这篇文章主要介绍了Spring执行sql脚本文件的方法,小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看看吧
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#runschemascriptsprivate 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
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持CodeAE代码之家。
原文链接:https://segmentfault.com/a/1190000018344940
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