1.解决springBoot无法返回视图问题。

[code]@Controller
public class helloController {
@RequestMapping("/")
public String sayHello()
{
System.out.print("访问index");
return "login";
}
}

出现问题：

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Mon Jan 28 09:19:35 CST 2019

There was an unexpected error (type=Not Found, status=404).

No message available

解决：

加入依赖

[code]		<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

注意：加入依赖后要注意pom.xml是否有红色下划线，若是有红色下划线，注释掉重新加入依赖。（我就是栽在这儿）。