常量字段值 (easy-excel 2.0.1 API)

vip.breakpoint.*

vip.breakpoint.constants.EasyExcelConstants
限定符和类型	常量字段	值
`public static final String`	`FONT_NAME`	`"\u6977\u4f53"`
`public static final String`	`OMIT_EXCEL_VALUE`	`"null"`