JSP——【報錯】——The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from r

出現The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files的錯誤提示，如下圖所示： 位置：package前 原因：jdk版本不一致 解決方法： 右擊該項目工程-> Build Path-> Configure Build Path->

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