用eclipse开发的jsp项目当导入import javax.servlet.http.HttpServletRequest; 时候老提醒错误
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需要导入servlet-api.jar包
导入方法:
工程上右键----》Properties --->Resource下Java Build Path 右侧点击Add External JARs 然后选择tomcat安装目录lib下的servlet-api.jar即可
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