springboot+jpa+mybatis 多数据源支持

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import javax.sql.DataSource;

/**
 * com.ehaoyao.paycenter.job.common.config
 * 数据源配置类
 * @author PF
 * @create 2018-05-10 16:17
 **/
@Configuration
public class DataSourceConfig {
    @Bean(name = "payCenterDataSource")
    @Qualifier("payCenterDataSource")
    @Primary
    @ConfigurationProperties(prefix="spring.datasource.paycenter")
    public DataSource paycenterDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "erpDataSource")
    @Qualifier("erpDataSource")
    @ConfigurationProperties(prefix="spring.datasource.erp")
    public DataSource erpDataSource() {
        return DataSourceBuilder.create().build();
    }
}

1、配置dataSource，代码如上所述。

package com.ehaoyao.paycenter.job.common.config;/**
 * 支付中心数据源配置类
 *
 * @author PF
 * Created by dell on 2018-05-04.
 */

import com.alibaba.druid.pool.DruidDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.sql.DataSource;

/**
 * com.ehaoyao.paycenter.job.common.config
 * 支付中心数据源配置类
 *
 * @author PF
 * @create 2018-05-04 10:26
 **/
@Configuration
@MapperScan(basePackages = "com.ehaoyao.paycenter.persistence.pay.mapper.paycenter", sqlSessionFactoryRef = "payCenterSqlSessionFactory")
@EnableTransactionManagement
public class PayCenterDataSourceConfig {

    static final String MAPPER_LOCATION = "classpath:mappings/com/ehaoyao/paycenter/persistence/pay/mapper/paycenter/*.xml";

    @Autowired
    @Qualifier("payCenterDataSource")
    private DataSource payCenterDataSource;

    @Bean(name = "payCenterTransactionManager")
    @Primary
    public DataSourceTransactionManager masterTransactionManager() {
        return new DataSourceTransactionManager(payCenterDataSource);
    }

    @Bean(name = "payCenterSqlSessionFactory")
    @Primary
    public SqlSessionFactory payCenterSqlSessionFactory(@Qualifier("payCenterDataSource") DataSource payCenterDataSource)
            throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(payCenterDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(PayCenterDataSourceConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }
}

2、master数据源的sessionFactory、transactionManager等配置，代码如上。

package com.ehaoyao.paycenter.job.common.config;/**
 * ERP数据源配置类
 *
 * @author PF
 * Created by dell on 2018-05-04.
 */

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
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.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.persistence.EntityManager;
import javax.sql.DataSource;
import java.util.Map;

/**
 * com.ehaoyao.paycenter.job.common.config
 * ERP数据源配置类
 * @author PF
 * @create 2018-05-04 10:27
 **/
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef="erpEntityManagerFactory",
        transactionManagerRef="erpTransactionManager",
        basePackages= { "com.ehaoyao.paycenter.persistence.pay.Repository" })
public class ErpDataSourceConfig {

    @Autowired
    @Qualifier("erpDataSource")
    private DataSource erpDataSource;

    @Bean(name = "entityManager")
    public EntityManager entityManager(EntityManagerFactoryBuilder builder) {
        return erpEntityManagerFactory(builder).getObject().createEntityManager();
    }

    @Bean(name = "erpEntityManagerFactory")
    public LocalContainerEntityManagerFactoryBean erpEntityManagerFactory (EntityManagerFactoryBuilder builder) {
        return builder
                .dataSource(erpDataSource)
                .properties(getVendorProperties(erpDataSource))
                .packages("com.ehaoyao.paycenter.persistence.pay.entity.erp")
                .persistenceUnit("erpPersistenceUnit")
                .build();
    }

    @Autowired
    private JpaProperties jpaProperties;

    private Map getVendorProperties(DataSource dataSource) {
        return jpaProperties.getHibernateProperties(dataSource);
    }

    @Bean(name = "erpTransactionManager")
    public PlatformTransactionManager transactionManagerPrimary(EntityManagerFactoryBuilder builder) {
        return new JpaTransactionManager(erpEntityManagerFactory(builder).getObject());
    }

}

3、配置slave数据源的sessionFactory、transactionManager等配置，代码如上。

自己留着备查用的，master数据源用的mybatis，slave用的jpa（虽然用法很搞，但是主要为了记录多数据源，及springboot下jpa配置相关）

原文地址：https://www.cnblogs.com/falcon-fei/p/9021121.html