poi的合并单元格和冻结行列

         //创建工作薄(excel)
         Workbook wb = new HSSFWorkbook();
         //创建sheet
         Sheet createSheet = wb.createSheet("sheet1");

         //设置标题字体
         Font fontTitle = wb.createFont();
         fontTitle.setFontHeightInPoints((short) 18); //字体大小
         fontTitle.setColor(HSSFColor.BLACK.index); //字体颜色
         fontTitle.setFontName("宋体"); //字体
         fontTitle.setBoldweight(Font.BOLDWEIGHT_BOLD); //粗体显示
         //font.setItalic(true); //是否使用斜体
         //font.setStrikeout(true); //是否使用划线

         //设置标题单元格类型
         CellStyle cellStyleTitle = wb.createCellStyle();
         cellStyleTitle.setFont(fontTitle);
         cellStyleTitle.setFillForegroundColor(IndexedColors.LIME.getIndex());
         cellStyleTitle.setFillPattern(CellStyle.SOLID_FOREGROUND);
         cellStyleTitle.setAlignment(CellStyle.ALIGN_CENTER); //水平布局：居中
         cellStyleTitle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
         cellStyleTitle.setWrapText(true);//设置自动换行

         cellStyleTitle.setBorderBottom(CellStyle.BORDER_THIN); //下边框
         cellStyleTitle.setBorderLeft(CellStyle.BORDER_THIN);//左边框
         cellStyleTitle.setBorderTop(CellStyle.BORDER_THIN);//上边框
         cellStyleTitle.setBorderRight(CellStyle.BORDER_THIN);//右边框
         cellStyleTitle.setBottomBorderColor(IndexedColors.BLACK.getIndex());
         cellStyleTitle.setLeftBorderColor(IndexedColors.BLACK.getIndex());
         cellStyleTitle.setTopBorderColor(IndexedColors.BLACK.getIndex());
         cellStyleTitle.setRightBorderColor(IndexedColors.BLACK.getIndex());

         //创建合并单元格  ---begin
         CellRangeAddress region = new CellRangeAddress(0, 0, 1, 3);// 下标从0开始 起始行号，终止行号， 起始列号，终止列号
         CellRangeAddress region2 = new CellRangeAddress(1, 2, 0, 0);// 起始行号，终止行号， 起始列号，终止列号
         CellRangeAddress region3 = new CellRangeAddress(1, 1, 1, 3);// 起始行号，终止行号， 起始列号，终止列号
         //在sheet里增加合并单元格
         createSheet.addMergedRegion(region);
         createSheet.addMergedRegion(region2);
         createSheet.addMergedRegion(region3);

         // -----------填充第一行数据-------------
         Row rowTitle = createSheet.createRow(0);
         Cell cellTitle = rowTitle.createCell(0);
         cellTitle.setCellStyle(cellStyleTitle);
         cellTitle.setCellValue("");// 设置标题内容
         Cell cellTitle1_1 = rowTitle.createCell(1);
         cellTitle1_1.setCellStyle(cellStyleTitle);
         cellTitle1_1.setCellValue(dateStr);// 设置标题内容
         // -----------填充第二行数据-------------
         Row rowTitle1 = createSheet.createRow(1);
         Cell cellTitle1 = rowTitle1.createCell(0);
         cellTitle1.setCellStyle(cellStyleTitle);
         cellTitle1.setCellValue("店名");//  设置内容
         Cell cellTitle11 = rowTitle1.createCell(1);
         cellTitle11.setCellStyle(cellStyleTitle);
         cellTitle11.setCellValue("王总");//
         Cell cellTitle111 = rowTitle1.createCell(2);
         cellTitle111.setCellStyle(cellStyleTitle);
         cellTitle111.setCellValue("");// 虽然这个单元格不可以不设置，但是要给它设置样式，所以也写了
         Cell cellTitle1111 = rowTitle1.createCell(3);
         cellTitle1111.setCellStyle(cellStyleTitle);
         cellTitle1111.setCellValue("");// 虽然这个单元格不可以不设置，但是要给它设置样式，所以也写了
         // -----------填充第三行数据-------------
         Row rowTitle2 = createSheet.createRow(2);
         Cell cellTitle2 = rowTitle2.createCell(1);
         cellTitle2.setCellStyle(cellStyleTitle);
         cellTitle2.setCellValue("装修费");//  设置内容
         Cell cellTitle22 = rowTitle2.createCell(2);
         cellTitle22.setCellStyle(cellStyleTitle);
         cellTitle22.setCellValue("加盟费");//  设置内容
         Cell cellTitle222 = rowTitle2.createCell(3);
         cellTitle222.setCellStyle(cellStyleTitle);
         cellTitle222.setCellValue("人员培训费");//  设置内容
         // 合并单元格 ----end
         // 第四行数据留着下面写

         //设置表头字体
         Font fontHead = wb.createFont();
         fontHead.setFontHeightInPoints((short) 14); //字体大小
         fontHead.setColor(Font.COLOR_NORMAL); //字体颜色
         fontHead.setFontName("Microsoft Sans Serif"); //字体
         fontHead.setBoldweight(Font.BOLDWEIGHT_BOLD); //粗体显示
         //font.setItalic(true); //是否使用斜体
         //font.setStrikeout(true); //是否使用划线

