Access restriction: The method encode(byte[]) from the type CharacterEncoder，Access restriction: The type FileURLConnection is n

像这样的异常信息，是eclipse设置问题，问题： Access restriction: The type FileURLConnection is not accessible due to restriction on required library C:/Program Files/Java/jre6/lib/rt.jar 解决方法： 这个是eclipse设置问题，它默认把这些受访问限制的API设成了ERROR，只要把 Windows-Preferences-Java-Complicer-Errors/Warnings 里面的Deprecated and restricted API中的Forbidden references(access rules)选为Warning就可以编译通过了。