我正在使用带有hibernate新手的Spring，我按照一步一步的教程http://gerrydevstory.com/2013/06/29/spring-mvc-hibernate-mysql-quick-start-from-scratch/进行操作并且正常但我已经更改了代码并给了我这个错误。我搜索了stackoverflow，但同样的错误，我不明白为什么我的失败？非常感谢你。抱歉我的英语，但我正在学习。
Empresas.java
package com.prueba.emp;
// imports ..
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "empresas")
public class Empresas {
@Id @GeneratedValue private long CLAVE;
private String NOMBRE;
/* getters & setters */
public long getCLAVE() {
return CLAVE;
}
public void setCLAVE(long CLAVE) {
this.CLAVE = CLAVE;
}
public String getNOMBRE() {
return NOMBRE;
}
public void setNOMBRE(String NOMBRE) {
this.NOMBRE = NOMBRE;
}
}
EmpresasController.java
package com.prueba.emp;
//imports..
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
@RequestMapping("/")
public class EmpresasController {
// @Autowired private EmpresasDAO empresasDAO;
@Autowired private EmpresasService empresasService;
/**
* This handler method is invoked when
* http://localhost:8080/pizzashop is requested.
* The method returns view name "index"
* which will be resolved into /WEB-INF/index.jsp.
* See src/main/webapp/WEB-INF/servlet-context.xml
*/
@RequestMapping(method = RequestMethod.GET)
public String list(Model model) {
List<Empresas> empresas = empresasService.findAll();
model.addAttribute("empresas", empresas);
return "index";
}
}
EmpresasDAOImpl.java
package com.prueba.emp;
//imports..
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
@Repository
@SuppressWarnings({"unchecked", "rawtypes"})
public class EmpresasDAOImpl implements EmpresasDAO {
@Autowired private SessionFactory sessionFactory;
/**
* @Transactional annotation below will trigger Spring Hibernate transaction manager to automatically create
* a hibernate session. See src/main/webapp/WEB-INF/servlet-context.xml
*/
@Transactional
public List<Empresas> findAll() {
Session session = sessionFactory.getCurrentSession();
List empresas = session.createQuery("from Empresas").list();
return empresas;
}
}
EmpresasServiceImpl.java
package com.prueba.emp;
//imports..
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
@Service
public class EmpresasServiceImpl implements EmpresasService {
@Autowired
private EmpresasDAO empresasDAO;
/**
* @Transactional annotation below will trigger Spring Hibernate transaction manager to automatically create
* a hibernate session. See src/main/webapp/WEB-INF/servlet-context.xml
*/
@Transactional
public List<Empresas> findAll() {
return empresasDAO.findAll();
}
}
Web.xml中
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>empresaServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>empresaServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
servlet的context.xml中
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd">
<!-- Enable @Controller annotation support -->
<mvc:annotation-driven />
<!-- Map simple view name such as "test" into /WEB-INF/test.jsp -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/" />
<property name="suffix" value=".jsp" />
</bean>
<!-- Scan classpath for annotations (eg: @Service, @Repository etc) -->
<context:component-scan base-package="com.prueba.emp"/>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
p:location="/WEB-INF/jdbc.properties" />
<!-- JDBC Data Source. It is assumed you have MySQL running on localhost port 3306 with
username root and blank password. Change below if it's not the case -->
<bean id="myDataSource"
class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"
p:driverClassName="${jdbc.driverClassName}"
p:url="${jdbc.databaseurl}"
p:username="${jdbc.username}"
p:password="${jdbc.password}"
p:validationQuery="${jdbc.validationQuery}" />
<!--
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/pizzashop"/>
<property name="username" value="root"/>
<property name="password" value=""/>
<property name="validationQuery" value="SELECT 1"/>
</bean> -->
<!-- Hibernate Session Factory -->
<bean id="mySessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="myDataSource"/>
<property name="packagesToScan">
<array>
<value>com.prueba.emp</value>
</array>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${jdbc.dialect}</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<!-- Hibernate Transaction Manager -->
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="mySessionFactory"/>
</bean>
<!-- Activates annotation based transaction management -->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
jdbc.properties
jdbc.driverClassName= com.mysql.jdbc.Driver
jdbc.dialect=org.hibernate.dialect.MySQLDialect
jdbc.databaseurl=jdbc\:mysql\://localhost\:3306/empresaschema
jdbc.username=root
jdbc.password=1234
jdbc.validationQuery=SELECT 1