一、配置文件
pom.xm

 <dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.48</version><scope>runtime</scope>
</dependency>

application.yml

spring:application:name: double-datasource-mybatis-jdbcprofiles:active: devjackson:date-format: yyyy-MM-dd HH:mm:sstime-zone: GMT+8server:port: 8008mybatis:#mapper-locations: classpath*:mapper/*.xmltype-aliases-package: com.mk.entity.*  # 注意：对应实体类的路径configuration:map-underscore-to-camel-case: truesys:one-mybatis:type: com.alibaba.druid.pool.DruidDataSourcedriver-class-name: com.mysql.jdbc.Driverurl: jdbc:mysql://192.168.1.2:3307/testdb01?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghaiusername: rootpassword: admin123druid:initial-size: 10max-active: 100min-idle: 10max-wait: 60000pool-prepared-statements: truemax-pool-prepared-statement-per-connection-size: 20time-between-eviction-runs-millis: 60000min-evictable-idle-time-millis: 300000validation-query: SELECT 1 FROM DUALtest-while-idle: truetest-on-borrow: falsetest-on-return: falsefilter:stat:log-slow-sql: trueslow-sql-millis: 1000merge-sql: trueenabled: truewall:config:multi-statement-allow: truestat-view-servlet:enabled: falsetwo-jdbc:type: com.alibaba.druid.pool.DruidDataSourcedriver-class-name: com.mysql.jdbc.Driverurl: jdbc:mysql://192.168.1.2:3307/testdb02?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghaiusername: rootpassword: admin123druid:initial-size: 10max-active: 100min-idle: 10max-wait: 60000pool-prepared-statements: truemax-pool-prepared-statement-per-connection-size: 20time-between-eviction-runs-millis: 60000min-evictable-idle-time-millis: 300000validation-query: SELECT 1 FROM DUALtest-while-idle: truetest-on-borrow: falsetest-on-return: falsefilter:stat:log-slow-sql: trueslow-sql-millis: 1000merge-sql: trueenabled: truewall:config:multi-statement-allow: truestat-view-servlet:enabled: false

二、配置Configuration Bean

（1）第一个Mybatis数据源配置(主)

public class MybatisDataSourceConfig {@Primary@Bean@ConfigurationProperties(prefix = "sys.one-mybatis.datasource")public DataSourceProperties oneDataSourceProperties() {return new DataSourceProperties();}@Primary@Beanpublic DataSource oneDataSource(@Qualifier("oneDataSourceProperties") DataSourceProperties dataSourceProperties) {DataSource dataSource = dataSourceProperties.initializeDataSourceBuilder().build();return dataSource;}@Primary@Bean@ConfigurationProperties(prefix = "mybatis")public MybatisProperties oneMybatisProperties(){return new MybatisProperties();}@Primary@Beanpublic SqlSessionFactoryBean oneSqlSessionFactoryBean(@Qualifier("oneDataSource") DataSource dataSource,@Qualifier("oneMybatisProperties")MybatisProperties mybatisProperties){SqlSessionFactoryBean bean = new SqlSessionFactoryBean();bean.setDataSource(dataSource);bean.setMapperLocations(mybatisProperties.resolveMapperLocations());bean.setTypeAliasesPackage(mybatisProperties.getTypeAliasesPackage());bean.setConfigurationProperties(mybatisProperties.getConfigurationProperties());bean.setConfiguration(mybatisProperties.getConfiguration());bean.setConfigLocation(Optional.ofNullable(mybatisProperties.getConfigLocation()).map(location->{try {ResourcePatternResolver resourceResolver = new PathMatchingResourcePatternResolver();return resourceResolver.getResource(location);} catch (Exception var3) {return null;}}).orElse(null));return bean;}@Primary@Beanpublic DataSourceTransactionManager oneTransactionManager(@Qualifier("oneDataSource") DataSource dataSource) {return new DataSourceTransactionManager(dataSource);}@Primary@Beanpublic SqlSessionTemplate oneSqlSessionTemplate(@Qualifier("oneSqlSessionFactoryBean") SqlSessionFactoryBean sqlSessionFactoryBean) throws Exception{return new SqlSessionTemplate(sqlSessionFactoryBean.getObject());}}

（2）第二个jdbc配置

public class JdbcDataSourceConfig {@Bean@ConfigurationProperties(prefix = "sys.jdbc-two")public DataSourceProperties jdbcDataSourceProperties(){return new DataSourceProperties();}@Beanpublic DataSource jdbcDataSource(@Autowired @Qualifier("jdbcDataSourceProperties") DataSourceProperties dataSourceProperties){DataSource dataSource = dataSourceProperties.initializeDataSourceBuilder().build();return dataSource;}@Beanpublic JdbcTemplate jdbcTemplate(@Autowired @Qualifier("jdbcDataSource") DataSource dataSource){return new JdbcTemplate(dataSource);}@Beanpublic DataSourceTransactionManager twoTransactionManager(@Autowired @Qualifier("jdbcDataSource") DataSource dataSource) {return new DataSourceTransactionManager(dataSource);}
}

（3）导入配置

@Configuration
@Import({MybatisDataSourceConfig.class, JdbcDataSourceConfig.class})
public class DataSourceConfig {}

注意：去掉默认自动配置

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class, JdbcTemplateAutoConfiguration.class, MybatisAutoConfiguration.class})
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}}