***************************

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).

解决方法  1：             注解这样写：   

        @SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})

@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})

public class DemoApplication {

	public static void main(String[] args) {

		SpringApplication.run(DemoApplication.class, args);

	}

}

解决方案 2：

1,。添加如下依赖

     <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

            <!-- 移除嵌入式tomcat插件 不移除会启动报错 -->

            <exclusions>

                <exclusion>

                    <groupId>org.springframework.boot</groupId>

                    <artifactId>spring-boot-starter-tomcat</artifactId>

                </exclusion>

            </exclusions>

        </dependency>

2.必须要加否则启动

<dependency>

     <groupId>javax.servlet</groupId>

     <artifactId>javax.servlet-api</artifactId>

</dependency>