我用的是eclipse编程，结果当我创建一个hello.tld文件时，经常报错，报错如下

Referenced file contains errors (http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_1.xsd). For more information, right click on the 
 message in the Problems View and select "Show Details..."

求大神解决！