Apache POI 实现Excel文件单元格合并、冻结和文件导出

//经常用到poi导出excel操作，所以留几行代码，以备他日之需 Workbook wb = new HSSFWorkbook(); Sheet sheet = wb.createSheet("sheet1"); Row row = null; Cell cell = null; //创建表头单元格样式 CellStyle cs_header = wb.createCellStyle(); Font boldFont = wb.createFont(); boldFont.setFontName("Consolas"); boldFont.setFontHeightInPoints((short)14); cs_header.setFont(boldFont); cs_header.setBorderBottom((short)1); cs_header.setBorderLeft((short)1); cs_header.setBorderRight((short)1); cs_header.setBorderTop((short)1); //第一行，时间 row = sheet.createRow((short)0); row.setHeightInPoints((short)24); createMultiCell(row,cell,cs_header,0,31,"访问日期："+time1+" to "+time2); //第二行，大标题 row = sheet.createRow((short)1); row.setHeightInPoints((short)24); createMultiCell(row,cell,cs_header,0,6," "); createMultiCell(row,cell,cs_header,6,25,"访问路径"); //第三行，列标题 row = sheet.createRow((short)2); row.setHeightInPoints((short)24); String[] headers = new String[]{"访问时间","地域","来源","关键字","进入页","停留时间","访问页数", "1时间","1停留","1页面","2时间","2停留","2页面","3时间","3停留","3页面","4时间","4停留","4页面", "5时间","5停留","5页面","6时间","6停留","6页面","7时间","7停留","7页面","8时间","8停留","8页面"}; for(int i=0; i<headers.length; i++){ cell = row.createCell((short)i);cell.setCellValue(headers[i]);cell.setCellStyle(cs_header); } //创建文本单元格样式 CellStyle cs_text = wb.createCellStyle(); Font textFont = wb.createFont(); textFont.setFontName("Consolas"); textFont.setFontHeightInPoints((short)10); cs_text.setFont(textFont); cs_text.setBorderBottom((short)1); cs_text.setBorderLeft((short)1); cs_text.setBorderRight((short)1); cs_text.setBorderTop((short)1); //将数据写入表格 for(int i=0; i<list.size(); i++){ row = sheet.createRow((short)(i+3)); Object[] rw = list.get(i); for(int j=0; j<rw.length; j++){ cell = row.createCell((short)j); cell.setCellValue(rw[j].toString()); cell.setCellStyle(cs_text); } } //合并第1行1-32列 sheet.addMergedRegion(new CellRangeAddress((short)0, (short)0, (short)0, (short)31)); //合并第2行1-6列 sheet.addMergedRegion(new CellRangeAddress((short)1, (short)1, (short)0, (short)6)); //合并第2行7-32行 sheet.addMergedRegion(new CellRangeAddress((short)1, (short)1, (short)7, (short)31)); //冻结7X3(宽,高)区域中的单元格 sheet.createFreezePane(7, 3); try { //将workbook写到输入流(下载时候，这个输出流可能是ServletOutStream，写入文件是FileOutputStream，等等) wb.write(os); } catch (IOException e) { e.printStackTrace(); }