今天反复出现这个错误，反复出现，改了一些代码就又报这个错误，但是一刷新pom.xml就又可以正常跑起来了，也不知道是不是缓存还是啥的问题，但总之下面的解决方法确实有效，记录一下。
错误信息：

***************************
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).

但是解决方法就是在pom.xml里面加资源路径

		<resources>
			<!--资源文件路径-->
			<resource>
				<directory>src/main/resources</directory>
			</resource>
			<!--配置文件路径-->
			<resource>
				<directory>src/main/java</directory>
				<includes>
					<include>**/*.properties</include>
					<include>**/*.xml</include>
					<include>**/*.yml</include>
				</includes>
				<filtering>false</filtering>
			</resource>
			<resource>
				<directory>src/main/resources</directory>
				<includes>
					<include>**/*.properties</include>
					<include>**/*.xml</include>
					<include>**/*.yml</include>
				</includes>
				<filtering>false</filtering>
			</resource>
		</resources>