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1、添加jar包

   			
    
     org.springframework.boot
    			
    
     spring-boot-starter-tomcat
    			
    
     provided
    		
   		
   			
    
     org.apache.tomcat.embed
    			
    
     tomcat-embed-jasper
    			
    
     provided
    		
   		
   			
    
     javax.servlet
    			
    
     jstl
    			
    
     1.2
    		
   

2、在src/main/下创建webapp文件夹，在webapp文件夹下创建WEB-INF文件夹，如图：

3、在DemoApplication里继承SpringBootServletInitializer，并添加@ServletComponentScan

package com.demo;import org.mybatis.spring.annotation.MapperScan;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.boot.web.servlet.ServletComponentScan;import org.springframework.boot.web.support.SpringBootServletInitializer;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@SpringBootApplication@RestController@ServletComponentScanpublic class DemoApplication extends SpringBootServletInitializer{	@RequestMapping("/")	public String home(){		return "hello world";	}	public static void main(String[] args) {		SpringApplication.run(DemoApplication.class, args);	}}

以上就完成了。在controller里添加跳转测试

@RequestMapping("/turnJsp")    public String turnJsp(){        return "login/login";    }

访问结果如图：