1、多数据源配置文件

2、配置项

多个数据源配置项中分别添加配置

bean.getObject().getConfiguration().setMapUnderscoreToCamelCase(true); //配置驼峰命名

或者
参考地址

@Configuration
@MapperScan(basePackages = "it.aspirin.riderserver.mapper.mysql", sqlSessionTemplateRef = "mySqlSessionTemplate")
public class MySQLDataSourceConfig {
 
    /**
     * 配置多数据源导致下划线命名映射为驼峰失效，需要在这里加一个配置，并在下面SqlSessionFactory方法中引入
     *
     * @return 配置
     */
    @Bean
    @ConfigurationProperties(prefix = "mybatis.configuration")
    public org.apache.ibatis.session.Configuration globalConfiguration() {
        return new org.apache.ibatis.session.Configuration();
    }
 
    /**
     * 自动装配时当出现多个Bean候选者时，被注解为@Primary的Bean将作为首选者，否则将抛出异常
     */
    @Bean(name = "mysqlDataSource")
    @Primary
    @ConfigurationProperties(prefix = "spring.datasource.mysql")
    public DataSource dataSource() {
        return DataSourceBuilder.create().build();
    }
 
    @Bean(name = "mySqlSessionFactory")
    @Primary
    public SqlSessionFactory sqlSessionFactory(@Qualifier("mysqlDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        //这里将下划线映射为驼峰的配置引入
        bean.setConfiguration(globalConfiguration());
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/mysql/*.xml"));
        return bean.getObject();
    }
 
    /**
     * 创建事务
     *
     * @param dataSource
     * @return
     */
    @Bean(name = "mysqlTransactionManager")
    @Primary
    public DataSourceTransactionManager transactionManager(@Qualifier("mysqlDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }
 
    /**
     * 用于注入dao
     *
     * @param sqlSessionFactory
     * @return
     * @throws Exception
     */
    @Bean(name = "mySqlSessionTemplate")
    @Primary
    public SqlSessionTemplate SqlSessionTemplate(@Qualifier("mySqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
 
    @Bean(name = "mysqlDataSource")
    public JdbcTemplate mysqlJdbcTemplate(@Qualifier(value = "mysqlDataSource") DataSource dataSource) {
        return new JdbcTemplate(dataSource);
    }
}