问题1：eclipse中整体编码设置
Window-Preferences-General-Workspace-Text file encoding中将Other设为UTF-8
问题2：eclipse中jsp页面编码初始化设置
Window-Preferences-Web-JSP Files-Encoding设为ISO 10646/Unicode(UTF-8)
问题3：eclipse中改背景色
Window-Preferences-General-Appearance-Theme设为dark
