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Spring执行sql脚本文件 Spring执行sql脚本文件的方法

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本篇解决 Spring 执行SQL脚本(文件)的问题。

场景描述可以不看。

场景描述:

我在运行单测的时候,也就是 Spring 工程启动的时候,Spring 会去执行 classpath:schema.sql(后面会解释),我想利用这一点,解决一个问题:

一次运行多个测试文件,每个文件先后独立运行,而上一个文件创建的数据,会对下一个文件运行时造成影响,所以我要在每个文件执行完成之后,重置数据库,不单单是把数据删掉,而 schema.sql 里面有 drop table 和create table。

解决方法:

//Schema 处理器
@Component
public class SchemaHandler {
  private final String SCHEMA_SQL = "classpath:schema.sql";
  @Autowired
  private DataSource datasource;
  @Autowired
  private SpringContextGetter springContextGetter;

  public void execute() throws Exception {
    Resource resource = springContextGetter.getApplicationContext().getResource(SCHEMA_SQL);
    ScriptUtils.executeSqlScript(datasource.getConnection(), resource);
  }
}

// 获取 ApplicationContext
@Component
public class SpringContextGetter implements ApplicationContextAware {

  private ApplicationContext applicationContext;

  public ApplicationContext getApplicationContext() {
    return applicationContext;
  }

  @Override
  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    this.applicationContext = applicationContext;
  }
}

备注:

关于为何 Spring 会去执行 classpath:schema.sql,可以参考源码

org.springframework.boot.autoconfigure.jdbc.DataSourceInitializer#runSchemaScripts

private void runSchemaScripts() {
    List<Resource> scripts = getScripts("spring.datasource.schema",
        this.properties.getSchema(), "schema");
    if (!scripts.isEmpty()) {
      String username = this.properties.getSchemaUsername();
      String password = this.properties.getSchemaPassword();
      runScripts(scripts, username, password);
      try {
        this.applicationContext
            .publishEvent(new DataSourceInitializedEvent(this.dataSource));
        // The listener might not be registered yet, so don't rely on it.
        if (!this.initialized) {
          runDataScripts();
          this.initialized = true;
        }
      }
      catch (IllegalStateException ex) {
        logger.warn("Could not send event to complete DataSource initialization ("
            + ex.getMessage() + ")");
      }
    }
  }

/**
 * 默认拿 classpath*:schema-all.sql 和 classpath*:schema.sql
 */
private List<Resource> getScripts(String propertyName, List<String> resources,
      String fallback) {
    if (resources != null) {
      return getResources(propertyName, resources, true);
    }
    String platform = this.properties.getPlatform();
    List<String> fallbackResources = new ArrayList<String>();
    fallbackResources.add("classpath*:" + fallback + "-" + platform + ".sql");
    fallbackResources.add("classpath*:" + fallback + ".sql");
    return getResources(propertyName, fallbackResources, false);
  }

参考:https://github.com/spring-projects/spring-boot/issues/9048

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