Spring + Hibernate + postgres错误：不支持的major.minor版本52.0（无法加载类org.postgresql.Driver）

Question

我在Apache tomcat8 java-8 web应用程序上运行了一个示例 Spring 3.2 + Hibernate + Postgres 9.4。我收到了以下错误：

  

org.springframework.beans.factory.BeanCreationException：错误   创建名称为＆＃39; employeeDao＆＃39;：注入自动装配的bean   依赖失败;嵌套异常是    org.springframework.beans.factory.BeanCreationException ：无法   autowire字段：private org.hibernate.SessionFactory   com.forum.dao.EmployeeDaoImpl.sessionFactory;嵌套异常是   org.springframework.beans.factory.BeanCreationException：错误   创建名为＆＃39; sessionFactory＆＃39;的bean在ServletContext中定义   资源[/WEB-INF/spring-servlet.xml]：   无法解析引用   bean＆＃39; dataSource＆＃39;设置bean属性＆＃39; dataSource＆＃39 ;;嵌套   异常是org.springframework.beans.factory.BeanCreationException：   创建名称为＆＃39; dataSource＆＃39;的bean时出错在ServletContext中定义   resource [/WEB-INF/spring-servlet.xml]：设置属性值时出错;   嵌套异常是：   org.springframework.beans.PropertyBatchUpdateException;嵌套   PropertyAccessExceptions（1）是：PropertyAccessException 1：   org.springframework.beans.MethodInvocationException：Property   ＆＃39; driverClassName＆＃39;抛出异常;嵌套异常是    java.lang.UnsupportedClassVersionError：org / postgresql / Driver   不支持的major.minor版本52.0 （无法加载类   org.postgresql.Driver）

src / resources中的database.properties文件

database.driver=org.postgresql.Driver
database.url=jdbc:postgresql://localhost:5432/sample
database.user=postgres
database.password=sujata
hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
hibernate.show_sql=true
hibernate.hbm2ddl.auto=update

弹簧servlet.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:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-   3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

<context:property-placeholder   location="classpath:resources/database.properties" />


<context:component-scan base-package="com.forum" />
    <mvc:annotation-driven/>

<tx:annotation-driven transaction-   manager="hibernateTransactionManager"/>

<bean id="jspViewResolver"
      class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass"
        value="org.springframework.web.servlet.view.JstlView" />
    <property name="prefix" value="/WEB-INF/jsp/" />
    <property name="suffix" value=".jsp" />
</bean>


<bean id="dataSource"
      class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="${database.driver}" />
    <property name="url" value="${database.url}" />
    <property name="username" value="${database.user}" />
    <property name="password" value="${database.password}" />
</bean>

<bean id="sessionFactory"
      class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />

    <property name="annotatedClasses">
        <list>
            <value>com.forum.model.Employee</value>

        </list>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">${hibernate.dialect}  </prop>
            <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
            <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>             
        </props>
    </property>
</bean>

<bean id="hibernateTransactionManager"
      class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

我已经尝试了所有可用的答案 - 检查了我的JRE，JDK合规级别，postgres版本和相关的驱动程序，方言名称，正确的驱动程序。但问题仍然存在。该程序也完美适用于Mysql。我已将postgresql-9.4-1206-jdbc42.jar放在Web Content / WEB-INF / lib /文件夹中，而不是通过Add External Jars将它包含在构建路径中。以下定义有什么问题？