Springboot：休眠配置

Question

我添加了application.properties文件，如下所示：

Spring DATASOURCE（DataSourceAutoConfiguration＆DataSourceProperties）spring.datasource.url = jdbc：mysql：// localhost：3306 / test？useSSL = false spring.datasource.username = root spring.datasource.password = root

Hibernate属性SQL方言使Hibernate为所选数据库生成更好的SQL spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5InnoDBDialect

Hibernate DDL自动（创建，创建，删除，验证，更新）spring.jpa.hibernate.ddl-auto =创建

spring.jpa.properties.hibernate.current_session_context_class = org.springframework.orm.hibernate4.SpringSessionContext

对于dao层，类：

package com.repository;

import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Repository;

@Repository
public class DaoClass
{
    @Autowired
    private SessionFactory sessionFactory;

    public SessionFactory getSessionFactory()
    {
        return sessionFactory;
    }

    @Bean
    public void setSessionFactory(SessionFactory sessionFactory)
    {
        this.sessionFactory = sessionFactory;
    }
}

现在在运行springboot应用程序时，我面临以下错误：

***************************申请无法开始

---

描述：

com.repository.DaoClass中的字段sessionFactory需要找不到类型为'org.hibernate.SessionFactory'的bean。

行动：

考虑在配置中定义类型为“ org.hibernate.SessionFactory”的bean。

POM.xml

 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>springboot</groupId> <artifactId>firstprogram</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.2.RELEASE</version> </parent> <name>firstprogram Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>5.3.6.Final</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> </dependencies> <build> <finalName>firstprogram</finalName> </build> </project> 

我也加了

package com.repository;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import org.springframework.stereotype.Component;

@Component
public class DaoClass
{
    @PersistenceContext
    private EntityManager entityManger;

    public EntityManager getEntityManger()
    {
        return entityManger;
    }

    public void setEntityManger(EntityManager entityManger)
    {
        this.entityManger = entityManger;
    }
}

Answer 1

Spring Boot不会自动配置SessionFactory ，而是配置EntityManagerFactory ，您可以直接使用它，也可以通过以下方式从中获取SessionFactory ：

SessionFactory sessionFactory = entityManagerFactory.unwrap(SessionFactory.class);