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

出现The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files的错误提示，如下图所示： 位置：package前 原因：jdk版本不一致 解决方法： 右击该项目工程-> Build Path-> Configure Build Path->

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