Java后端实现Excel导出，及添加Excel文件标题样式

简单Java实现Excel文件导出

Java导出要在action层（controller层）中操作
需要到的jar包：

后端代码：
后面两个函数都是设置Excel文件里的标题样式，专注第一个方法就可以了

/*** 导出房产信息* @param fcHouseProMain* @param request* @param response* @param redirectAttributes* @return*/@RequiresPermissions("housepro:fcHouseProMain:view")@RequestMapping(value = "export", method=RequestMethod.POST)public String exportFile(FcHouseProMain fcHouseProMain, HttpServletRequest request, HttpServletResponse response, RedirectAttributes redirectAttributes) {try {String fileName = "房产信息"+DateUtils.getDate("yyyyMMddHHmmss")+".xlsx";/*List<FcHouseProMain> list = fcHouseProMainService.findList(fcHouseProMain);new ExportExcel("房产信息", FcHouseProMain.class).setDataList(list).write(response, fileName).dispose();*/SXSSFWorkbook wb = new SXSSFWorkbook(500);Sheet sheet = wb.createSheet("Export");Map<String, CellStyle> styles = createStyles(wb);String str[] = {"ID","名称"};initialize("房产信息",Arrays.asList(str),wb,sheet,styles);for (int i = 0; i <2; i++) {Row row = sheet.createRow(rownum++);Cell ce1 = row.createCell(0);ce1.setCellValue("100"+(i+1));Cell ce2 = row.createCell(1);ce2.setCellValue("张三"+(i+1));}OutputStream out = response.getOutputStream();response.reset();response.setContentType("application/octet-stream; charset=utf-8");response.setHeader("Content-Disposition", "attachment; filename="+Encodes.urlEncode(fileName));wb.write(out);wb.dispose();out.flush();out.close();return null;} catch (Exception e) {addMessage(redirectAttributes, "导出房产信息失败！失败信息："+e.getMessage());}return "redirect:"+Global.getAdminPath()+"/housepro/fcHouseProMain/?repage";}/*** 当前行号*/private int rownum;private void initialize(String title, List<String> headerList,SXSSFWorkbook wb,Sheet sheet,Map<String, CellStyle> styles) {// Create titleif (StringUtils.isNotBlank(title)){Row titleRow = sheet.createRow(rownum++);titleRow.setHeightInPoints(30);Cell titleCell = titleRow.createCell(0);titleCell.setCellStyle(styles.get("title"));titleCell.setCellValue(title);sheet.addMergedRegion(new CellRangeAddress(titleRow.getRowNum(),titleRow.getRowNum(), titleRow.getRowNum(), headerList.size()-1));}// Create headerif (headerList == null){throw new RuntimeException("headerList not null!");}Row headerRow = sheet.createRow(rownum++);headerRow.setHeightInPoints(16);for (int i = 0; i < headerList.size(); i++) {Cell cell = headerRow.createCell(i);cell.setCellStyle(styles.get("header"));String[] ss = StringUtils.split(headerList.get(i), "**", 2);if (ss.length==2){cell.setCellValue(ss[0]);Comment comment = sheet.createDrawingPatriarch().createCellComment(new XSSFClientAnchor(0, 0, 0, 0, (short) 3, 3, (short) 5, 6));comment.setString(new XSSFRichTextString(ss[1]));cell.setCellComment(comment);}else{cell.setCellValue(headerList.get(i));}sheet.autoSizeColumn(i);}for (int i = 0; i < headerList.size(); i++) {  int colWidth = sheet.getColumnWidth(i)*2;sheet.setColumnWidth(i, colWidth < 3000 ? 3000 : colWidth);  }}/*** 创建表格样式* @param wb 工作薄对象* @return 样式列表*/private Map<String, CellStyle> createStyles(Workbook wb) {Map<String, CellStyle> styles = new HashMap<String, CellStyle>();CellStyle style = wb.createCellStyle();style.setAlignment(CellStyle.ALIGN_CENTER);style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);Font titleFont = wb.createFont();titleFont.setFontName("Arial");titleFont.setFontHeightInPoints((short) 16);titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD);style.setFont(titleFont);styles.put("title", style);style = wb.createCellStyle();style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);style.setBorderRight(CellStyle.BORDER_THIN);style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderLeft(CellStyle.BORDER_THIN);style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderTop(CellStyle.BORDER_THIN);style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setBorderBottom(CellStyle.BORDER_THIN);style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());Font dataFont = wb.createFont();dataFont.setFontName("Arial");dataFont.setFontHeightInPoints((short) 10);style.setFont(dataFont);styles.put("data", style);style = wb.createCellStyle();style.cloneStyleFrom(styles.get("data"));style.setAlignment(CellStyle.ALIGN_LEFT);styles.put("data1", style);style = wb.createCellStyle();style.cloneStyleFrom(styles.get("data"));style.setAlignment(CellStyle.ALIGN_CENTER);styles.put("data2", style);style = wb.createCellStyle();style.cloneStyleFrom(styles.get("data"));style.setAlignment(CellStyle.ALIGN_RIGHT);styles.put("data3", style);style = wb.createCellStyle();style.cloneStyleFrom(styles.get("data"));
//      style.setWrapText(true);style.setAlignment(CellStyle.ALIGN_CENTER);style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex());style.setFillPattern(CellStyle.SOLID_FOREGROUND);Font headerFont = wb.createFont();headerFont.setFontName("Arial");headerFont.setFontHeightInPoints((short) 10);headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD);headerFont.setColor(IndexedColors.WHITE.getIndex());style.setFont(headerFont);styles.put("header", style);return styles;}

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Java后端实现Excel导出，及添加Excel文件标题样式

简单Java实现Excel文件导出

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