这篇博客记录了从MyEclipse切换到IDEA时遇到的项目启动问题。作者在导入MyEclipse项目到IDEA后，启动时出现'Failed to configure a DataSource'错误，原因是未指定'Datasource'的'url'属性且无法配置嵌入式数据源。解决方案是确保有application.properties文件，并将resources目录标记为资源文件夹。通过右键resources -> Mark Directory As -> Resources Root来解决问题。
初次使用idea之前一直使用myeclipse,在myeclipse中正常的项目导入ieda中后启动就报线面的错误！
百度了好久，浪费时间，最后发现时
在初次完成项目的构建后，启动项目时出错，提示信息“ Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured. ” ，这个异常很好理解，直接翻译成中文，一看便知了 “ 配置数据源失败:没有指定’url’属性，也不能配置嵌入式数据源。 ” ，具体的错误内容如下图：
APPLICATION FAILED TO START
Description:
Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.
Reason: Failed to determine a suitable driver class
Action:
Consider the following:
If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
APPLICATION FAILED TO START
Description:
Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.
Reason: Failed to determine a suitable driver class
Action:
Consider the following:
If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
解决办法：（我的情况是这样，记录一下，希望也能帮到你！）
有application.properties文件。把resources标记为资源文件夹。右击rescoures->mark directroy as->Resources Root
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