如何通过注解实现创建一级表头和二级表头，并对一二级表头设置不同的字号和背景色

Description

Contributor guide

Tech stack

java

Domain

apitooling

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-2 days

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

fresh

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

JavaEasyExcel basics

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

35

Research direction

Investigate how @ExcelProperty and @HeadFontStyle annotations are processed in EasyExcel. Look at the annotation handlers in the com.alibaba.excel.annotation package and the ExcelHeadProperty class. Modify the logic to apply different font sizes for each level of the header hierarchy, possibly by adding a new annotation parameter like @HeadFontStyle(level = 1). The existing implementation applies font styles globally; a per level override is needed.