详解SpringBoot Mybatis如何对接多数据源

spring:
  #数据库连接配置
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/springtest
    username: root
    password: root

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/springtest
spring.datasource.username=root
spring.datasource.password=root

spring:
  #数据库连接配置
  datasource1:
    driver-class-name: com.mysql.cj.jdbc.Driver
    jdbc-url: jdbc:mysql://127.0.0.1:3306/springtest2
    username: root
    password: root
  datasource2:
    driver-class-name: com.mysql.cj.jdbc.Driver
    jdbc-url: jdbc:mysql://127.0.0.1:3306/springtest
    username: root
    password: root

@Configuration
@MapperScan(basePackages = "com.zhanfu.springboot.demo.mapper1", sqlSessionFactoryRef = "sqlSessionFactory1")
public class DataSource1Config {
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource1")
    public DataSource dataSource1() {
        return DataSourceBuilder.create().build();
    }
    @Bean
    public SqlSessionFactory sqlSessionFactory1() throws Exception {
        SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
        sessionFactoryBean.setDataSource(dataSource1());
        String locationPattern = "classpath*:/mapper1/*.xml";
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        sessionFactoryBean.setMapperLocations(resolver.getResources(locationPattern));
        return sessionFactoryBean.getObject();
    }
    @Bean(name = "sqlSessionTemplate1")
    public SqlSessionTemplate sqlSessionTemplate1(@Qualifier("sqlSessionFactory1") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

@Configuration
@MapperScan(basePackages = "com.zhanfu.springboot.demo.mapper2", sqlSessionFactoryRef = "sqlSessionFactory2")
public class DataSource2Config {
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource2")
    public DataSource dataSource2() {
        return DataSourceBuilder.create().build();
    }
    @Bean
    public SqlSessionFactory sqlSessionFactory2() throws Exception {
        SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
        sessionFactoryBean.setDataSource(dataSource2());
        String locationPattern = "classpath*:/mapper2/*.xml";
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        sessionFactoryBean.setMapperLocations(resolver.getResources(locationPattern));
        return sessionFactoryBean.getObject();
    }
    @Bean(name = "sqlSessionTemplate2")
    public SqlSessionTemplate sqlSessionTemplate2(@Qualifier("sqlSessionFactory2") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
    @Bean(name = "productMapper")
    public ProductMapper mapper2(@Qualifier("sqlSessionTemplate2") SqlSessionTemplate sqlSessionTemplate) throws Exception {
        return sqlSessionTemplate.getMapper(ProductMapper.class);
    }
}

@Configuration
public class TransactionManagerConfig {
    @Autowired
    private DataSource dataSource1;
    @Autowired
    private DataSource dataSource2;
    @Bean
    public PlatformTransactionManager txManager1() {
        return new DataSourceTransactionManager(dataSource1);
    }
    @Bean
    public PlatformTransactionManager txManager2() {
        return new DataSourceTransactionManager(dataSource2);
    }
}