请看excel分类,其他的博客,下面的博客写的比较早,没啥太大利用价值,纯粹是复制代码

springMVC，

但是，原理应该是一样的，直接贴代码。

因为最近要写一个excel上传数据的，所以，先把下载excel的代码贴上来。

@SuppressWarnings({ "unchecked", "rawtypes" })@RequestMapping(value = "/form/downs/downloadExcel")public ResponseEntity<byte[]> downloadExcelCopy(PProductForm form) throws Exception {byte[] data = null;HttpHeaders header = new HttpHeaders();try {Map<String, Object> condition = new HashMap<>();Map<String, Object> accountInfo = (HashMap) this.request.getSession().getAttribute("pt_accountInfo");String employeeId = (String) accountInfo.get("employeeId");if (Strings.isNullOrEmpty(employeeId)) {} else {List<String> proids = new ArrayList<>();for (String taskId : form.getSubIds().split(",")) {proids.add(taskId);}System.out.println("*************************IDS是："+form.getSubIds());WritableWorkbook workbook;String absolutePath = Param.getParam("ebmep.root.path").get("dir").replace("-", ":");String folder = Param.getParam("download.directory.config").get("product");Properties props = new Properties();InputStream in = this.getClass().getResourceAsStream("/product_custom_code.properties");props.load(in);String fileName = props.getProperty("excel_tsjbdc_name");String path = folder + File.separator + fileName;FileUtil.newFolder(absolutePath + folder);File file = new File(absolutePath + path);workbook = jxl.Workbook.createWorkbook(file);WritableSheet sheet = workbook.createSheet(fileName, 0);String[] title = {UploadConstants.PRO_EXPORT_ORDER,//序号 0UploadConstants.PRO_EXPORT_TIT,//图书名称1UploadConstants.PRO_EXPORT_THDH,//是否中国标准书号2UploadConstants.PRO_EXPORT_THWLDH,//CIP分类号3UploadConstants.PRO_EXPORT_ISBN,//ISBN编码4UploadConstants.PRO_EXPORT_THDZ,//新出或重印或租型5UploadConstants.PRO_EXPORT_ZS,//字数（千字）6UploadConstants.PRO_EXPORT_SFTS,//是否套书7UploadConstants.PRO_EXPORT_BCYSC,//本次印数（册）8UploadConstants.PRO_EXPORT_MCDJ,//每册、张定价（元）9UploadConstants.PRO_EXPORT_MCYZ,//每册、张印张（印张）10UploadConstants.PRO_EXPORT_FZB,//分装部（卷张册）11UploadConstants.PRO_EXPORT_BCYST,//本次印数（套）12UploadConstants.PRO_EXPORT_MTDJ,//每套定价（元）13UploadConstants.PRO_EXPORT_MTYZ,//每套印张（印张）14UploadConstants.PRO_EXPORT_DJZJE,//定价总金额（元）15UploadConstants.PRO_EXPORT_CYGG,//常用规格16UploadConstants.PRO_EXPORT_ZDY,//自定义17UploadConstants.PRO_EXPORT_BCZYZ,//本次总印张（千印张）18UploadConstants.PRO_EXPORT_BOOK,//是否课本19UploadConstants.PRO_EXPORT_SFJF,//是否教辅读物20UploadConstants.PRO_EXPORT_SFSE,//是否少儿读物21UploadConstants.PRO_EXPORT_SFGJ,//是否古籍整理图书22UploadConstants.PRO_EXPORT_TRAN,//是否翻译图书23UploadConstants.PRO_EXPORT_SIZE,//开本24UploadConstants.PRO_EXPORT_LANG,//文种（字）25UploadConstants.PRO_EXPORT_PACO,//页码26UploadConstants.PRO_EXPORT_FIA,//著（编、绘）译者27UploadConstants.PRO_EXPORT_REM,//备注28};for (int i = 0; i < title.length; i++) {sheet.addCell(new Label(i, 0, title[i]));}int line = 1;for (String proId : proids) {PProduct product = this.productService.getProduct(proId);condition.clear();condition.put("productId", product.getId());List<PProductStylebook> productPropList = this.productStylebookService.getProductPropList(condition, null);Map<String, Object> productStylebookMap = new HashMap<>();for (PProductStylebook pProductStylebook : productPropList) {productStylebookMap.put(pProductStylebook.getSubjectCode(), pProductStylebook.getBookPage());}if (product != null && productPropList.size() > 0) {/*******************************************************************************************///序号0sheet.addCell(new Label(0, line, Integer.toString(line)));//图书名称1if (product.getTitle() != null) {sheet.addCell(new Label(1, line, product.getTitle()));} else {sheet.addCell(new Label(1, line, ""));}//是否中国标准书号2sheet.addCell(new Label(2, line, ""));//CIP分类号3if (productPropList.get(0).getSubjectCode() != null) {sheet.addCell(new Label(3, line, productPropList.get(0).getSubjectCode()));} else {sheet.addCell(new Label(3, line, ""));}//ISBN编码4if (product.getIsbn() != null) {sheet.addCell(new Label(4, line, product.getIsbn()));} else {sheet.addCell(new Label(4, line, ""));}//新出或重印或租型5if (productPropList.get(0).getBookRent() != null) {//2c9080904c53df44014c540fce60001dif(this.dicClassService.getDic(productPropList.get(0).getBookRent()) != null){sheet.addCell(new Label(5, line, this.dicClassService.getDic(productPropList.get(0).getBookRent()).getName()));}else{sheet.addCell(new Label(5, line, productPropList.get(0).getBookRent()));}} else {sheet.addCell(new Label(5, line, ""));}//sheet.addCell(new Label(, line, "新出或重印或租型"));   bookRent//字数（千字）6if (productPropList.get(0).getPageNum() != null) {sheet.addCell(new Label(6, line, Integer.toString(productPropList.get(0).getPageNum())));} else {sheet.addCell(new Label(6, line, ""));}//套书7if (productPropList.get(0).getBooksFlg() != null) {if(this.dicClassService.getDic(productPropList.get(0).getBooksFlg())!=null ){sheet.addCell(new Label(7, line, this.dicClassService.getDic(productPropList.get(0).getBooksFlg()).getName()));}else{sheet.addCell(new Label(7, line, productPropList.get(0).getBooksFlg()));}} else {sheet.addCell(new Label(7, line, ""));}//本次印数（册）8sheet.addCell(new Label(8, line, ""));//每册、张定价（元）9if (product.getPrice() != null) {sheet.addCell(new Label(9, line, String.valueOf(product.getPrice())));} else {sheet.addCell(new Label(9, line, ""));}//sheet.addCell(new Label(, line, "每册、张定价（元）"));  //每册、张印张（印张）10sheet.addCell(new Label(10, line, ""));//分装部（卷张册）11sheet.addCell(new Label(11, line, ""));//本次印数（套）12sheet.addCell(new Label(12, line, ""));//每套定价（元）13sheet.addCell(new Label(13, line, ""));//每套印张（印张）14sheet.addCell(new Label(14, line, ""));//定价总金额（元）15if (product.getPrice() != null) {sheet.addCell(new Label(15, line, String.valueOf(product.getPrice())));} else {sheet.addCell(new Label(15, line, ""));}//sheet.addCell(new Label(15, line, "定价总金额（元）")); getPrice//常用规格16   pageSpecif (productPropList.get(0).getPageSpec() != null) {sheet.addCell(new Label(16, line, productPropList.get(0).getPageSpec()));} else {sheet.addCell(new Label(16, line, ""));}//自定义17sheet.addCell(new Label(17, line, ""));//本次总印张（千印张）18if (product.getTotalNum() != null) {sheet.addCell(new Label(18, line, Integer.toString(product.getTotalNum())));} else {sheet.addCell(new Label(18, line, ""));}//是否课本19if (productPropList.get(0).getBook() != null) {if(this.dicClassService.getDic(productPropList.get(0).getBook())!=null){sheet.addCell(new Label(19, line,this.dicClassService.getDic(productPropList.get(0).getBook()).getName() ));}else{sheet.addCell(new Label(19, line,productPropList.get(0).getBook()));}} else {sheet.addCell(new Label(19, line, ""));}//是否教辅读物20sheet.addCell(new Label(20, line, ""));//是否少儿读物21if (productPropList.get(0).getChildBook() != null) {if(this.dicClassService.getDic(productPropList.get(0).getChildBook())!=null){sheet.addCell(new Label(21, line, this.dicClassService.getDic(productPropList.get(0).getChildBook()).getName()));}else{sheet.addCell(new Label(21, line, productPropList.get(0).getChildBook()));    }} else {sheet.addCell(new Label(21, line, ""));}//是否古籍整理图书22sheet.addCell(new Label(22, line, ""));//是否翻译图书23if (productPropList.get(0).getTranslateBook() != null) {if(this.dicClassService.getDic(productPropList.get(0).getTranslateBook())!=null){sheet.addCell(new Label(23, line,this.dicClassService.getDic(productPropList.get(0).getTranslateBook()).getName() ));  }else{sheet.addCell(new Label(23, line,productPropList.get(0).getTranslateBook()  ));}} else {sheet.addCell(new Label(23, line, ""));}//开本24if (product.getSize() != null) {sheet.addCell(new Label(24, line, product.getSize()));} else {sheet.addCell(new Label(24, line, ""));}//文种（字）25if (productPropList.get(0).getLanguage() != null) {if(this.dicClassService.getDic(productPropList.get(0).getLanguage())!