加入一下依赖
jstl-1.2.jar
standard-1.1.2.jar

<dependency>
<!--注意groupId不是javax.servlet.jsp.jstl-->
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>