SpringBoot多数据源配置

项目参考

http://blog.didispace.com/springbootmultidatasource/

项目结构

project

项目实例地址

https://github.com/Inverseli/SpringBoot-Learning/tree/master/learning3-2-3

note

• 继承了Repository（JpaRepository,CrudRepository）的自定义接口，就相当于标注了@Repository注解，会自动加入Spring的IOC容器中。
• application.properties进行多数据源配置

spring.datasource.primary.jdbc-url=jdbc:mysql://localhost:3306/book_manager1
spring.datasource.primary.username=root
spring.datasource.primary.password=root
spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver

spring.datasource.secondary.jdbc-url=jdbc:mysql://localhost:3306/book_manager2
spring.datasource.secondary.username=root
spring.datasource.secondary.password=root
spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver
# hibernate settings
spring.jpa.properties.hibernate.hbm2ddl.auto=create-drop
spring.jpa.database=mysql
spring.jpa.generate-ddl=true
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.nameing.physical-strategy=org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy

• EntityManagers

package com.inverseli.learning;

import java.util.Map;
import javax.annotation.Resource;
import javax.persistence.EntityManager;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateSettings;
import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties;
import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**  
 * @date：2018年9月25日 上午11:37:47    
 * @author liyuhao
 * @version 1.0   
 * @since JDK 1.8  
 * @description：  
 */
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef = "entityManagerFactoryPrimary",
        transactionManagerRef = "transactionManagerPrimary",
        basePackages = {"com.inverseli.learning.domain.p"})
public class PrimaryConfig {
 
    @Resource
    @Qualifier("primaryDataSource")
    private DataSource primaryDataSource;
 
    @Primary
    @Bean(name = "entityManagerPrimary")
    public EntityManager entityManager(EntityManagerFactoryBuilder builder) {
        return entityManagerFactoryPrimary(builder).getObject().createEntityManager();
    }
 
    @Resource
    private JpaProperties jpaProperties;
    // 此处会因为版本的原因代码可能会不同
    private Map getVendorProperties() {
        // application.properties hibernate settings
        return jpaProperties.getHibernateProperties(new HibernateSettings()); 
    }
 
    /**
     * 设置实体类所在位置
     */
    @Primary //主次之分
    @Bean(name = "entityManagerFactoryPrimary")
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryPrimary(EntityManagerFactoryBuilder builder) {
        return builder
                .dataSource(primaryDataSource)
                .packages("com.inverseli.learning.domain.p")
                .persistenceUnit("primaryPersistenceUnit")
                .properties(getVendorProperties())
                .build();
    }
    
 
    @Primary 
    @Bean(name = "transactionManagerPrimary")
    public PlatformTransactionManager transactionManagerPrimary(EntityManagerFactoryBuilder builder) {
        return new JpaTransactionManager(entityManagerFactoryPrimary(builder).getObject());
    }
}