今天寫代碼時，發現HttpServletResponse response = ServletActionContext.getResponse();這句報紅叉，提示The type javax.servlet.http.HttpServletResponse cannot be resolved. It is indirectly referenced from required .class files，并要求configuration build path，經過嘗試之后，發現解決辦法。

錯誤情況：HttpServletResponse response = ServletActionContext.getResponse();這句報紅叉

提示：The type javax.servlet.http.HttpServletResponse cannot be resolved. It is indirectly referenced from required .class files，并要求configuration build path

解決辦法：點擊提示中的configuration build path（或者右鍵項目，點擊Build Path->configuration build path），打開build path界面后，選擇Libraries選項卡，并單擊Add Library，如圖

選擇MyEclipse Libraries，點擊Next

找到Java EE 5，點擊Finish

再看代碼，紅叉已經解決