EasyExcel動態匯出資料
阿新 • • 發佈：2020-08-29
頭的資料格式設定為 List<List<String>> 並且具體的資料格式也設定為List<List<String>>具體的資料和表頭一一對應
public <T> void exportTerminalnew(ExportHandlerDS handler, List<String> excelHeaders, String staffCode, FastFileStorageClient fastFileClient, String fdfsUrl, IReportService reportExportDetailService, Long id) { ......//根據前端選擇的欄位生成表頭 List<List<String>> head = head(excelHeaders); WriteSheet writeSheet = EasyExcel.writerSheet().head(head). //設定樣式 registerWriteHandler(setExcelStyle()). //自定義列寬 registerWriteHandler(new Custemhandler()).//registerWriteHandler(new LongestMatchColumnWidthStyleStrategy()). //固定表頭 registerWriteHandler(new CustomSheetWriteHandler()). //動態合併單元格 registerWriteHandler(new ExcelCellMergeStrategy()). build(); //設定列寬？// writeSheet.setColumnWidthMap(); ExcelWriter excelWriter = EasyExcel.write(baos).excelType(ExcelTypeEnum.XLSX).build(); WriteTable build = EasyExcel.writerTable(0).needHead(false).build(); ..... //根據傳入的欄位篩選匯出哪些資料 List<List<String>> body = getBody(list, excelHeaders); excelWriter.write(body,writeSheet,build); excelWriter.finish(); StorePath storePath=null; if(!selImage){ final ByteArrayInputStream byteIs = new ByteArrayInputStream(baos.toByteArray()); //生成的檔案上傳到fast DFS系統上 storePath = fastFileClient.uploadFile(byteIs, byteIs.available(), ExcelTypeEnum.XLSX.getValue().substring(1), null); }else { StringBuilder fileNewPath=new StringBuilder(); final ByteArrayInputStream byteIs = new ByteArrayInputStream(getFile(baos,fileNewPath,list,staffCode)); //生成的檔案上傳到fast DFS系統上 storePath = fastFileClient.uploadFile(byteIs, byteIs.available(), "zip", null); // 刪除資料夾及檔案 path.add(fileNewPath.toString()); } String fullPath = storePath.getFullPath(); filePath = fdfsUrl + "/" + fullPath; // 1: 執行成功 -1: 執行失敗 if (StringUtils.isNotBlank(fullPath)) { reportExportDetailDTO.setStatus(1); reportExportDetailDTO.setFilePath(filePath); } else { reportExportDetailDTO.setStatus(-1); } } catch (Exception e) { reportExportDetailDTO.setStatus(-1); log.error("匯出Excel報表檔案出錯",e); } finally { if(CollectionUtils.isNotEmpty(path)){ //刪除檔案 delFile(path); log.error("要刪除的目錄地址："+path); } reportExportDetailDTO.setId(id); reportExportDetailService.updateExport(reportExportDetailDTO); } }
** * 設定excel樣式 * @return */ private HorizontalCellStyleStrategy setExcelStyle(){ // 表頭策略 WriteCellStyle headWriteCellStyle = new WriteCellStyle(); WriteFont writeFont=new WriteFont(); writeFont.setFontName("宋體"); writeFont.setFontHeightInPoints((short) 11); //加粗 writeFont.setBold(true); headWriteCellStyle.setWriteFont(writeFont); //內容樣式策略 WriteCellStyle contextWriteeCellStyle=new WriteCellStyle(); //設定水平居中 contextWriteeCellStyle.setHorizontalAlignment(HorizontalAlignment.CENTER); // 這個策略是 頭是頭的樣式 內容是內容的樣式 其他的策略可以自己實現 HorizontalCellStyleStrategy horizontalCellStyleStrategy = new HorizontalCellStyleStrategy(headWriteCellStyle,contextWriteeCellStyle); return horizontalCellStyleStrategy; }
/**
easyexcel提供的自動列寬不能滿足需求，只能自己根據業務要求重寫
* @description: EasyExcel設定列寬 * @author: qiuqingxin * @create: 2020-08-07 15:49 **/ public class Custemhandler extends AbstractColumnWidthStyleStrategy { private static final int MAX_COLUMN_WIDTH = 50; public Custemhandler() { } @Override protected void setColumnWidth(WriteSheetHolder writeSheetHolder, List<CellData> cellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) { int columnWidth=20; if (isHead ) { if (cell.getStringCellValue().equals("照片型別")){ columnWidth=20; } if (cell.getStringCellValue().equals("當前位置")){ columnWidth=50; } if (cell.getStringCellValue().equals("備註")){ columnWidth=30; } ...... writeSheetHolder.getSheet().setColumnWidth(cell.getColumnIndex(), columnWidth * 256); } } }
