我们可以在单个 Z2A2D595E6ED93A0B24D4333B7 项目中同时使用 jdbc 和 spring 数据 jpa 吗？ 无 spring 启动

Question

嗨，我有一个客户要求，其中遗留代码是用 JDBC 编写的，现在他们想转移到 ORM 但他们希望他们的旧 dao（遗留代码）也存在，所以我尝试制作一个我配置了两种配置的项目但我总是以错误告终。 谁能告诉我方法，或者甚至可以同时使用两者吗？ 我附上了下面的代码：

这是配置文件

@Configuration
@EnableJpaRepositories(basePackages = {"net.codejava.spring.repository"})
public class AppConfig {
    @Bean
    public LocalEntityManagerFactoryBean entityManagerFactory() {
        LocalEntityManagerFactoryBean factoryBean = new LocalEntityManagerFactoryBean();
        factoryBean.setPersistenceUnitName("TestDB");
        
        return factoryBean;
    }
    
    @Bean
    public JpaTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(entityManagerFactory);
        
        return transactionManager;
    }

}

这是持久性。xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
          http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
    version="2.1">
    
    <persistence-unit name="TestDB">
        <properties>
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/contactdb" />
            <property name="javax.persistence.jdbc.user" value="root" />
            <property name="javax.persistence.jdbc.password" value="password" />
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.format_sql" value="true" />
        </properties>
    </persistence-unit>
    
</persistence>

这是 MVC 配置文件

@Configuration
@ComponentScan(basePackages="net.codejava.spring")
@EnableWebMvc
public class MvcConfiguration extends WebMvcConfigurerAdapter{

    @Bean
    public ViewResolver getViewResolver(){
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        return resolver;
    }
    
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
    }

    @Bean
    public DataSource getDataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/contactdb");
        dataSource.setUsername("root");
        dataSource.setPassword("password");
        
        return dataSource;
    }
    
    @Bean
    public ContactDAO getContactDAO() {
        return new ContactDAOImpl(getDataSource());
    }
}

附在应用程序的文件夹结构下方