         //设置表头单元格类型
         CellStyle cellStyleHead = wb.createCellStyle();
         cellStyleHead.setFont(fontHead);
         cellStyleHead.setAlignment(CellStyle.ALIGN_CENTER); //水平布局：居中
         cellStyleHead.setFillForegroundColor(IndexedColors.LIME.getIndex());
         cellStyleHead.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
         cellStyleHead.setWrapText(true);//设置自动换行

         cellStyleHead.setBorderBottom(CellStyle.BORDER_THIN); //下边框
         cellStyleHead.setBorderLeft(CellStyle.BORDER_THIN);//左边框
         cellStyleHead.setBorderTop(CellStyle.BORDER_THIN);//上边框
         cellStyleHead.setBorderRight(CellStyle.BORDER_THIN);//右边框
         cellStyleHead.setBottomBorderColor(IndexedColors.BLACK.getIndex());
         cellStyleHead.setLeftBorderColor(IndexedColors.BLACK.getIndex());
         cellStyleHead.setTopBorderColor(IndexedColors.BLACK.getIndex());
         cellStyleHead.setRightBorderColor(IndexedColors.BLACK.getIndex());

         //创建第一行，标题
         Row row = createSheet.createRow(3);
         String[] cellHead = {"", "","", ""};
         // 设置列宽
         double[] titleWidth = {10, 24, 24, 24};
         for (int i = 0; i < cellHead.length; i++) {
             Cell createCell = row.createCell(i);
             createCell.setCellValue(cellHead[i]);
             createCell.setCellStyle(cellStyleHead);
         }

         //设置内容字体
         Font fontData = wb.createFont();
         fontData.setFontHeightInPoints((short) 14); //字体大小
         fontData.setColor(Font.COLOR_NORMAL); //字体颜色
         fontData.setFontName("Microsoft Sans Serif"); //字体
         //font.setBoldweight(Font.BOLDWEIGHT_BOLD); //粗体显示
         //font.setItalic(true); //是否使用斜体
         //font.setStrikeout(true); //是否使用划线

         //设置内容单元格类型
         CellStyle cellStyleDataOdd = wb.createCellStyle();
         cellStyleDataOdd.setFont(fontData);
         cellStyleDataOdd.setFillPattern(CellStyle.SOLID_FOREGROUND);
         cellStyleDataOdd.setAlignment(CellStyle.ALIGN_CENTER); //水平布局：居中
         cellStyleDataOdd.setWrapText(true);

         cellStyleDataOdd.setBorderBottom(CellStyle.BORDER_THIN); //下边框
         cellStyleDataOdd.setBorderLeft(CellStyle.BORDER_THIN);//左边框
         cellStyleDataOdd.setBorderTop(CellStyle.BORDER_THIN);//上边框
         cellStyleDataOdd.setBorderRight(CellStyle.BORDER_THIN);//右边框
         cellStyleDataOdd.setBottomBorderColor(IndexedColors.BLACK.getIndex());
         cellStyleDataOdd.setLeftBorderColor(IndexedColors.BLACK.getIndex());
         cellStyleDataOdd.setTopBorderColor(IndexedColors.BLACK.getIndex());
         cellStyleDataOdd.setRightBorderColor(IndexedColors.BLACK.getIndex());

         try {
             int no = 1;
             for (int i = 0; i < datas.length(); i++) {
                 JSONObject dayData = datas.getJSONObject(i);
                 String date = dayData.optString("date");
                 JSONArray detail = dayData.getJSONArray("detail");

                 for (int k = 0; k < detail.length(); k++) {
                     JSONObject ss = detail.getJSONObject(k);

                     row = createSheet.createRow(k + 4);
                     int j = 0;
                     // 店名
                     Cell cell1 = row.createCell(j++);
                     cell1.setCellValue(ss.optString("xxxxx"));
                     cell1.setCellStyle(cellStyleDataOdd);
                     // 装修费
                     Cell cell2 = row.createCell(j++);
                     cell2.setCellValue(ss.optString("xxxxx"));
                     cell2.setCellStyle(cellStyleDataOdd);
                     // 加盟费
                     Cell cell7 = row.createCell(j++);
                     cell7.setCellValue(ss.optString("xxxxxx"));
                     cell7.setCellStyle(cellStyleDataOdd);
                     // 人员培训费
                     Cell cellH = row.createCell(j++);
                     cellH.setCellValue(ss.optString("xxxxxx"));
                     cellH.setCellStyle(cellStyleDataOdd);
                 }
             }

         } catch (JSONException e) {
             e.printStackTrace();
         }

         // 设置列宽
         for (int i = 0; i < titleWidth.length; i++) {
              createSheet.setColumnWidth((short) i, (short) titleWidth[i] * 256);
         }

         // 设置上面四行冻结
         createSheet.createFreezePane( 0, 4, 1, 4); // 前两个参数是你要用来拆分的列数和行数。后两个参数是下面窗口的可见象限，其中第三个参数是右边区域可见的左边列数，第四个参数是下面区域可见的首行