1、无法解析类型 javax.servlet.http.HttpServletRequest。从必需的 .class 文件间接引用了它
The type javax.servlet.http.HttpServletRequest cannot be resolved. - smartzhaomin的专栏 - CSDN博客
http://blog.csdn.net/smartzhaomin/article/details/19487907
The type javax.servlet.http.HttpServletRequest cannot be resolved. It is indirectly referenced from required .class files
是缺少serverlet的引用库,解决如下 1.工程右键-properties->java build path 2.在java build path的libraries tab页中选择Add external Jars...按钮 3. 选择eclipse的安装目录,我的是绿色版本,我本机的路径如下,你自己需要根据自己的路径查找添加。E:\eclipse-java-indigo-SR1-win32\eclipse\plugins 选择javax.servlet.jsp_2.0.0.v201101211617.jar;javax.servlet_2.5.0.v201103041518.jar 进行添加即可 注释:由于版本不同,文件包名可能稍有区别。
原文:http://www.cnblogs.com/rogge7/p/7241456.html