springboot 显式配置数据源 解决mybatis注解无法被识别问题

@Configuration
@MapperScan(basePackages = {"com.xxxx.xxxx.xxxxx.mapper"}, sqlSessionFactoryRef = "sqlsession1")
public class DataSConfig {
    @Bean(name = "test1DataSource")//注入到这个容器
    @ConfigurationProperties(prefix = "spring.datasource")//表示取application.properties配置文件中的前缀
    @Primary    //primary是设置优先，因为有多个数据源，在没有明确指定用哪个的情况下，会用带有primary的，这个注解必须有一个数据源要添加

    public DataSource testDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "sqlsession1")
    @Primary
    //@Qualifier("xxx")的含义是告诉他使用哪个DataSource
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        return bean.getObject();
    }

    @Bean(name = "test1TransactionManager")//配置事务
    @Primary
    public DataSourceTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "test1SqlSessionTemplate")
    @Primary
    public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("sqlsession1") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

}

spring:
  datasource:
    username: root
    password: xxxx
    jdbc-url: jdbc:mysql://xxxxx
    driver-class-name: com.mysql.cj.jdbc.Driver
#不同的springboot版本有差异，如果出错就网上搜一下