java生成excel文件

   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();}