/** * @description: easyExcel攔截器 * @author: qiuqingxin * @create: 2020-06-16 11:29 **/ public class CustomSheetWriteHandler implements SheetWriteHandler { @Override public void beforeSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) { } @Override public void afterSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) { //固定表頭 writeSheetHolder.getSheet().createFreezePane(0,1,0,1); } } /** * @description: 自定義合併單元格 * @author: qiuqingxin * @create: 2020-08-07 16:38 **/ public class ExcelCellMergeStrategy implements CellWriteHandler { private int fileColumnIndex = -1; private int imageColumnIndex = -1; private String regEx="[^0-9]"; @Override public void beforeCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row, Head head, Integer columnIndex, Integer relativeRowIndex, Boolean isHead) { } @Override public void afterCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) { } /** 每在excel中寫入一個單元格資料都會呼叫次方法 **/ @Override public void afterCellDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, List<CellData> cellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) { if (isHead) { if ("附件".equals(cell.getStringCellValue())) { fileColumnIndex = cell.getColumnIndex(); return; } if ("現場照片".equals(cell.getStringCellValue())) { imageColumnIndex = cell.getColumnIndex(); return; } } else { if (imageColumnIndex != -1) { //找到附件所在的列 if (cell.getColumnIndex() == imageColumnIndex + 1) { // Sheet sheet = writeSheetHolder.getSheet(); Row row = cell.getRow(); Cell cell1 = row.getCell(imageColumnIndex); Cell cell2 = row.getCell(imageColumnIndex + 1); String imageUrl = cell2.getStringCellValue(); String imageName = cell1.getStringCellValue(); if (!isZero(imageName)) { cell1.setCellFormula( "HYPERLINK(\"" + imageUrl + "\",\"" + imageName + "\")"); }else { cell1.setCellValue(""); } row.removeCell(cell2); } } if (fileColumnIndex != -1) { if (null == cell.getRow().getCell(fileColumnIndex)) { //找到附件所在的列 if (cell.getColumnIndex() == fileColumnIndex + 2) { // Sheet sheet = writeSheetHolder.getSheet(); Row row = cell.getRow(); Cell cell3 = row.createCell(fileColumnIndex); Cell cell1 = row.getCell(fileColumnIndex + 1); Cell cell2 = row.getCell(fileColumnIndex + 2); String fileUrl = cell2.getStringCellValue(); cell3.setCellFormula("HYPERLINK(\"" + fileUrl + "\",\"" + cell1.getStringCellValue() + "\")"); row.removeCell(cell1); row.removeCell(cell2); } } else { if (cell.getColumnIndex() == fileColumnIndex + 1) { // Sheet sheet = writeSheetHolder.getSheet(); Row row = cell.getRow(); Cell cell1 = row.getCell(fileColumnIndex ); Cell cell2 = row.getCell(fileColumnIndex + 1); String fileUrl = cell2.getStringCellValue(); cell1.setCellFormula("HYPERLINK(\"" + fileUrl + "\",\"" + cell1.getStringCellValue() + "\")"); row.removeCell(cell2); } } } } } private boolean isZero(String value){ Pattern p = Pattern.compile(regEx); Matcher m = p.matcher(value); String trim = m.replaceAll("").trim(); return trim.equals("0")?true:false; } } private List<List<String>> getBody(List<DsTerminalUploadExcel> list3,List<String> excelHeaders )throws Exception{ Map<Integer,String> map=new HashMap<>(); List<List<String>> lists=new ArrayList<>(); Integer index=1; for (String excelHeader : excelHeaders) { map.put(index++,excelHeader); } int size = map.size(); for (DsTerminalUploadExcel dsTerminalUploadExcel : list3) { List<String> data=new ArrayList<>(); for (int i =0;i<size;i++){ if (map.get(i+1).equals("image")){ String value2=dsTerminalUploadExcel.getImagePaths()!