POI解析excel的sheet名称和表头

前提：需要引入POI的jar包。

public class TemplateFileSheetParseVO {

    /**
     * 表名称
     */
    private String tableName;

    /**
     * 列名称
     */
    private List<String> columnNames;
}

private TemplateFileSheetParseVO extractContent(File file, Integer sheetIndex) throws IOException {

    Workbook wb = WorkbookFactory.create(new FileInputStream(file));
    try {
        Sheet sheet = wb.getSheetAt(sheetIndex);
        String sheetName = sheet.getSheetName();
        Row headerRow = sheet.getRow(0);
        if(headerRow == null){
            throw new BusinessException("第" + (sheetIndex + 1) + "个sheet,不存在表头");
        }
        int columnCount = sheet.getRow(0).getLastCellNum();
        if(columnCount <= 0){
            throw new BusinessException("表头不存在");
        }
        List<String> headers = new ArrayList<>();

        for (int i = 0; i < columnCount; i++) {
            Cell cell = headerRow.getCell(i);
            headers.add(cell.getStringCellValue());
        }

        TemplateFileSheetParseVO vo = new TemplateFileSheetParseVO();
        vo.setTableName(sheetName);
        vo.setColumnNames(headers);
        return vo;
    } catch (BusinessException e) {
        throw e;
    }catch (Exception e) {
        log.error("", e);
        throw new BusinessException("-1", e.getMessage());
    } finally {
        try {
            if (wb != null) {
                wb.close();
            }
        } catch (IOException e) {
            log.info(e.getMessage());
        }
    }
}