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
