XLSX文件导出问题

描述

贡献者指南

技术栈

java

领域

backendperformance

议题类型

research

难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。

3

预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。

half day

活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。

fresh

清晰度议题是否清楚说明期望改动、验收标准和下一步。

mostly clear

前置要求

JavaOutputStream understandingExcel file format basics

新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。

45

研究方向

First, examine the EasyExcel source code, particularly the ExcelWriter and its write method to understand how data is flushed to the OutputStream. The issue likely arises because the XLSX format requires all sheet data to be written before finalizing the ZIP structure (due to the XML schema). To verify, look at the `write()` method in `com.alibaba.excel.ExcelWriter` and the `finish()` method. Consider whether streaming via a custom OutputStream that writes chunks as they come is feasible. Check if there are any open issues or discussions about streaming export in the repository. Suggest comparing with libraries like Apache POI that handle streaming differently.