jxl生成一个Excel

WritableWorkbook wwb = null;
           // 创建可写入的Excel工作簿
           filePath = this.getRequest().getServletContext().getRealPath("/")+filePath;
           File file=new File(filePath);
           //以fileName为文件名来创建一个Workbook
           wwb = Workbook.createWorkbook(file);
           // 创建工作表
           WritableSheet ws = wwb.createSheet("Test Shee 1", 0);
           /**
           * 定义单元格样式
           */
           WritableFont wf_title = new WritableFont(WritableFont.ARIAL, 12,
           WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.BLACK); // 定义格式字体粗体斜体下划线颜色
           WritableFont wf_titlebt = new WritableFont(WritableFont.ARIAL, 12,
                   WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.RED);//必填项格式
           WritableCellFormat wcf_title = new WritableCellFormat(wf_title); // 单元格定义
           WritableCellFormat wcf_titlebt = new WritableCellFormat(wf_titlebt); // 单元格定义
           wcf_title.setWrap(true);
           wcf_title.setAlignment(jxl.format.Alignment.CENTRE); // 设置对齐方式
           wcf_title.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE); // 设置对齐方式
           wcf_title.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.THIN,jxl.format.Colour.BLACK); //设置边框
           wcf_titlebt.setAlignment(jxl.format.Alignment.CENTRE); // 设置对齐方式
           wcf_titlebt.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE); // 设置对齐方式
           wcf_titlebt.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.THIN,jxl.format.Colour.BLACK); //设置边框

           WritableFont wf_table = new WritableFont(WritableFont.ARIAL, 10,
           WritableFont.NO_BOLD, false, UnderlineStyle.NO_UNDERLINE,jxl.format.Colour.BLACK); // 定义格式字体粗体斜体下划线颜色
           WritableCellFormat wcf_table = new WritableCellFormat(wf_table); // 单元格定义
           wcf_table.setAlignment(jxl.format.Alignment.CENTRE); // 设置对齐方式
           wcf_table.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE); // 设置对齐方式
           wcf_table.setBorder(jxl.format.Border.ALL, jxl.format.BorderLineStyle.THIN,jxl.format.Colour.BLACK); //设置边框
           ws.mergeCells(0, 0, list.size()-1, 0);
           for(int i=0;i<list.size();i++){
           ws.setColumnView(i, 20); // 设置列的宽度
           }

Label title20=new Label(0,0,“恶趣味权威”。",wcf_titlebt);
ws.addCell(title20);

//写进文档
           wwb.write();
           // 关闭Excel工作簿对象
           wwb.close();
           //下载模板
           fileDownload(response,filePath,fileName);

fielDownload 方法：

public void fileDownload(HttpServletResponse response, String filePath,String fileName){
           byte[] data;
           try {
               data = FileUtil.toByteArray2(filePath);
           fileName = URLEncoder.encode(fileName, "UTF-8");
           response.reset();
           response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
           response.addHeader("Content-Length", "" + data.length);
           response.setContentType("application/octet-stream;charset=UTF-8");
           OutputStream outputStream = new BufferedOutputStream(response.getOutputStream());
           outputStream.write(data);
           outputStream.flush();
           outputStream.close();
           response.flushBuffer();
           } catch (IOException e) {
               logger.error("下载文件过程中，文件流异常！！");
               e.printStackTrace();
           }
       }

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