springboot 配置双mysql数据库

项目中用到，学习了一下，记录下来，先回用，再搞懂原理

架构

springboot+mybatis+mysql连接池（springboot默认的HikariCP）

 配置点

1.就目录里的DataSourceConfigBackup和DataSourceConfigMaster，以第一个举例

package com.faith.twodatabase.configuration;

import com.zaxxer.hikari.HikariDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
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 org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import javax.sql.DataSource;

@Configuration
@MapperScan(basePackages = {"com.faith.tw