支持Excel导出对象的多个子列表

RuoYi

2025-12-02 381151bc5020fe847e0556b6468b4dc289c56745

支持Excel导出对象的多个子列表

 ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/poi/ExcelUtil.java

@@ -147,12 +147,12 @@
    /**

     * 对象的子列表方法

     */

    private Method subMethod;

    private Map<String, Method> subMethods = new HashMap<>();



    /**

     * 对象的子列表属性

     */

    private List<Field> subFields;

    private Map<String, List<Field>> subFieldsMap = new HashMap<>();



    /**

     * 统计列表

@@ -225,7 +225,7 @@
            int titleLastCol = this.fields.size() - 1;

            if (isSubList())

            {

                titleLastCol = titleLastCol + subFields.size() - 1;

                titleLastCol = titleLastCol + subFieldsMap.values().size() - 1;

            }

            Row titleRow = sheet.createRow(rownum == 0 ? rownum++ : 0);

            titleRow.setHeightInPoints(30);

@@ -245,16 +245,17 @@
        {

            Row subRow = sheet.createRow(rownum);

            int column = 0;

            int subFieldSize = subFields != null ? subFields.size() : 0;

            for (Object[] objects : fields)

            {

                Field field = (Field) objects[0];

                Excel attr = (Excel) objects[1];

                CellStyle cellStyle = styles.get(StringUtils.format("header_{}_{}", attr.headerColor(), attr.headerBackgroundColor()));

                if (Collection.class.isAssignableFrom(field.getType()))

                {

                    Cell cell = subRow.createCell(column);

                    cell.setCellValue(attr.name());

                    cell.setCellStyle(styles.get(StringUtils.format("header_{}_{}", attr.headerColor(), attr.headerBackgroundColor())));

                    cell.setCellStyle(cellStyle);

                    int subFieldSize = subFieldsMap != null ? subFieldsMap.get(field.getName()).size() : 0;

                    if (subFieldSize > 1)

                    {

                        CellRangeAddress cellAddress = new CellRangeAddress(rownum, rownum, column, column + subFieldSize - 1);

@@ -266,7 +267,7 @@
                {

                    Cell cell = subRow.createCell(column++);

                    cell.setCellValue(attr.name());

                    cell.setCellStyle(styles.get(StringUtils.format("header_{}_{}", attr.headerColor(), attr.headerBackgroundColor())));

                    cell.setCellStyle(cellStyle);

                }

            }

            rownum++;

@@ -338,17 +339,17 @@
            Map<String, Integer> cellMap = new HashMap<String, Integer>();

            // 获取表头

            Row heard = sheet.getRow(titleNum);

            for (int i = 0; i < heard.getPhysicalNumberOfCells(); i++)

            if (heard == null)

            {

                throw new UtilException("文件标题行为空，请检查Excel文件格式");

            }

            for (int i = 0; i < heard.getLastCellNum(); i++)

            {

                Cell cell = heard.getCell(i);

                if (StringUtils.isNotNull(cell))

                {

                    String value = this.getCellValue(heard, i).toString();

                    cellMap.put(value, i);

                }

                else

                {

                    cellMap.put(null, i);

                }

            }

            // 有数据时才处理 得到类的所有field.

@@ -562,7 +563,8 @@
                Excel excel = (Excel) os[1];

                if (Collection.class.isAssignableFrom(field.getType()))

                {

                    for (Field subField : subFields)

                    List<Field> currentSubFields = subFieldsMap.get(field.getName());

                    for (Field subField : currentSubFields)

                    {

                        Excel subExcel = subField.getAnnotation(Excel.class);

                        this.createHeadCell(subExcel, row, column++);

@@ -575,7 +577,7 @@
            }

            if (Type.EXPORT.equals(type))

            {

                fillExcelData(index, row);

                fillExcelData(index);

                addStatisticsRow();

            }

        }

@@ -588,7 +590,7 @@
     * @param row 单元格行

     */

    @SuppressWarnings("unchecked")

    public void fillExcelData(int index, Row row)

    public void fillExcelData(int index)

    {

        int startNo = index * sheetSize;

        int endNo = Math.min(startNo + sheetSize, list.size());

@@ -596,7 +598,7 @@


        for (int i = startNo; i < endNo; i++)

        {

            row = sheet.createRow(currentRowNum);

            Row row = sheet.createRow(currentRowNum);

            T vo = (T) list.get(i);

            int column = 0;

            int maxSubListSize = getCurrentMaxSubListSize(vo);

@@ -612,6 +614,7 @@
                        if (subList != null && !subList.isEmpty())

                        {

                            int subIndex = 0;

                            List<Field> currentSubFields = subFieldsMap.get(field.getName());

                            for (Object subVo : subList)

                            {

                                Row subRow = sheet.getRow(currentRowNum + subIndex);

@@ -621,14 +624,14 @@
                                }



                                int subColumn = column;

                                for (Field subField : subFields)

                                for (Field subField : currentSubFields)

                                {

                                    Excel subExcel = subField.getAnnotation(Excel.class);

                                    addCell(subExcel, subRow, (T) subVo, subField, subColumn++);

                                }

                                subIndex++;

                            }

                            column += subFields.size();

                            column += currentSubFields.size();

                        }

                    }

                    catch (Exception e)

@@ -982,7 +985,7 @@
            {

                // 创建cell

                cell = row.createCell(column);

                if (isSubListValue(vo) && getListCellValue(vo).size() > 1 && attr.needMerge())

                if (isSubListValue(vo) && getListCellValue(vo) > 1 && attr.needMerge())

                {

                    if (subMergedLastRowNum >= subMergedFirstRowNum)

                    {

@@ -1393,10 +1396,11 @@
            }

            if (Collection.class.isAssignableFrom(field.getType()))

            {

                subMethod = getSubMethod(field.getName(), clazz);

                String fieldName = field.getName();

                subMethods.put(fieldName, getSubMethod(fieldName, clazz));

                ParameterizedType pt = (ParameterizedType) field.getGenericType();

                Class<?> subClass = (Class<?>) pt.getActualTypeArguments()[0];

                this.subFields = FieldUtils.getFieldsListWithAnnotation(subClass, Excel.class);

                subFieldsMap.put(fieldName, FieldUtils.getFieldsListWithAnnotation(subClass, Excel.class));

            }

        }



@@ -1591,7 +1595,7 @@
     */

    public boolean isSubList()

    {

        return StringUtils.isNotNull(subFields) && subFields.size() > 0;

        return !StringUtils.isEmpty(subFieldsMap);

    }



    /**

@@ -1599,24 +1603,32 @@
     */

    public boolean isSubListValue(T vo)

    {

        return StringUtils.isNotNull(subFields) && subFields.size() > 0 && StringUtils.isNotNull(getListCellValue(vo)) && getListCellValue(vo).size() > 0;

        return !StringUtils.isEmpty(subFieldsMap) && getListCellValue(vo) > 0;

    }



    /**

     * 获取集合的值

     */

    public Collection<?> getListCellValue(Object obj)

    public int getListCellValue(Object obj)

    {

        Object value;

        Collection<?> value;

        int max = 0;

        try

        {

            value = subMethod.invoke(obj, new Object[] {});

            for (String s : subMethods.keySet())

            {

                value = (Collection<?>) subMethods.get(s).invoke(obj);

                if (value.size() > max)

                {

                    max = value.size();

                }

            }

        }

        catch (Exception e)

        {

            return new ArrayList<Object>();

            return 0;

        }

        return (Collection<?>) value;

        return max;

    }



    /**