=null?dsTerminalUploadExcel.getImagePaths().size()+"張)":"0張)"; value2="點選檢視圖片("+value2; data.add(value2); value2=null==dsTerminalUploadExcel.getStaffName()? "/"+dsTerminalUploadExcel.getReportDate().substring(0,10)+"_"+dsTerminalUploadExcel.getId(): "/"+dsTerminalUploadExcel.getStaffName()+"_"+dsTerminalUploadExcel.getReportDate().substring(0,10)+"_"+dsTerminalUploadExcel.getId(); value2="images/"+value2; data.add(value2); }else { String value=(String)getValue(dsTerminalUploadExcel,map.get(i+1)); data.add(value); if (map.get(i+1).equals("fileName")){ String value2=(String)getValue(dsTerminalUploadExcel,"filePath"); data.add(value2); } } } lists.add(data); } return lists; } //反射呼叫get方法 public static Object getValue(Object dto,String name) throws Exception { String s = name.substring(0, 1).toUpperCase(); String substring = name.substring(1); Method method = dto.getClass().getMethod("get" + s + substring); return method.invoke(dto); } //將資料生成位元組陣列 private byte[] getFile(ByteArrayOutputStream baos,StringBuilder fileNewPath,List<DsTerminalUploadExcel> list3, String staffCode) throws Exception { // String path = "D:\\sss\\"+staffCode+"_"+(new SimpleDateFormat("yyMMddHHmmss").format(new Date()))+"\\"; String path = "/data/file/"+staffCode+"_"+(new SimpleDateFormat("yyMMddHHmmss").format(new Date()))+"/"; log.error("獲取的路徑:"+path); String fileName="終端拍照上傳"+System.currentTimeMillis(); String filePath=path+fileName; fileNewPath.append(path); File file = new File(filePath); if (!file.exists()){ file.mkdirs(); } FileOutputStream fileOutputStream=new FileOutputStream(filePath+"/終端拍照上傳"+System.currentTimeMillis()+ExcelTypeEnum.XLSX.getValue()); fileOutputStream.write(baos.toByteArray()); fileOutputStream.close(); genImages(list3,filePath); log.error("filePath"+filePath);
return setZip(filePath,path,fileName); } private void genImages(List<DsTerminalUploadExcel> list3,String filePath) throws Exception { File file = new File(filePath + "/images"); if (!file.exists()){ file.mkdirs(); } for (DsTerminalUploadExcel dsTerminalUploadExcel : list3) { List<String> imagePaths = dsTerminalUploadExcel.getImagePaths(); if (null==imagePaths||imagePaths.size()==0){ continue; } String imagepath=null==dsTerminalUploadExcel.getStaffName()? "/"+dsTerminalUploadExcel.getReportDate().substring(0,10)+"_"+dsTerminalUploadExcel.getId(): "/"+dsTerminalUploadExcel.getStaffName()+"_"+dsTerminalUploadExcel.getReportDate().substring(0,10)+"_"+dsTerminalUploadExcel.getId(); imagepath=file.getPath()+imagepath; File file1 = new File(imagepath); if (!file1.exists()) file1.mkdirs(); for (String imagePath : imagePaths) { String ext = imagePath.substring(imagePath.lastIndexOf("/") + 1); File file2 = new File(file1.getPath() + "/" + ext); FileOutputStream fileOutputStream = new FileOutputStream(file2); BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(fileOutputStream); //傳送HTTP請求並指定返回的資料為byte陣列 RestTemplate restTemplate = new RestTemplate(); byte[] forObject = restTemplate.getForObject(imagePath, byte[].class); bufferedOutputStream.write(forObject); bufferedOutputStream.flush(); fileOutputStream.close(); bufferedOutputStream.close(); } } }
private byte[] setZip(String allPath, String path, String fileName) throws Exception {
String newzipPath = path + fileName + ".zip";
File file = new File(newzipPath);
FileOutputStream fileOutputStream = new FileOutputStream(file);
//壓縮工具類
byte[] aByte = ZipUtils.getByte(allPath, fileOutputStream, true, file);
fileOutputStream.close();
return aByte;
}