在pom.xml中加入以下jar 包

<!-- 引入Spring Boot 内嵌的Tomcat对jsp的解析包-->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>

<!-- servlet 依赖的jar包start-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
</dependency>

<!-- jsp 依赖的jar包start-->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
</dependency>

<!-- jstl标签 依赖的jar包start-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>

如果还是不行,就加入访问的项目路径: