Failed to configure a DataSource: ‘url‘ attribute is not specified and no embedded datasource could

问题：先来看看异常SpringBoot启动的时候出现的异常信息

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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).

Disconnected from the target VM, address: '127.0.0.1:65525', transport: 'socket'

Process finished with exit code 0

解决：

1.检查pom.xml 项目数据库jar 是否引用；

2.查看**.properties或**.yml 配置文件是否配置数据库链接池；

3.查看spring - datasource - url 配置的地址格式错误需要转义等；yml或者properties文件可能没有被扫描到（情况比较少，如果按照标准命名都会被默认扫描）；

4.数据库是否能连接上，用工具试试。