jxl将list导入到Excel中供下载

jxl操作excel

    /**
     * 分隔符
     */
    private final static String SEPARATOR = "|";

    /**
     * 由List导出至指定的Sheet,带total行(最后一行)
     * @param wb   模板的workbook
     * @param sheetNum   第几个表单
     * @param targetFilePath 生成文件夹路径
     * @param l 内容list集合,以|分割的对象string集合
     * @param headInfoRows  头信息的行数
     * @param columnsLength  列数
     * @param remarkRowNumber 备注所在行
     * @param remark  备注
     * @return
     * @throws WriteException
     * @throws IOException
     * int
     */
    public static int exportExcelFromList(jxl.Workbook wb, int sheetNum,
            String targetFilePath, List<String> l, int headInfoRows,
            int columnsLength,int remarkRowNumber,String remark) throws WriteException, IOException {
        // 创建可写入的Excel工作薄对象
        WritableWorkbook wwb = null;
        int writeCount = 0;

        // 单元格样式
        // WritableFont bold = new
        // WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD);//设置字体种类和黑体显示,字体为Arial,字号大小为10,采用黑体显示
        WritableCellFormat normalFormat = new WritableCellFormat(
                NumberFormats.TEXT);
        normalFormat.setBorder(Border.ALL, BorderLineStyle.THIN,
                jxl.format.Colour.BLACK);

        //设置字体;
        WritableFont font = new WritableFont(WritableFont.ARIAL,10,WritableFont.BOLD,false,UnderlineStyle.NO_UNDERLINE,Colour.RED);
        WritableCellFormat normalFormat_total = new WritableCellFormat(
                font);
        normalFormat_total.setBorder(Border.ALL, BorderLineStyle.THIN,
                jxl.format.Colour.BLACK);

        try {

            // 创建可写入的Excel工作薄对象
            wwb = jxl.Workbook.createWorkbook(new File(targetFilePath), wb);
            WritableSheet ws = wwb.getSheet(0);

            Label cellRemark = new Label(0, remarkRowNumber, remark,
                    normalFormat);
            ws.addCell(cellRemark);

            int row = l.size();
            int columns = columnsLength;
            String[] ary = new String[120];

            for (int i = 0; i < row; i++) {
                ary = l.get(i).split("\\" + SEPARATOR);
                for (int j = 0; j < columns; j++) {

                    if(i==row-1)
                    {
                        Label cell = new Label(j, i + headInfoRows, ary[j],
                                normalFormat_total);
                        ws.addCell(cell);
                    }else
                    {
                        Label cell = new Label(j, i + headInfoRows, ary[j],
                                normalFormat);
                        ws.addCell(cell);
                    }
                }
                writeCount++;
            }
            wwb.write();
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            if (wwb != null) {
                wwb.close();
            }

        }

        return writeCount;

    }

    /**
     * 导出不需要合计行
     * @param wb
     * @param sheetNum
     * @param targetFilePath
     * @param l
     * @param headInfoRows
     * @param columnsLength
     * @param remarkRowNumber
     * @param remark
     * @return
     * @throws WriteException
     * @throws IOException
     */
    public static int exportExcelFromListNoTotal(jxl.Workbook wb, int sheetNum,
            String targetFilePath, List<String> l, int headInfoRows,
            int columnsLength,int remarkRowNumber,String remark) throws WriteException, IOException {
        // 创建可写入的Excel工作薄对象
        WritableWorkbook wwb = null;
        int writeCount = 0;

        // 单元格样式
        // WritableFont bold = new
        // WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD);//设置字体种类和黑体显示,字体为Arial,字号大小为10,采用黑体显示
        WritableCellFormat normalFormat = new WritableCellFormat(
                NumberFormats.TEXT);
        normalFormat.setBorder(Border.ALL, BorderLineStyle.THIN,
                jxl.format.Colour.BLACK);

