SpringBoot无法通过Maven打包——Failed to configure a DataSource: 'url' attribute is not specified and no

场景： Springboot使用maven打包时，报错。异常如下：

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).

原因分析：没有配置具体的数据源，找不到对应的url。可能原因是maven打包的时候没有将我们的配置文件进行打包。
解决方案：在pom.xml文件中引入一下application.properties配置文件即可

 <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>application.properties</include>
                </includes>
            </resource>
        </resources>
</build>