java - Spring MVC : No qualifying bean of type [org. hibernate.SessionFactory] ​​发现依赖项

Question

我收到一个很长的嵌套异常，最后一个是:

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.hibernate.SessionFactory] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at ...

这是我的 DAO

import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import ar.edu.itba.paw.FileUploadDao;
import ar.edu.itba.paw.models.UploadFile;

@Repository
public class FileUploadDAOImpl implements FileUploadDao {
    @Autowired
    private SessionFactory sessionFactory;

    public FileUploadDAOImpl() {
    }

    public FileUploadDAOImpl(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    @Transactional
    public void save(UploadFile uploadFile) {
        sessionFactory.getCurrentSession().save(uploadFile);
    }
}

这是我的 pom.xml，位于 DAO 所在的持久性文件夹中。

<?xml version="1.0"?>
<project
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
    xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>ar.edu.itba.paw</groupId>
        <artifactId>paw2018b</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <groupId>ar.edu.itba.paw</groupId>
    <artifactId>interfaces</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>interfaces</name>
    <url>http://maven.apache.org</url>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
        </dependency>
        <dependency>
          <groupId>org.hibernate</groupId>
          <artifactId>hibernate-core</artifactId>
         </dependency>
        <dependency>
            <groupId>ar.edu.itba.paw</groupId>
            <artifactId>models</artifactId>
            <version>${parent.version}</version>
        </dependency>

    </dependencies>
</project>

pom.xml 父亲包括:

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.3.6.Final</version>
        </dependency>

在 WebConfig.java 中我得到了这个:

    @Autowired
    @Bean(name = "fileUploadDao")
    public FileUploadDao getUserDao(SessionFactory sessionFactory) {
        return new FileUploadDAOImpl(sessionFactory);
    }

    @Bean(name = "multipartResolver")
    public CommonsMultipartResolver getCommonsMultipartResolver() {
        CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
        multipartResolver.setMaxUploadSize(20971520);   // 20MB
        multipartResolver.setMaxInMemorySize(1048576);  // 1MB
        return multipartResolver;
    }

我对spring/hibernate了解不深。我实际上在关注这个:https://www.codejava.net/coding/upload-files-to-database-with-spring-mvc-and-hibernate

我正在使用 postgresql。

我应该显示的任何其他代码请告诉我。

Answer 1

在pom中添加以下依赖，

(Assuming you're using mysql)
<dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <version><!--version--></version>
   <scope>runtime</scope>
</dependency>

一个合适的连接池，

<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-dbcp</artifactId>
    <version>7.0.55</version>
</dependency>

由于您使用的是 java 配置，请尝试将 SessionFactory 定义为 @Bean。

@Bean
public LocalSessionFactoryBean sessionFactory() {
   LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
   sessionFactory.setDataSource(restDataSource());
   sessionFactory.setPackagesToScan(
       new String[] { "base.package.to.scan" }
   );
   sessionFactory.setHibernateProperties(hibernateProperties());

   return sessionFactory;
}

@Bean
public DataSource restDataSource() {
    BasicDataSource dataSource = new BasicDataSource();
    dataSource.setDriverClassName("drivr");
    dataSource.setUrl("url"));
    dataSource.setUsername("uname");
    dataSource.setPassword("passwd");
    return dataSource;
}

Properties hibernateProperties() {
    return new Properties() {
        {
            setProperty("hibernate.hbm2ddl.auto", create);
            setProperty("hibernate.dialect", dielect_to_use);
        }
    };
}

您可能还需要事务管理器，

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

希望这有帮助。