERVISER = new ScheduledThreadPoolExecutor(10); } public static void launchThreadsSupervising() { THREADSUPERVISER.scheduleWithFixedDelay(() -> { System.out.println("maintance launched " + Instant.now()); ACTIVECONNECTIONS.forEach((connection) -> { try { if ( !connection.isDataConnected() && (connection.getLastActionInstant() .until(Instant.now(), SECONDS) > ALLOWEDIDLESECONDS)) { connection.closeFTPConnection(); ACTIVECONNECTIONS.remove(connection); } } catch (Throwable e) { } }); System.out.println("maintance finished " + Instant.now()); }, 0, 20, TimeUnit.SECONDS); } }

Answer 2

在hibernate.cfg.xml中声明映射类后删除关闭属性标记替换

<!-- model classes  and mapping info-->
<mapping class="com.nitish.hibernate.StudentInfo"></property>

与

<!-- model classes  and mapping info-->
 <mapping class="com.nitish.hibernate.StudentInfo">

Hibernate 5.1.0错误无法执行解组，无法找到元素声明＆＃39; hibernate-configuration＆＃39;

2 个答案: