The type javax.servlet.http.HttpServletRequest cannot be resolved. It is indirectly referenced fro

錯誤：

The type javax.servlet.http.HttpServletRequest cannot be resolved. It is indirectly

 referenced from required .class files

缺少jar包，我增加了JavaEE 5的包即可

一般缺少的包，可這麼做：

1、右鍵工程找到build path項

2、找到Add Libraries

3、點擊myEclipse Libraries，Next

4、添加JavaEE 5