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| | | import java.util.Map;
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| | | import java.util.Set;
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| | | import java.util.stream.Collectors;
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| | | import javax.servlet.http.HttpServletResponse;
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| | | import jakarta.servlet.http.HttpServletResponse;
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| | | import org.apache.commons.lang3.ArrayUtils;
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| | | import org.apache.commons.lang3.RegExUtils;
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| | | import org.apache.commons.lang3.reflect.FieldUtils;
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| | |
| | | public static final String FORMULA_REGEX_STR = "=|-|\\+|@";
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| | |
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| | | public static final String[] FORMULA_STR = { "=", "-", "+", "@" };
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| | |
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| | | /**
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| | | * 单元格样式缓存
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| | | */
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| | | private Map<String, CellStyle> cellStyleCache = new HashMap<String, CellStyle>();
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| | |
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| | | /**
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| | | * Excel sheet最大行数,默认65536
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| | |
| | | Object val = this.getCellValue(row, entry.getKey());
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| | |
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| | | // 如果不存在实例则新建.
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| | | entity = (entity == null ? clazz.newInstance() : entity);
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| | | entity = (entity == null ? clazz.getDeclaredConstructor().newInstance() : entity);
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| | | // 从map中得到对应列的field.
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| | | Field field = (Field) entry.getValue()[0];
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| | | Excel attr = (Excel) entry.getValue()[1];
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| | |
| | | response.setCharacterEncoding("utf-8");
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| | | this.init(list, sheetName, title, Type.EXPORT);
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| | | exportExcel(response);
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| | | }
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| | |
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| | | /**
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| | | * 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
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| | | *
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| | | * @param response HTTP 响应
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| | | * @param sheets Sheet 描述列表
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| | | */
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| | | public static void exportMultiSheet(HttpServletResponse response, List<ExcelSheet<?>> sheets)
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| | | {
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| | | if (sheets == null || sheets.isEmpty())
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| | | {
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| | | return;
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| | | }
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| | | SXSSFWorkbook wb = buildWorkbook(sheets);
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| | | try
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| | | {
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| | | response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
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| | | response.setCharacterEncoding("utf-8");
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| | | wb.write(response.getOutputStream());
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| | | }
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| | | catch (Exception e)
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| | | {
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| | | log.error("多Sheet导出Excel异常{}", e.getMessage());
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| | | }
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| | | finally
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| | | {
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| | | IOUtils.closeQuietly(wb);
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| | | }
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| | | }
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| | |
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| | | /**
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| | | * 构建多 Sheet Workbook —— 创建 SXSSFWorkbook 并将所有 Sheet 数据写入
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| | | *
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| | | * @param sheets Sheet 描述列表
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| | | * @return 已写入所有 Sheet 数据的 SXSSFWorkbook
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| | | */
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| | | @SuppressWarnings({ "rawtypes", "unchecked" })
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| | | private static SXSSFWorkbook buildWorkbook(List<ExcelSheet<?>> sheets)
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| | | {
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| | | SXSSFWorkbook wb = new SXSSFWorkbook(500);
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| | | for (ExcelSheet<?> excelSheet : sheets)
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| | | {
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| | | ExcelUtil util = new ExcelUtil(excelSheet.getClazz());
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| | | util.initWithWorkbook(wb, excelSheet.getList(), excelSheet.getSheetName(), excelSheet.getTitle());
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| | | util.writeSheet();
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| | | }
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| | | return wb;
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| | | }
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| | |
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| | | /**
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| | | * 使用外部传入的 Workbook 初始化(多 Sheet 导出专用)
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| | | * 与 init() 的区别:不新建 Workbook,而是在已有 wb 上追加新 Sheet
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| | | *
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| | | * @param wb 已有工作簿
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| | | * @param list 数据集合
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| | | * @param sheetName Sheet 名称
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| | | * @param title 大标题(可为空)
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| | | */
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| | | public void initWithWorkbook(SXSSFWorkbook wb, List<T> list, String sheetName, String title)
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| | | {
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| | | if (list == null)
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| | | {
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| | | list = new ArrayList<T>();
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| | | }
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| | | this.list = list;
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| | | this.sheetName = sheetName;
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| | | this.title = title != null ? title : "";
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| | | this.type = Type.EXPORT;
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| | | this.rownum = 0;
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| | | this.wb = wb;
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| | | this.sheet = wb.createSheet(sheetName);
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| | | createExcelField();
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| | | this.styles = createStyles(wb);
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| | | createTitle();
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| | | createSubHead();
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| | | }
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| | |
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| | | /**
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| | |
| | | /**
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| | | * 添加单元格
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| | | */
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| | | @SuppressWarnings("deprecation")
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| | | public Cell addCell(Excel attr, Row row, T vo, Field field, int column)
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| | | {
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| | | Cell cell = null;
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| | |
| | | String separator = attr.separator();
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| | | if (StringUtils.isNotEmpty(dateFormat) && StringUtils.isNotNull(value))
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| | | {
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| | | cell.getCellStyle().setDataFormat(this.wb.getCreationHelper().createDataFormat().getFormat(dateFormat));
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| | | cell.setCellStyle(createCellStyle(cell.getCellStyle(), dateFormat));
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| | | cell.setCellValue(parseDateToStr(dateFormat, value));
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| | | }
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| | | else if (StringUtils.isNotEmpty(readConverterExp) && StringUtils.isNotNull(value))
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| | |
| | | log.error("导出Excel失败{}", e);
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| | | }
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| | | return cell;
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| | | }
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| | |
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| | | /**
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| | | * 使用自定义格式,同时避免样式污染
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| | | * |
| | | * @param cellStyle 从此样式复制
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| | | * @param format 格式匹配的字符串
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| | | * @return 格式化后CellStyle对象
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| | | */
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| | | private CellStyle createCellStyle(CellStyle cellStyle, String format)
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| | | {
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| | | String key = cellStyle.getIndex() + "|" + format;
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| | | CellStyle cached = cellStyleCache.get(key);
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| | | if (cached != null)
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| | | {
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| | | return cached;
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| | | }
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| | | CellStyle style = wb.createCellStyle();
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| | | style.cloneStyleFrom(cellStyle);
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| | | style.setDataFormat(wb.getCreationHelper().createDataFormat().getFormat(format));
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| | | cellStyleCache.put(key, style);
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| | | return style;
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| | | }
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| | |
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| | | /**
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| | |
| | | {
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| | | try
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| | | {
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| | | Object instance = excel.handler().newInstance();
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| | | Object instance = excel.handler().getDeclaredConstructor().newInstance();
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| | | Method formatMethod = excel.handler().getMethod("format", new Class[] { Object.class, String[].class, Cell.class, Workbook.class });
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| | | value = formatMethod.invoke(instance, value, excel.args(), cell, this.wb);
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| | | }
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