使用H2数据库将Spring连接到休眠时获取异常

Question

我得到以下异常：

log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mysessionFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.InvalidMappingException: Could not parse mapping document from input stream
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1420)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:563)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
    at com.naveen.java.InsertTest.main(InsertTest.java:12)
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from input stream
    at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:508)
    at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:677)
    at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1477)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1417)
    ... 12 more
Caused by: org.dom4j.DocumentException: Connection timed out: connect Nested exception: Connection timed out: connect
    at org.dom4j.io.SAXReader.read(SAXReader.java:484)
    at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:499)
    ... 16 more

下面是员工.java

package com.naveen.java;

import javax.persistence.Id;

public class Employee {

private int id;
private String name;
private int salary;
private String LASTNAME ;

public String getLASTNAME() {
    return LASTNAME;
}
public void setLASTNAME(String lASTNAME) {
    this.LASTNAME = lASTNAME;
}
public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public float getSalary() {
    return salary;
}
public void setSalary(int salary) {
    this.salary = salary;
}

}

下面是employeedao.java

package com.naveen.java;
import org.springframework.orm.hibernate3.HibernateTemplate;

public class EmployeeDao {
HibernateTemplate template;
public void setTemplate(HibernateTemplate template) {
    this.template = template;
}

public void saveEmployee(Employee e){
    template.save(e);
}

public void updateEmployee(Employee e){
    template.update(e);
}

public void deleteEmployee(Employee e){
    template.delete(e);
}
}

下面是inserttest.java

package com.naveen.java;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

public class InsertTest {
public static void main(String[] args) {

    ApplicationContext con=new ClassPathXmlApplicationContext("applicationContext.xml");
    //Resource r=new ClassPathResource("applicationContext.xml");
    EmployeeDao dao=(EmployeeDao)con.getBean("d");

    Employee e=new Employee();
    e.setId(147);
    e.setName("kumar");
    e.setSalary(70000);

    //dao.saveEmployee(e);
    dao.updateEmployee(e);
}
}

下面都是xml

<?xml version="1.0" encoding="UTF-8"?>  
<beans  
    xmlns="http://www.springframework.org/schema/beans"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xmlns:p="http://www.springframework.org/schema/p"  
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">  


   <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
          destroy-method="close">
        <property name="driverClassName" value="org.h2.Driver"/>
        <property name="url" value="jdbc:h2:~/test"/>
        <property name="username" value="sa"/>
        <property name="password" value="123"/>
    </bean> 


<bean id="mysessionFactory"  class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">  
        <property name="dataSource" ref="dataSource"></property>  

        <property name="mappingResources">  
         <list>
        <value>employee-hbm.xml</value>  
         </list>
        </property>  

       <property name="hibernateProperties">  
            <props>  
                <prop key="hibernate.dialect">org.hibernate.dialect.H2Dialect</prop>  
                <prop key="hibernate.show_sql">true</prop>  

            </props>  
        </property>  
    </bean>  

    <bean id="template" class="org.springframework.orm.hibernate3.HibernateTemplate">  
    <property name="sessionFactory" ref="mysessionFactory"></property>  
    </bean>  

    <bean id="d" class="com.naveen.EmployeeDao">  
    <property name="template" ref="template"></property>  
    </bean>  </beans>

第二个xml映射

<?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.naveen.java.Employee" table="EMP558">

      <id name="id" type="int" column="id">
         <generator class="native"/>
      </id>
      <property name="firstName" column="NAME" type="string"/>
      <property name="lastName" column="LASTNAME" type="string"/>
      <property name="salary" column="salary" type="double"/>
   </class>
</hibernate-mapping>

我试图通过JDBC进行链接，并且工作正常。

Answer 1

薪水字段具有int类型，但是在休眠映射中有双精度型

Answer 2

这可能是由于休眠状态尝试检索dtd文件而引起的。 因此，解决方法可能是：

1. 将dtd的值从该值更改为"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"

2. 创建自己的函数以解析配置，然后像这样传递给休眠状态

    public static Document parseConfiguration(String resourcePath) throws Exception { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); factory.setValidating(false); <-- the magic is here DocumentBuilder builder = factory.newDocumentBuilder(); return builder.parse(builder.getClass().getResourceAsStream(resourcePath)); } 

Answer 3

尽管我已修复了实体中的许多错误（实体中不存在映射文件中定义的属性），但我没有遇到错误。 我已经到达尝试插入记录的步骤，所以我已经远远超过了收到错误的阶段。

通过查看会引发错误的休眠源文件（ org.hibernate.cfg.Configuration.addInputStream(Configuration.java:499) ），休眠状态无法访问您的映射xml文件。

请仔细检查映射文件是否在正确的位置并且可读。 还要确保您在类路径中具有正确的休眠jar版本。