启动服务器, 未报错;

访问首页, 报错500:

java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config

google后到Stack Overflow, 得到答案, 增加两个依赖 jstl-api 和 jstl-impl :

　　　　 <!-- jstl -->
        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- jstl-api -->
        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>jstl-api</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- jstl-impl -->
        <dependency>
            <groupId>org.glassfish.web</groupId>
            <artifactId>jstl-impl</artifactId>
            <version>1.2</version>
        </dependency>

问题得以解决.