解决jdk8之The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .

之前在myeclipse10上配置jdk1.8，就报这个错误：

The type java.lang.CharSequence cannot be resolved. It is indirectly referenced from required .class files

The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files

换成1.7就好了，后来我换1.8jdk新建一个工程，写了一个action类继承ActionSupport还是报错，有此判定，肯定不是编译的问题了，之前也clean多次。

异常原因：是因为myeclipse10不支持jdk1.8导致，换成最新的myeclipse或者eclipse，然后配置jdk1.8，问题得到解决。