The import javax.servlet cannot be resolved和The method setCharacterEncoding(String) is undefined for

1、The import javax.servlet cannot be resolved 導包不成功 在Eclipse中，右擊項目，選擇Build Path->configure build path->Libraries->Add External JARs，找到你計算機中tomcat的解壓路徑，在lib文件夾下選中"servlet-api.jar"，添加點擊「apply」 2、The met

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