        //设置字体;
        WritableFont font = new WritableFont(WritableFont.ARIAL,10,WritableFont.BOLD,false,UnderlineStyle.NO_UNDERLINE,Colour.BLACK);
        WritableCellFormat normalFormat_total = new WritableCellFormat(
                font);
        normalFormat_total.setBorder(Border.ALL, BorderLineStyle.THIN,
                jxl.format.Colour.BLACK);

        try {

            // 创建可写入的Excel工作薄对象
            wwb = jxl.Workbook.createWorkbook(new File(targetFilePath), wb);
            WritableSheet ws = wwb.getSheet(0);

            Label cellRemark = new Label(0, remarkRowNumber, remark,
                    normalFormat);
            ws.addCell(cellRemark);

            int row = l.size();
            int columns = columnsLength;
            String[] ary = new String[120];

            for (int i = 0; i < row; i++) {
                ary = l.get(i).split("\\" + SEPARATOR);
                for (int j = 0; j < columns; j++) {

                        Label cell = new Label(j, i + headInfoRows, ary[j],
                                normalFormat);
                        ws.addCell(cell);
                }
                writeCount++;
            }
            wwb.write();
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            if (wwb != null) {
                wwb.close();
            }

        }

        return writeCount;

    }

exportList为List<String>，生成方式为遍历每个对象并将所有属性以|串起来

        List<DetectorHistory> dfList = service.getList();   //获取对象集合

        List<String> exportList = new ArrayList<String>();
        StringBuffer sbList = new StringBuffer();
        if (dfList!=null&&dfList.size()>0) {
            for (DetectorHistory ele:dfList) {
                sbList.delete(0, sbList.length());
　　　　　　　　　　//加入|
                 //加入属性
                 ...
                exportList.add(sbList.toString());
            }
        }

controller层

        //模板所在文件夹路径
        String tempPath = req.getSession().getServletContext()
        .getRealPath(CommonValue.FileTemplatePath);
        //生成文件所在文件夹路径
String exportFilePath = req.getSession().getServletContext()
        .getRealPath(CommonValue.ExportFilePath);
        //导出文件名
        String exportFileName = "";
        //模板文件名,事先生成好以及头文件情况
        String targetFileName = "ReportTmp_detectorHistory.xls";

        //生成的行数
        int operatorCount = 0; 

        JSONObject jsonObject = new JSONObject();
        try {
            // 文件导出
            if (exportList.size() > 0) {
                //生成文件名
                exportFileName = "detectorHistory" + CommonTool.getNowDateStr2()
                        + "." + targetFileName.split("\\.")[1];
                //利用模板生成Workbook
                Workbook rw = jxl.Workbook.getWorkbook(new File(tempPath
                        + File.separator + targetFileName));

                // 写入备注文件
                String remarkInfo = "统计时间:" + CommonTool.getNowDateStr2() + "    金额单位:元";

                //rw为模板workbook，0为sheetnum，其次为导出文件路径，exportList为|分割属性的string对象集合,4为头的行数,14为列数,1为备注所在行(从0开始),remarkinfo为备注所在行的信息
                operatorCount = ExcelHelper_ChargeSituation.exportExcelFromListNoTotal(rw,
                        0, exportFilePath + File.separator + exportFileName,
                        exportList, 4, 14, 1, remarkInfo);

            }

            jsonObject.put("operatorCount", operatorCount);  //返回操作条数
            jsonObject.put("exportFilePath", CommonValue.ExportFilePath
                    + File.separator + exportFileName);  //返回生成的文件路径

            if(jsonObject.get("operatorCount")!=null&&Integer.valueOf(jsonObject.get("operatorCount").toString())<=0)
            {//当生成内容条数为0时
                jsonObject.put("rtnCode", "404");
            }else
            {
                jsonObject.put("rtnCode", "0");
            }
        } catch (BiffException e) {
            e.printStackTrace();
        } catch (WriteException e) {
            e.printStackTrace();
        }finally{

        }

        res.resetBuffer();
        res.setContentType("text/html;charset=UTF-8");
        res.getOutputStream().write(jsonObject.toString().getBytes("utf-8"));
        res.getOutputStream().flush();
        return null;