spring.datasource.monitor.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.monitor.url=jdbc:mysql://1.1.1.1:3306/monitor?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true
spring.datasource.monitor.username=aaa
spring.datasource.monitor.password=123
spring.datasource.monitor.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.monitor.initialSize=10 
spring.datasource.monitor.minIdle=10
spring.datasource.monitor.maxActive=200
spring.datasource.monitor.maxWait=6000
spring.datasource.monitor.timeBetweenEvictionRunsMills=6000
spring.datasource.monitor.minEvictableIdleTimeMillis=30000
spring.datasource.monitor.validationQuery=SELECT 'x'
spring.datasource.monitor.testWhileIdle=false
spring.datasource.monitor.testOnBorrow=true
spring.datasource.monitor.testOnReturn=false

spring.datasource.order.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.order.url=jdbc:mysql://1.1.1.1:3306/order?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true
spring.datasource.order.username=aaa
spring.datasource.order.password=123
spring.datasource.order.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.order.initialSize=10 
spring.datasource.order.minIdle=10
spring.datasource.order.maxActive=200
spring.datasource.order.maxWait=6000
spring.datasource.order.timeBetweenEvictionRunsMills=6000
spring.datasource.order.minEvictableIdleTimeMillis=30000
spring.datasource.order.validationQuery=SELECT 'x'
spring.datasource.order.testWhileIdle=false
spring.datasource.order.testOnBorrow=true
spring.datasource.order.testOnReturn=false

package com.xxx;

import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
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.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;

@Configuration
public class DataSourceOrderConfig {

    @Bean(name = "dataSource_order")
    @ConfigurationProperties(prefix = "spring.datasource.order")
    public DataSource testDataSource() {
        return DruidDataSourceBuilder.create().build();
    }

    @Bean(name = "sqlSessionFactory_order")
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("dataSource_order") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/**/*.xml"));
        return bean.getObject();
    }

    @Bean(name = "transactionManager_order")
    public DataSourceTransactionManager testTransactionManager(@Qualifier("dataSource_order") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

}

package com.xxx;

import org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import tk.mybatis.spring.mapper.MapperScannerConfigurer;
import java.util.Properties;

/**
 * 通用mapper配置类
 * 
 */
@Configuration
@AutoConfigureAfter(MybatisAutoConfiguration.class)
public class MapperScannerConfig {

    /**
     * Monitor的Mapper.
     * @return
     */
    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer() {
        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
        mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactory_monitor");
        mapperScannerConfigurer.setBasePackage("com.xxx.monitor.persistence");

        // 这里properties的相关配置
        Properties properties = new Properties();
        properties.setProperty("mappers",
                "tk.mybatis.mapper.common.Mapper,tk.mybatis.mapper.common.special.InsertListMapper");
        mapperScannerConfigurer.setProperties(properties);

        return mapperScannerConfigurer;
    }
    
    /**
     * 订单系统的Mapper.
     * @return
     */
    @Bean
    public MapperScannerConfigurer mapperScannerConfigurerOrder() {
        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
        mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactory_order");
        mapperScannerConfigurer.setBasePackage("com.xxx.order.persistence");

        // 这里properties的相关配置
        Properties properties = new Properties();
        properties.setProperty("mappers",
                "tk.mybatis.mapper.common.Mapper,tk.mybatis.mapper.common.special.InsertListMapper");
        mapperScannerConfigurer.setProperties(properties);

        return mapperScannerConfigurer;
    }
}

    SqlSessionFactoryBean bean= new SqlSessionFactoryBean();
    bean.setDataSource(dataSource);
    bean.setMapperLocations(resolveMapperLocations());
    return bean.getObject();

    public Resource[] resolveMapperLocations() {
        ResourcePatternResolver resourceResolver = new PathMatchingResourcePatternResolver();
        List<String> mapperLocations = new ArrayList<>();
        mapperLocations.add("classpath*:com/aaa/mapper/*Mapper*.xml");
        mapperLocations.add("classpath*:com/bbb/mapper/*Mapper*.xml");
        mapperLocations.add("classpath*:com/ccc/mapper/*Mapper*.xml");
        List<Resource> resources = new ArrayList();
        if (mapperLocations != null) {
            for (String mapperLocation : mapperLocations) {
                try {
                    Resource[] mappers = resourceResolver.getResources(mapperLocation);
                    resources.addAll(Arrays.asList(mappers));
                } catch (IOException e) {
                    // ignore
                }
            }
        }
        return resources.toArray(new Resource[resources.size()]);
    }