找不到必需的键“ hibernate.dialect”

Question

我正在尝试使用java配置开发spring MVC crud应用程序。我在本地tomcat服务器上运行该应用程序。该应用程序在xml配置中运行良好。当我修改为以Java配置运行时，出现以下异常。

java.lang.IllegalStateException: Required key 'hibernate.dialect' not found

DemoConfig.java

@Configuration
@EnableWebMvc
@EnableTransactionManagement
@ComponentScan(basePackages="com.webapplication.neuro")
@PropertySource("classpath:persistence-mysql.properties")
public class DemoAppConfig {    
@Autowired
private Environment env;    

    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(securityDataSource());
        sessionFactory.setPackagesToScan(new String[] { "com.websystique.spring.model" });
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
     }

@Bean
public ViewResolver viewResolver() {
    InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();     
    viewResolver.setPrefix("/WEB-INF/view/");
    viewResolver.setSuffix(".jsp");     
    return viewResolver;        
}

@Bean
public DataSource securityDataSource() {
    ComboPooledDataSource securityDataSource = new ComboPooledDataSource();     
    try {
        securityDataSource.setDriverClass(env.getProperty("jdbc.driver"));
    } catch (PropertyVetoException e) {
        throw new RuntimeException(e);
    }
    securityDataSource.setJdbcUrl(env.getProperty("jdbc.url"));
    securityDataSource.setUser(env.getProperty("jdbc.user"));
    securityDataSource.setPassword(env.getProperty("jdbc.password"));

    securityDataSource.setInitialPoolSize(getIntProperty("connection.pool.initialPoolSize"));
    securityDataSource.setMinPoolSize(getIntProperty("connection.pool.minPoolSize"));
    securityDataSource.setMaxPoolSize(getIntProperty("connection.pool.maxPoolSize"));
    securityDataSource.setMaxIdleTime(getIntProperty("connection.pool.maxIdleTime"));

    return securityDataSource;
}

private int getIntProperty(String propName) {       
    String propVal = env.getProperty(propName);     
    int intPropVal = Integer.parseInt(propVal);     
    return intPropVal;              
}

private Properties hibernateProperties() {
    Properties properties = new Properties();
    properties.put("hibernate.dialect", env.getRequiredProperty("hibernate.dialect"));
    properties.put("hibernate.show_sql", env.getRequiredProperty("hibernate.show_sql"));
    properties.put("hibernate.format_sql", env.getRequiredProperty("hibernate.format_sql"));
    return properties;        
}

@Bean
@Autowired
public HibernateTransactionManager transactionManager(SessionFactory s) {
   HibernateTransactionManager txManager = new HibernateTransactionManager();
   txManager.setSessionFactory(s);
   return txManager;
}   
}

这些是我在pom.xml中添加的依赖项

<properties>
    <springframework.version>5.1.5.RELEASE</springframework.version>
    <springsecurity.version>5.1.4.RELEASE</springsecurity.version>
    <hibernate.version>5.4.1.Final</hibernate.version>

    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
</properties>

<dependencies>

    <!-- Spring MVC support -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>${springframework.version}</version>
    </dependency>

    <!-- Spring Security -->

    <!-- spring-security-web and spring-security-config -->
    <dependency>
         <groupId>org.springframework.security</groupId>
         <artifactId>spring-security-web</artifactId>
         <version>${springsecurity.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-config</artifactId>
        <version>${springsecurity.version}</version>
    </dependency>

    <!-- add spring security taglibs support -->
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-taglibs</artifactId>
        <version>${springsecurity.version}</version>
    </dependency>

    <!-- Servlet, JSP and JSTL support -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>javax.servlet.jsp-api</artifactId>
        <version>2.3.1</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>

    <!-- add mySQL and c3p0 support -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.45</version>
    </dependency>

    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.2</version>
    </dependency>

    <!-- Hibernate -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>${hibernate.version}</version>
    </dependency>


    <!-- to compensate for java 9+ not including jaxb -->
    <dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>2.3.0</version>
    </dependency>

</dependencies>

我已通过网站（http://websystique.com/spring/spring4-hibernate4-mysql-maven-integration-example-using-annotations/）进行Java配置。请帮助我解决此问题。预先感谢