springboot 启动时初始化数据库的步骤

@Bean
public DataSourceInitializer dataSourceInitializer(final DataSource dataSource) {
  ResourceDatabasePopulator resourceDatabasePopulator = new ResourceDatabasePopulator();
  resourceDatabasePopulator.addScript(new ClassPathResource("/data.sql"));
  DataSourceInitializer dataSourceInitializer = new DataSourceInitializer();
  dataSourceInitializer.setDataSource(dataSource);
  dataSourceInitializer.setDatabasePopulator(resourceDatabasePopulator);
  return dataSourceInitializer;
}

/** 
 * 用于补充：Hibernate无法自动创建视图的缺陷。 
 * 系统启动时(hibernate根据entity创建完基本的数据表后)，开始执行本注解下的sql文件中的SQL语言。 
 * 使用方法： 
 * @InitDataSource("sql文件路径(相对于resources路径下)") ---- 注解到对应的类上 
 * 比如：@InitDataSource("db/view/createView.sql)") 
 * 使用示例请参见：ResourceApplication.java 
 * 预了解详细的实现过程请参考：WebConfig.java 的 dataSourceInitializer方法 
 * @author huangtingxiang 
 */
@Target({ElementType.TYPE})   // 该注解用于类上 
@Retention(RetentionPolicy.RUNTIME) // 在运行时起作用 
@Component 
public @interface InitDataSource { 
  String\[\] value(); 
}

@Bean 
public DataSourceInitializer dataSourceInitializer(final DataSource dataSource) { 
  ResourceDatabasePopulator resourceDatabasePopulator = new ResourceDatabasePopulator(); 
  // 扫描com.mengyunzhi.measurement 包 找到InitDataSource注解的类(注解需使用到实现类上) 
 ClassPathScanningCandidateComponentProvider provider 
      = new ClassPathScanningCandidateComponentProvider(false); 
  provider.addIncludeFilter(new AnnotationTypeFilter(InitDataSource.class)); //添加包含的过滤信息 
 for (BeanDefinition beanDef : provider.findCandidateComponents("com.mengyunzhi.measurement")) { 
    Class<?> cl = null; 
    try { 
      cl = Class.forName(beanDef.getBeanClassName()); 
      InitDataSource initDataSource = cl.getAnnotation(InitDataSource.class); 
      String\[\] sqlFiles = initDataSource.value(); 
      for (String sql: sqlFiles) { 
        // 如果sql文件存在 加入数据库初始化中 否则抛出异常终止执行 
 ClassPathResource resource = new ClassPathResource("/" + sql); 
        if (resource.exists()) { 
          resourceDatabasePopulator.addScript(resource); 
        } else { 
          throw new DataSourceInitializerException("未找到资源文件:" + sql, cl); 
        } 
      } 
    } catch (ClassNotFoundException e) { 
      e.printStackTrace(); 
    } 
  } 
  DataSourceInitializer dataSourceInitializer = new DataSourceInitializer(); 
  dataSourceInitializer.setDataSource(dataSource); 
  dataSourceInitializer.setDatabasePopulator(resourceDatabasePopulator); 
  return dataSourceInitializer; 
}