public HSSFWorkbook CreateJZZJSList()  {// 绘制ExcelString fileName = "自动分析详情";HSSFWorkbook wb = new HSSFWorkbook();//创建工作相簿对象HSSFSheet sheet = wb.createSheet(fileName); // --->创建了一个工作簿sheet.setDefaultRowHeight((short) 600); // ---->有得时候你想设置统一单元格的高度，就用这个方法sheet.setDefaultColumnWidth((short) 40);sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 6));// 表格样式固定为15列，此处合并列// 绘制第一行HSSFRow firstrow = sheet.createRow(0); // 下标为0的行开始HSSFCell title = firstrow.createCell(0);HSSFCellStyle style = wb.createCellStyle();title.setCellStyle(style);title.setCellValue(fileName);// 绘制标题行HSSFRow colTitlerow5 = sheet.createRow(1); // 绘制第2行HSSFCell colTitlerowCol5 = colTitlerow5.createCell(0);colTitlerowCol5.setCellStyle(style);colTitlerowCol5.setCellValue("序号");HSSFCell colTitlerowCol6 = colTitlerow5.createCell(1);colTitlerowCol6.setCellStyle(style);colTitlerowCol6.setCellValue("单位名称");//查询数据以行形式便利for (int i = 0; i < 6; i++) {HSSFRow row = sheet.createRow(i + 2);//创建行HSSFCell row5 = row.createCell(0);//创建列row5.setCellStyle(style);row5.setCellValue((i + 1));HSSFCell row6 = row.createCell(1);//创建列row6.setCellStyle(style);row6.setCellValue(("我是第二列"));}return wb;}

2.再写一个进入类

    @RequestMapping("/inser")public void btnDaoChuExcel_Click(HttpServletResponse response)   {// 生成Xls并导出String xlsName = "自动分析详情表";HSSFWorkbook wb = CreateJZZJSList();try {response.reset();String fileName = new String((xlsName + ".xls").getBytes("gb2312"), "ISO8859-1");response.setContentType("application/x-msdownload");response.setHeader("Content-disposition", "attachment; filename=" + fileName);OutputStream out = response.getOutputStream();wb.write(out);out.flush();out.close();wb.close();} catch (IOException e) {e.printStackTrace();}}

解析