some characters cannot be mapped using iso-8859-1 character encoding

Eclipse中新建一个.properties文件，如果输入中文保存时就会提示错误

Reason:
some characters cannot be mapped using "ISO-8859-1" character encoding.
Either change the encoding or remove the characters which are not supported
by the "ISO-8859-1" character encoding.

解决办法：
菜单->Window->Preferences->General->Content Types->Text->Java Properties File设置Default encoding,把ISO-8859-1改为UTF-8  然后update.