第二章：启动springboot，输出 hellow springboot

1.新建一个controller包，新建一个test测试类，使用@RestController进行注解，表示是一个controller，使用注解@RequestMapping设置请求路径，点击运行项目中springbootboot启动类，如图则表示启动成功

然后在网页中输入http://localhost:8080/hellow 即可访问到此方法，

@RestController
public class test {
    @RequestMapping(value = "/hellow")
    public String hellow(){
            return "hellow sprinboot";
    }
}

显示结果如图：

注：有的同学运行时可能会报如下错误

---

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

此时只需要给你的application加上
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)即可
如下代码所示：

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
public class FootdemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(FootdemoApplication.class, args);
    }
}

接下来这篇文章将进行springboot+mybatis框架的配置，链接：https://blog.youkuaiyun.com/qq_20489601/article/details/81335281