解决 If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.

报错异常

 

***************************
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).

 

解决方案

package cn.wqlog.javademo.java_demo;
​
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
​
//输出日志 Log
@Slf4j
//添加 exclude = DataSourceAutoConfiguration.class
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
//@SpringBootApplication
public class JavaDemoApplication {
​
    public static void main(String[] args) {
        SpringApplication.run(JavaDemoApplication.class, args);
        log.info("项目启动成功、！");
    }
​
}
//可能是因为spring boot 会默认加载org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration这个类，而DataSourceAutoConfiguration类使用了@Configuration注解向spring注入了dataSource bean，又因为项目（eureka-server模块和短信模块）中并没有关于dataSource相关的配置信息，所以当spring创建dataSource bean时因缺少相关的信息就会报错。