首先下载jexcelapi_2_6_12.tar.gz，解压后将里面的jxl.jar复制到WEB-INF/lib目录下面    
　　　　 String filePath = request.getParameter("filePath");        filePath=filePath.replaceAll("\\\\", "/");        FileOutputStream os = new FileOutputStream(new File(filePath));       //创建工作薄        WritableWorkbook workbook = Workbook.createWorkbook(os);        //创建新的一页        WritableSheet sheet = workbook.createSheet("First Sheet",0);        //创建要显示的内容,创建一个单元格，第一个参数为列坐标，第二个参数为行坐标，第三个参数为内容        try{            ResultSet rs = null;            SQLBean dbMsg = new SQLBean();            dbMsg.getConncetion();            dbMsg.getStatement();            String sql = request.getParameter("sql");            rs = dbMsg.getResultSet(sql);            Label tmp = new Label(0,0,"园类型");            sheet.addCell(tmp);            tmp = new Label(1,0,"楼标号");            sheet.addCell(tmp);            tmp = new Label(2,0,"用户名");            sheet.addCell(tmp);            tmp = new Label(3,0,"联系方式");            sheet.addCell(tmp);            tmp = new Label(4,0,"订餐类型");            sheet.addCell(tmp);            tmp = new Label(5,0,"订餐名称");            sheet.addCell(tmp);            tmp = new Label(6,0,"订餐份数");            sheet.addCell(tmp);            tmp = new Label(7,0,"支付总金额");            sheet.addCell(tmp);            tmp = new Label(8,0,"付款方式");            sheet.addCell(tmp);            tmp = new Label(9,0,"订单时间");            sheet.addCell(tmp);            int row = 0;            while(rs.next()){                ++row;                for(int i=1; i<=10; ++i){                    tmp = new Label(i-1,row, rs.getString(i));                    sheet.addCell(tmp);                }            }        } catch (Exception e){            out.println("数据生成错误!");        } finally{            //把创建的内容写入到输出流中，并关闭输出流            workbook.write();            workbook.close();            os.close();        }