Access restriction: The type CachedRowSetImpl is not accessible due to restriction on required library C:glassfish3jdk7jrelib
t.jar
但能在rt.jar中找到CachedRowSetImpl的类文件。。。
解决方法：
要在project build path中先移除JRE System
Library，再加入库JRE System Library，之后就能够了。