RuoYi
2026-04-17 397971378357db417763bd388c25cdeeaed5d33c
ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/poi/ExcelUtil.java
@@ -503,6 +503,82 @@
    }
    /**
     * 多 Sheet 导出 —— 将多个不同类型的数据集合写入同一 Excel,直接输出到 HttpServletResponse
     *
     * @param response HTTP 响应
     * @param sheets   Sheet 描述列表
     */
    public static void exportMultiSheet(HttpServletResponse response, List<ExcelSheet<?>> sheets)
    {
        if (sheets == null || sheets.isEmpty())
        {
            return;
        }
        SXSSFWorkbook wb = buildWorkbook(sheets);
        try
        {
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            response.setCharacterEncoding("utf-8");
            wb.write(response.getOutputStream());
        }
        catch (Exception e)
        {
            log.error("多Sheet导出Excel异常{}", e.getMessage());
        }
        finally
        {
            IOUtils.closeQuietly(wb);
        }
    }
    /**
     * 构建多 Sheet Workbook —— 创建 SXSSFWorkbook 并将所有 Sheet 数据写入
     *
     * @param sheets Sheet 描述列表
     * @return 已写入所有 Sheet 数据的 SXSSFWorkbook
     */
    @SuppressWarnings({ "rawtypes", "unchecked" })
    private static SXSSFWorkbook buildWorkbook(List<ExcelSheet<?>> sheets)
    {
        SXSSFWorkbook wb = new SXSSFWorkbook(500);
        for (ExcelSheet<?> excelSheet : sheets)
        {
            ExcelUtil util = new ExcelUtil(excelSheet.getClazz());
            util.initWithWorkbook(wb, excelSheet.getList(), excelSheet.getSheetName(), excelSheet.getTitle());
            util.writeSheet();
        }
        return wb;
    }
    /**
     * 使用外部传入的 Workbook 初始化(多 Sheet 导出专用)
     * 与 init() 的区别:不新建 Workbook,而是在已有 wb 上追加新 Sheet
     *
     * @param wb        已有工作簿
     * @param list      数据集合
     * @param sheetName Sheet 名称
     * @param title     大标题(可为空)
     */
    public void initWithWorkbook(SXSSFWorkbook wb, List<T> list, String sheetName, String title)
    {
        if (list == null)
        {
            list = new ArrayList<T>();
        }
        this.list      = list;
        this.sheetName = sheetName;
        this.title     = title != null ? title : "";
        this.type      = Type.EXPORT;
        this.rownum    = 0;
        this.wb        = wb;
        this.sheet     = wb.createSheet(sheetName);
        createExcelField();
        this.styles    = createStyles(wb);
        createTitle();
        createSubHead();
    }
    /**
     * 对list数据源将其里面的数据导入到excel表单
     *
     * @param sheetName 工作表的名称