=null){sheet.addCell(new Label(25, line, this.dicClassService.getDic(productPropList.get(0).getLanguage()).getName()));}else{sheet.addCell(new Label(25, line, productPropList.get(0).getLanguage()));  }} else {sheet.addCell(new Label(25, line, ""));}//页码26if (productPropList.get(0).getPageCount() != null) {sheet.addCell(new Label(26, line, Integer.toString(productPropList.get(0).getPageCount())));} else {sheet.addCell(new Label(26, line, ""));}//著（编、绘）译者27if (product.getFirstAuthor() != null) {sheet.addCell(new Label(27, line, product.getFirstAuthor()));} else {sheet.addCell(new Label(27, line, ""));}//备注28if ( productPropList.get(0).getRemark()!= null) {sheet.addCell(new Label(28, line, productPropList.get(0).getRemark()));} else {sheet.addCell(new Label(28, line, ""));}line++;}else{/*******************************************************************************************///序号0sheet.addCell(new Label(0, line, Integer.toString(line)));//图书名称1if (product.getTitle() != null) {sheet.addCell(new Label(1, line, product.getTitle()));} else {sheet.addCell(new Label(1, line, ""));}//是否中国标准书号2sheet.addCell(new Label(2, line, ""));//CIP分类号3sheet.addCell(new Label(3, line, ""));//ISBN编码4if (product.getIsbn() != null) {sheet.addCell(new Label(4, line, product.getIsbn()));} else {sheet.addCell(new Label(4, line, ""));}//新出或重印或租型5sheet.addCell(new Label(5, line, ""));//字数（千字）6sheet.addCell(new Label(6, line, ""));//套书7sheet.addCell(new Label(7, line, ""));//本次印数（册）8sheet.addCell(new Label(8, line, ""));//每册、张定价（元）9if (product.getPrice() != null) {sheet.addCell(new Label(9, line, String.valueOf(product.getPrice())));} else {sheet.addCell(new Label(9, line, ""));}//sheet.addCell(new Label(, line, "每册、张定价（元）"));  //每册、张印张（印张）10sheet.addCell(new Label(10, line, ""));//分装部（卷张册）11sheet.addCell(new Label(11, line, ""));//本次印数（套）12sheet.addCell(new Label(12, line, ""));//每套定价（元）13sheet.addCell(new Label(13, line, ""));//每套印张（印张）14sheet.addCell(new Label(14, line, ""));//定价总金额（元）15if (product.getPrice() != null) {sheet.addCell(new Label(15, line, String.valueOf(product.getPrice())));} else {sheet.addCell(new Label(15, line, ""));}//常用规格16   pageSpecsheet.addCell(new Label(16, line, ""));//自定义17sheet.addCell(new Label(17, line, ""));//本次总印张（千印张）18if (product.getTotalNum() != null) {sheet.addCell(new Label(18, line, Integer.toString(product.getTotalNum())));} else {sheet.addCell(new Label(18, line, ""));}//是否课本19sheet.addCell(new Label(19, line, ""));//是否教辅读物20sheet.addCell(new Label(20, line, ""));//是否少儿读物21sheet.addCell(new Label(21, line, ""));//是否古籍整理图书22sheet.addCell(new Label(22, line, ""));//是否翻译图书23sheet.addCell(new Label(23, line, ""));//开本24if (product.getSize() != null) {sheet.addCell(new Label(24, line, product.getSize()));} else {sheet.addCell(new Label(24, line, ""));}//文种（字）25sheet.addCell(new Label(25, line, ""));//页码26sheet.addCell(new Label(26, line, ""));//著（编、绘）译者27if (product.getFirstAuthor() != null) {sheet.addCell(new Label(27, line, product.getFirstAuthor()));} else {sheet.addCell(new Label(27, line, ""));}//备注28sheet.addCell(new Label(28, line, ""));line++;}}workbook.write();workbook.close();//下载header.setContentType(MediaType.parseMediaType("application/x-msdownload"));header.set("Content-Disposition", "attachment; filename=" + new String(fileName.getBytes("utf-8"), "ISO8859-1"));data = FileUtils.readFileToByteArray(new File(absolutePath + path));}} catch (Exception e) {e.printStackTrace();}return new ResponseEntity<byte[]>(data, header, HttpStatus.OK);}

先贴代码，过几天再写代码注释，讲解，啥啥的。