The project was not built since its build path is incomplete. Cannot find the class file for java.io.ObjectInputStream. Fix the build path then try building this project day
原因：JDK版本太高(Myeclipse10)
选择低版本的JDk :window>java>installed JREs 选择Sun JDK 1.6.0_13(自带的或自己重新安装低版本JDK)