Spring-Hibernate集成框架

Question

我正在嘗試將spring和hibernate集成在一起。我想使用此功能將數據保存到數據庫中。 我的文件如下。

Employee.java

package springhibernate;

public class Employee {

    private int id;
    private String name;
    private float salary;

    public Employee() {
        super();
    }
    public Employee(int id, String name, float salary) {
        super();
        this.id = id;
        this.name = name;
        this.salary = salary;
    }
    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(float salary) {
        this.salary = salary;
    }


}

employee.hbm.xml

<?xml version='1.0' encoding='UTF-8'?>  
<!DOCTYPE hibernate-mapping PUBLIC  
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"  
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">  

<hibernate-mapping>  
<class name="com.javatpoint.Employee" table="emp558">  
          <id name="id">  
          <generator class="assigned"></generator>  
          </id>  

          <property name="name"></property>  
          <property name="salary"></property>  
</class>  
</hibernate-mapping> 

EmployeeDao.java

package springhibernate;

import java.util.ArrayList;
import java.util.List;

import org.springframework.orm.hibernate3.HibernateTemplate;

public class EmployeeDao {

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

     //method to save employees
     public void saveEmployee(Employee e)
     {
         template.save(e);
     }

     //method to update employees

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

     //method to delete employees

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

     //method to return employee of given id

     public Employee getById(int id)
     {
         Employee e = (Employee)template.get(Employee.class, id);
         return e;
     }

     //method to return all employees

     public List<Employee> getEmployees()
     {
         List<Employee> list = new ArrayList<Employee>();
         list = template.loadAll(Employee.class);
         return list;
     }
}

applicationContext.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">  
        <property name="driverClassName"  value="oracle.jdbc.driver.OracleDriver"/>  
        <property name="url" value="jdbc:oracle:thin:@localhost:1521/XE"></property>  
        <property name="username" value="system"></property>  
        <property name="password" value="manager"></property>  
    </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.Oracle9Dialect</prop>  
                <prop key="hibernate.hbm2ddl.auto">update</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="springhibernate.EmployeeDao">  
    <property name="template" ref="template"></property>  
    </bean>  


    </beans>  

InsertTest.java

 package springhibernate;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

@SuppressWarnings("deprecation")
public class InsertTest {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Resource r = new ClassPathResource("applicationContext.xml");
        BeanFactory factory = new XmlBeanFactory(r);
         EmployeeDao dao = (EmployeeDao)factory.getBean("d");

         Employee e = new Employee();
         e.setId(114);
         e.setName("varun");
         e.setSalary(5000);

         dao.saveEmployee(e);
    }

}

現在，在運行上面的代碼時，我得到了如下異常。 我包括/添加了所有需要的jar文件。 我還在stackoverflow上看到了一些相關的問題，但沒有得到正確的提示。

錯誤

Oct 23, 2017 3:12:45 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'd' defined in class path resource [applicationContext.xml]: Cannot resolve reference to bean 'template' while setting bean property 'template'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'template' defined in class path resource [applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/hibernate/JDBCException
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:359)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1469)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at springhibernate.InsertTest.main(InsertTest.java:15)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'template' defined in class path resource [applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/hibernate/JDBCException
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1093)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1038)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:351)
    ... 10 more
Caused by: java.lang.NoClassDefFoundError: org/hibernate/JDBCException
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.getDeclaredConstructor(Unknown Source)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:80)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1086)
    ... 18 more
Caused by: java.lang.ClassNotFoundException: org.hibernate.JDBCException
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 24 more**

誰能幫助我擺脫這種錯誤/異常。

提前致謝。

Answer 1

我不確定此解決方案是否會適得其反。 更換：

Resource r = new ClassPathResource("applicationContext.xml");
BeanFactory factory = new XmlBeanFactory(r);
EmployeeDao dao = (EmployeeDao)factory.getBean("d");

與：

ApplicationContext r = new ClassPathXMLContext("applicationContext.xml);
Employee dao = r.getBean("d");