springboot启动报错 Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

新建了一个springboot项目报一下错误：

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

原因是加入了mybatis依赖而没有指定数据库url属性，解决方式：

1、去除mybatis依赖，即去除

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.0.0</version>
</dependency>

2、加入数据库相关的配置，即加上

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/db?useUnicode=true&characterEncoding=utf-8&autoReconnect=true&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&useSSL=false
    username: xxx
    password: xxx

3、在启动类的@EnableAutoConfiguration或@SpringBootApplication中添加exclude = {DataSourceAutoConfiguration.class}，排除此类的autoconfig。即

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
public class YourApplication {  

    public static void main(String[] args) {
        SpringApplication.run(YourApplication.class, args);
    }
}

启动以后就可以正常运行。