springboot项目启动报错：Failed to configure a DataSource: ‘url‘ attribute is not specified......

问题：

Springboot项目启动报错：

Failed to configure a DataSource: 'url' attribute is not specified and

no embedded datasource could be configured

解决办法：

自己的这个项目不用连数据库，直接将@SpringBootApplication修改为@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})，就可以设置项目不连接数据库

@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})
public class Demo4Application {

    public static void main(String[] args) {

        SpringApplication.run(Demo4Application.class, args);
    }

}