Failed to configure a DataSource 'url' attribute问题解决

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 APPLICATION FAILEDTO START

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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).

Disconnected from the target VM, address: '127.0.0.1:58792', transport: 'socket'

Processfinished withexitcode 0

未指定“url”属性，无法配置嵌入的数据源。

原因：由于添加了数据库组件，所以autoconfig会去读取数据源配置，新建的项目还没有配置数据源，所以会导致异常出现。

解决办法：

在启动类加如下内容：

即：@SpringBootApplication(exclude={ DataSourceAutoConfiguration.class})

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