在pom.xml中新增如下依賴，然後重新啟動SpringBoot應用。

        <!-- 引入Spring Boot 內嵌的Tomcat對jsp的解析包-->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <!--<version>8.5.16</version>-->
        </dependency>

        <!-- servlet 依賴的jar包start-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
        </dependency>

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

        <!-- jstl標籤 依賴的jar包start-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>