Description:

Failed to auto-configure a DataSource: ‘spring.datasource.url’ is not specified and no embedded datasource could be auto-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)

(一) 、启动时不需要数据源加载，但加载了数据源，数据源获取失败，异常报错，启动失败。

解决方法：

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)//去掉数据源
public class MySpringBootApplication {

public static void main(String[] args) {

    SpringApplication.run(MySpringBootApplication.class,args);
}

}

（二）、有数据源依旧报错，配置文件没有加载成功
可以尝试在pom.xml文件的build标签中加入如下内容：

      <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.yml</include>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.yml</include>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>