如何解决springboot中的错误“需要属性'dataSource'”

Question

我使用两个数据源，pg和oracle。当我使用javaconfig创建数据源时，数据源为null。

@Configuration
public class DataSourceConfig {

    @Autowired
    private DbConfigProperties dbConfigProperties;

    @Primary
    @Bean("pgDataSource")
    public DataSource pgDataSource() {
        HikariDataSource hikariDataSource = new HikariDataSource();
        hikariDataSource.setDriverClassName(dbConfigProperties.getPgDriverClassName());
        hikariDataSource.setUsername(dbConfigProperties.getPgUsername());
        hikariDataSource.setPassword(dbConfigProperties.getPgPassword());
        hikariDataSource.setJdbcUrl(dbConfigProperties.getPgUrl());
        hikariDataSource.setIdleTimeout(dbConfigProperties.getIdleTimeout());
        hikariDataSource.setConnectionTimeout(dbConfigProperties.getConnectionTimeout());
        hikariDataSource.setMaximumPoolSize(dbConfigProperties.getMaximumPoolSize());
        hikariDataSource.setMinimumIdle(dbConfigProperties.getMinimumIdle());
        return hikariDataSource;
    }
}


@Configuration
public class PgMybatisConfig {

    @Autowired
    @Qualifier("pgDataSource")
    private DataSource pgDataSource;

    @Autowired
    @Qualifier("pgPageInterceptor")
    private PageInterceptor pgPageInterceptor;

    @Bean("pgSqlSessionFactory")
    public SqlSessionFactory pgSqlSessionFactory() throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setTypeAliasesPackage("com.zycfc.entity.tag");
        sqlSessionFactoryBean.setMapperLocations(new ClassPathResource[]{new ClassPathResource("mapper/tag/*.xml")});
        sqlSessionFactoryBean.setConfigLocation(new ClassPathResource("mybatis/mybatis-config.xml"));
        sqlSessionFactoryBean.setPlugins(new Interceptor[]{pgPageInterceptor});
        sqlSessionFactoryBean.setDataSource(pgDataSource);//here datasource is null
        return sqlSessionFactoryBean.getObject();
    }
}