SpringBoot报错 ：‘url‘ attribute is not specified and no embedded datasource could be configured.

(前面两种是大部分情况下可以解决的，如果尝试了网上的方法没有解决的可以直接跳至第3步) 

首先来看看我的报错信息 

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APPLICATION FAILED TO 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).

 

很明显，这就是我们的工程没有配置好数据源，起初我也是这样想的。然后我打开了度娘， 输入了自己的错误！很好，有很多解决方法，但是事不如人愿，我试了所有方法，还是报错！

1、我在application中加入了这个注释，然后报了一大堆 的东西！这里就不详细讲了

 

@SpringBootApplication(exclude = {DataSourceAutoConfigurat