1、在pom.xml文件中导入jsp依赖的jar包，一个是jstl标签，一个是jsp的引擎

<dependency>
    <groupId>org.apache.taglibs</groupId>
    <artifactId>taglibs-standard-spec</artifactId>
    <version>1.2.5</version>
</dependency>
<dependency>
    <groupId>org.apache.taglibs</groupId>
    <artifactId>taglibs-standard-impl</artifactId>
    <version>1.2.5</version>
</dependency>
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
    <version>8.5.34</version>
</dependency>

2、在SpringBoot的全局配置文件中修改SpringBoot的默认视图解析器的前缀和后缀

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

3、创建一个Controller测试一下行不行

存放在src/main/webapp/WEB-INF/jsp/index.jsp