Comments (1)
jerry92k
commented on May 24, 2024
엑셀 파싱 로직 효율화
변경사항
엑셀 파싱에 사용하는 XSSFWorkbook 구현체 생성시 InputStream 대신 File 객체 전달
관련 라이브러리 : apache.poi
개선 포인트
OPCPackage 객체를 생성할 때 차이가 발생한다.
- InputStream을 이용할 경우, 메모리에 전체 스트림을 올려서 읽은 후 zipfile로 만든 후 해당 zipfile을 기반으로 OPCPackage를 생성한다.
- File의 경우 처음 몇 바이트만 읽고 체크해서 파일이 정상인지 체크하고, zipfile 객체 생성시 file 객체 참조를 전달한다.
관련 정리글 : XSSFWorkbook 객체 생성 시 InputStream과 File 전달 차이
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