求教Springboot+mybatis的配置

@Configuration
@EnableTransactionManagement
@MapperScan("com.*.*.mapper")
public class DataBaseConfig {

private final Logger log = LoggerFactory.getLogger(DataBaseConfig.class);

@Bean
@Primary
@ConfigurationProperties(prefix = "datasource.primary")
public DataSource dataSource() {
log.debug("Configuring Datasource");
return new DruidDataSource();
}

@Bean
public PlatformTransactionManager txManager() {
return new DataSourceTransactionManager(dataSource());
}

@Bean
public SqlSessionFactory sqlSessionFactoryBean() throws Exception {

SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource());

PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

sqlSessionFactoryBean.setMapperLocations(resolver
.getResources("classpath:/mapper/*.xml"));
return sqlSessionFactoryBean.getObject();

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