通过maven创建springboot项目启动出现404

• application.properties配置

spring.mvc.view.prefix=/WEB-INF/jsp/spring.mvc.view.suffix=.jsp

• 项目结构

• 控制器方法

package com.example.demo.controller;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controllerpublic class IndexController {    @RequestMapping("/")    public String index() {        return "index";    }}

• 启动项目访问localhost:8080，出现404

Whitelabel Error PageThis application has no explicit mapping for /error, so you are seeing this as a fallback.Thu Feb 28 22:59:29 CST 2019There was an unexpected error (type=Not Found, status=404).No message available

解决方法

• pom.xml添加依赖

        
     
      org.apache.tomcat.embed
         
     
      tomcat-embed-jasper
     
    
        
     
      javax.servlet
         
     
      jstl
     
    

• clean并刷新maven

• 重启并访问localhost:8080

打包为jar运行仍然出现404

• 打包插件版本设置为1.4.2.RELEASE，并且配置好资源目录

        
             
                  
       
        src/main/webapp
                   
                   
       
        META-INF/resources
                   
                       
        
         **/**
                    
                   
       
        false
               
          
         
             
                  
       
        org.springframework.boot
                   
       
        spring-boot-maven-plugin
                   
       
        1.4.2.RELEASE