java实现Excel的导入、导出
2015-11-26 16:20
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一、Excel的导入
导入可采用两种方式,一种是JXL,另一种是POI,但前者不能读取高版本的Excel(07以上),后者更具兼容性。由于对两种方式都进行了尝试,就都贴出来分享(若有错误,请给予指正) 方式一、JXL导入 所需jar包 JXL.jarpublicstaticList<PutStorageInfo> readExcelByJXL(String filePath){ List<PutStorageInfo> infoList =newArrayList<PutStorageInfo>(); Map<String,List<String>> map =newHashMap<String,List<String>>(); infoList.clear(); try{ InputStream is =newFileInputStream(filePath); Workbook workbook =Workbook.getWorkbook(is); //获取第1张表 Sheet sheet = workbook.getSheet(0); //获取总的列数 int columns = sheet.getColumns(); //获取总的行数 int rows = sheet.getRows(); //先列后行(j,i) for(int i =1; i < rows; i++){ List<String> contentList =newArrayList<String>(); contentList.clear(); for(int j =1; j < columns; j++){ contentList.add(sheet.getCell(j,i).getContents()); } map.put("StorageInfo"+i, contentList); } //遍历map集合,封装成bean for(Map.Entry<String,List<String>> entry : map.entrySet()){ List<String> list = entry.getValue(); PutStorageInfo storageInfo =newPutStorageInfo(); storageInfo.setProductcode(list.get(0)); storageInfo.setProductsort(list.get(1)); storageInfo.setProductbrand(list.get(2)); storageInfo.setProductname(list.get(3)); storageInfo.setProductquantity(list.get(4)); storageInfo.setProductcontent(list.get(5)); storageInfo.setProductnetweight(list.get(6)); storageInfo.setProductcountry(list.get(7)); storageInfo.setProductpdate(list.get(8)); storageInfo.setProductprice(list.get(9)); storageInfo.setProductmark(list.get(10)); infoList.add(storageInfo); } is.close(); }catch(Exception e){ e.printStackTrace(); } return infoList; }
方式二、POI导入
所需jar包 poi-3.6-20091214.jar poi-ooxml-3.6-20091214.jar poi-ooxml-schemas-3.6-20091214.jar xmlbeans-2.3.0.jar dom4j-1.6.1.jar jdom-2.0.6.jar-
publicstaticList<PutStorageInfo> readExcelByPOI(String filePath){ List<PutStorageInfo> infoList =newArrayList<PutStorageInfo>(); Map<String,List<String>> map =newHashMap<String,List<String>>(); infoList.clear(); try{ InputStream is =newFileInputStream(filePath); int index = filePath.lastIndexOf("."); String postfix = filePath.substring(index+1); Workbook workbook =null; if("xls".equals(postfix)){ workbook =newHSSFWorkbook(is); }elseif("xlsx".equals(postfix)){ workbook =newXSSFWorkbook(is); } //获取第1张表 Sheet sheet = workbook.getSheetAt(0); //总的行数 int rows = sheet.getLastRowNum(); //总的列数--->最后一列为null则有问题,读取不完整,将表头的数目作为总的列数,没有的则补为null int columns = sheet.getRow(0).getLastCellNum(); //先列后行 for(int i =1; i <= rows; i++){ Row row = sheet.getRow(i); if(null!= row && row.getFirstCellNum()==-1){//这一行是空行,不读取 continue; } //这一行的总列数 // columns = row.getLastCellNum(); List<String> contentList =newArrayList<String>(); contentList.clear(); for(int j =1; j < columns; j++){ if(row.getCell(j)!=null){ row.getCell(j).setCellType(Cell.CELL_TYPE_STRING); contentList.add(row.getCell(j).getStringCellValue()); }else{ contentList.add(""); } } map.put("StorageInfo"+i, contentList); } //遍历map集合,封装成bean for(Map.Entry<String,List<String>> entry : map.entrySet()){ List<String> list = entry.getValue(); PutStorageInfo storageInfo =newPutStorageInfo(); storageInfo.setProductcode(list.get(0)); storageInfo.setProductsort(list.get(1)); storageInfo.setProductbrand(list.get(2)); storageInfo.setProductname(list.get(3)); storageInfo.setProductquantity(list.get(4)); storageInfo.setProductcontent(list.get(5)); storageInfo.setProductnetweight(list.get(6)); storageInfo.setProductcountry(list.get(7)); storageInfo.setProductpdate(list.get(8)); storageInfo.setProductprice(list.get(9)); storageInfo.setProductmark(list.get(10)); infoList.add(storageInfo); } is.close(); }catch(Exception e){ e.printStackTrace(); } return infoList; }
