springboot 整合hibernate

Posted 2020-12-15 BigNew

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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.ztsj</groupId>
  <artifactId>ztsj-demo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.16.RELEASE</version>
  </parent>
  
   <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.SR4</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
  </dependencyManagement>
  <dependencies>
      <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
 
      <!-- 加了该配置文件 会自动启动数据库 -->
      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-data-jpa</artifactId>
      </dependency>
      
          
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
  </dependencies>
  
</project>

application.xml

#mysql
spring.datasource.url=jdbc:mysql://localhost:3306/ztsj?useunicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5
# Specify the DBMS
spring.jpa.database = MYSQL
# Show or not log for each sql query
spring.jpa.show-sql = true
# Hibernate ddl auto (create, create-drop, update)
spring.jpa.hibernate.ddl-auto=update
spring.jpa.database=mysql
spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate5.SpringSessionContext
# stripped before adding them to the entity manager
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

 

配置类

package com.ims;

import java.util.Properties;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.orm.hibernate5.LocalSessionFactoryBean;

@Configuration
public class HibernateConfig {
     
    @Value("${spring.jpa.properties.hibernate.current_session_context_class}")
    public String current_session_context_class;
    @Autowired
    private DataSource dataSource;
    
    @Bean
    public LocalSessionFactoryBean sessionFactoryBean() {
       LocalSessionFactoryBean sessionFactoryBean = new LocalSessionFactoryBean();
       sessionFactoryBean.setDataSource(dataSource);
       sessionFactoryBean.setPackagesToScan("com.ims");//dao和entity的公共包
       Properties properties = new Properties();
       properties.setProperty("hibernate.current_session_context_class", current_session_context_class);
       sessionFactoryBean.setHibernateProperties(properties);
       return sessionFactoryBean;
    }
}

 

使用sessionFactory

@Autowired
    private EntityManagerFactory sessionFactory;
　　
    public Session getSession() {
   　　
　　　##使用此方式 service层 要使用事务管理
     return     sessionFactory.unwrap(SessionFactory.class).getCurrentSession();
　　　　

　　##使用此方式 service层 不要使用事务管理，但是要手动关闭session

　　　#return sessionFactory.unwrap(SessionFactory.class).openSession()
    }