• String real_path = request.getSession().getServletContext().getRealPath("/");//獲取檔案路徑，我是通過模板進行匯出，在專案中拿到模板
• if (!real_path.endsWith("/")) {
• 　　real_path = real_path + "/";
• }
• String r_url = real_path + "excel/bixuan.xls";//拼接好檔案的完整路徑
• String excelPath = r_url;
• String sheetName = "Sheet1";//獲取到不同的sheet頁。
• String sheetName1 = "Sheet2";

//拿到檔案路徑後建立excel物件

• File f = new File(excelPath );
• FileInputStream fis =fis = new FileInputStream(f);
• HSSFWorkbook wb =wb = new HSSFWorkbook(fis);
• HSSFWorkbook wb = util.createWorkBook(excelPath);
• HSSFSheet sheet = wb.getSheet(sheetName)
• HSSFSheet sheet1 = wb.getSheet(sheetName1)

//設定樣式

• HSSFCellStyle style = wb.createCellStyle();
• style.setWrapText(true);
• style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
• style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

//設定邊框

• style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下邊框
• style.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左邊框
• style.setBorderTop(HSSFCellStyle.BORDER_THIN);//上邊框
• style.setBorderRight(HSSFCellStyle.BORDER_THIN);//右邊框

//設定字型

• HSSFFont font2 = wb.createFont();
• font2.setFontName("仿宋_GB2312"); 
• font2.setFontHeightInPoints((short) 9);//字型大小
• style.setFont(font2);
• sheet.protectSheet("123456");//設定密碼，保護單元格
• sheet1.protectSheet("123456");
• style.setWrapText(true);//一定要有這個，否則設定單元格密碼失效

//在excel中插入的行

• sheet.shiftRows(len-1, len+20, find.size()-5, true, false);//引數詳解  1從這行行開始移動，2到那行結束 3移動的數量 

//合併單元格後，邊框樣式對合並的單元格不起作用，需要用下面程式碼處理

• CellRangeAddress cellRangeAddress = new CellRangeAddress(len-1,len-1,3,5);//引數，合併單元格的開始行數，與結束行數。
• int addMergedRegion = sheet.addMergedRegion(cellRangeAddress);//合併單元格
• sheet.getRow(len-1).getCell(2).setCellStyle(style);設定樣式

//不同瀏覽器對匯出的excel有不同的編碼，做如下處理

• if(isMSBrowser(request)){
• xlsName = java.net.URLEncoder.encode(xlsName, "utf-8") + ".xls";
• } else {
• xlsName = new String(xlsName.getBytes("utf-8"), "iso-8859-1") + ".xls";
• }

//判斷是不是ie瀏覽器

• public boolean isMSBrowser(HttpServletRequest request) {
• String[] IEBrowserSignals = {"MSIE", "Trident", "Edge"};
• String userAgent = request.getHeader("User-Agent");
• for (String signal : IEBrowserSignals) {
• if (userAgent.contains(signal)){
• return true;
• }
• }
• return false;
• }

//封裝一下對合並單元格的邊框處理

• public void setBorderStyle(int border, CellRangeAddress region, HSSFSheet sheet, HSSFWorkbook wb){
• RegionUtil.setBorderBottom(border, region, sheet, wb);//下邊框
• RegionUtil.setBorderLeft(border, region, sheet, wb);//左邊框
• RegionUtil.setBorderRight(border, region, sheet, wb); //右邊框
• RegionUtil.setBorderTop(border, region, sheet, wb); //上邊框
• }

借鑑部落格：https://www.cnblogs.com/staticxy/p/6122336.html

　　　　https://www.cnblogs.com/dcncy/p/8041657.html