publicstaticvoid creatExcel(List<PutStorageInfo> storageInfoList,String fileName){ try{ OutputStream os =newFileOutputStream(fileName); //创建可写的工作薄 WritableWorkbook workbook =Workbook.createWorkbook(os); //创建第一张表 WritableSheet sheet = workbook.createSheet("Sheet1",0); //设置根据内容自动宽度 CellView cellView =newCellView(); cellView.setAutosize(true); //在下边for循环中为每一列设置 //设置列宽度,此种方式参数的意思,i-->对应的行或列 j-->要设置的宽度 // sheet.setColumnView(0, 100); // sheet.setRowView(0, 300); //设置字体加粗且背景颜色为黄色 WritableFont boldFont =newWritableFont(WritableFont.ARIAL,10,WritableFont.BOLD);//黑体 WritableCellFormat cellrFormate =newWritableCellFormat(boldFont); cellrFormate.setBackground(Colour.YELLOW); //先添加表头 List<String> titleList = getTitleList(); //循环创建单元格,先列后行 for(int i =0; i < titleList.size(); i++){ //sheet.setColumnView(i, cellView); sheet.setColumnView(i,20); Label label =newLabel(i,0, titleList.get(i), cellrFormate); sheet.addCell(label); } LogUtil.logOut(JXLWriteExcel.class,storageInfoList.size()+""); String[][] content = convertToArr(storageInfoList); //设置content的自适应当前列的宽度,文本太对会自动换行 new Label(j, i+1, content[i][j-1],contentFormat); WritableCellFormat contentFormat =newWritableCellFormat(); contentFormat.setWrap(true); //然后添加入库信息条目 for(int i =0; i < storageInfoList.size(); i++){ Label labelID =newLabel(0,i+1,(i+1)+""); sheet.addCell(labelID); for(int j =1; j < titleList.size(); j++){ Label label =newLabel(j, i+1, content[i][j-1]); sheet.addCell(label); } } //把创建的内容写入到输出流中,并关闭输出流 workbook.write(); workbook.close(); os.close(); //将存储了入库bean的list清空 storageInfoList.clear(); }catch(Exception e){ e.printStackTrace(); } } privatestaticString[][] convertToArr(List<PutStorageInfo> storageInfoList){ String[][] content =newString[storageInfoList.size()][11]; for(int i =0; i < storageInfoList.size(); i++){ PutStorageInfo info = storageInfoList.get(i); //每个bean中总项有11项 content[i][0]= info.getProductcode(); content[i][1]= info.getProductsort(); content[i][2]= info.getProductbrand(); content[i][3]= info.getProductname(); content[i][4]= info.getProductquantity(); content[i][5]= info.getProductcontent(); content[i][6]= info.getProductnetweight(); content[i][7]= info.getProductcountry(); content[i][8]= info.getProductpdate(); content[i][9]= info.getProductprice(); content[i][10]= info.getProductmark(); } return content; } privatestaticList<String> getTitleList(){ List<String> list =newArrayList<String>(); list.add("Item No."); list.add("Product code"); list.add("Sort"); list.add("Brand"); list.add("Product Name"); list.add("Quantity(Pieces)"); list.add("Content"); list.add("Net Weight"); list.add("Country"); list.add("Best before date"); list.add("Price(EURO)"); list.add("Remarks"); return list; }
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