查找下面这些资料:
The standard.jar (taglib) library is used to enable the JSTL expression language in JSP page, and it’s always used together with the jstl.jar together.
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
....
</html>
用maven管理的话,添加下面的依赖就可以了。
<!-- standard.jar -->
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.1.2</version>
</dependency>
参考地址:http://www.mkyong.com/maven/download-standard-jar-taglib-from-maven/