java用jxl数据库导出excel通用方法

public class ExportExcelJXL {
    /***************************************************************************
     * @param fileName
     *            EXCEL文件名称
     * @param listTitle
     *            EXCEL文件第一行列标题集合
     * @param listContent
     *            EXCEL文件正文数据集合
     * @return
     */
    public final static String exportExcel(String fileName, String headTitle, String[] Title, List<Object> listContent) {
        
        System.out.println("进入导出环节"+fileName);
      
        System.out.println();
       
        String result = "系统提示：Excel文件导出成功！";
        // 以下开始输出到EXCEL
        try {
            System.out.println("进入try");
            
            // 定义输出流，以便打开保存对话框______________________begin
            HttpServletResponse response = ServletActionContext.getResponse();
            OutputStream os = response.getOutputStream();// 取得输出流
            response.reset();// 清空输出流
            response.setHeader("Content-disposition", "attachment; filename="
                    + new String(fileName.getBytes("GB2312"), "ISO8859-1"));
            // 设定输出文件头
            response.setContentType("application/msexcel");// 定义输出类型
            // 定义输出流，以便打开保存对话框_______________________end

            /** **********创建工作簿************ */
            WritableWorkbook workbook = Workbook.createWorkbook(os);

            /** **********创建工作表************ */

            WritableSheet sheet = workbook.createSheet("Sheet1", 0);

            /** **********设置纵横打印（默认为纵打）、打印纸***************** */
            jxl.SheetSettings sheetset = sheet.getSettings();
            sheetset.setProtected(false);

            /** ************设置单元格字体************** */
            WritableFont NormalFont = new WritableFont(WritableFont.ARIAL, 10);
            WritableFont BoldFont = new WritableFont(WritableFont.ARIAL, 10, WritableFont.BOLD);

            /** ************以下设置三种单元格样式，灵活备用************ */
            // 用于标题居中
            WritableCellFormat wcf_center = new WritableCellFormat(BoldFont);
            wcf_center.setBorder(Border.ALL, BorderLineStyle.THIN); // 线条
            wcf_center.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
            wcf_center.setAlignment(Alignment.CENTRE); // 文字水平对齐
            wcf_center.setWrap(false); // 文字是否换行

            // 用于正文居左
            WritableCellFormat wcf_left = new WritableCellFormat(NormalFont);
            wcf_left.setBorder(Border.NONE, BorderLineStyle.THIN); // 线条
            wcf_left.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
            wcf_left.setAlignment(Alignment.LEFT); // 文字水平对齐
            wcf_left.setWrap(false); // 文字是否换行

            /** ***************以下是EXCEL开头大标题，暂时省略********************* */
            if (headTitle != null && headTitle.length() == 0) {
                sheet.mergeCells(0, 0, 120, 0);
                sheet.addCell(new Label(0, 0, headTitle, wcf_center));
            }
            /** ***************以下是EXCEL第一行列标题********************* */
            for (int i = 0; i < Title.length; i++) {
                sheet.addCell(new Label(i, 0, Title[i], wcf_center));
            }
            /** ***************以下是EXCEL正文数据********************* */
            Field[] fields = null;
            int i = 1;
            for (Object obj : listContent) {
                fields = obj.getClass().getDeclaredFields();
                int j = 0;
                for (Field v : fields) {
                    v.setAccessible(true);
                    Object va = v.get(obj);
                    if (va == null) {
                        va = "";
                    }
                    sheet.addCell(new Label(j, i, va.toString(), wcf_left));
                    j++;
                }
                i++;
            }
            /** **********将以上缓存中的内容写到EXCEL文件中******** */
            workbook.write();
            /** *********关闭文件************* */
            workbook.close();

        } catch (Exception e) {
            result = "系统提示：Excel文件导出失败，原因：" + e.toString();
            System.out.println(result);
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 导出excel
     * 
     * @return
     */
    public String excelPage() {
        ExportExcelJXL excel = new ExportExcelJXL();
        String str = "";
        //str = new String(StrutsUtils.getRequest().getParameter("wineOrg.orgName").getBytes("iso8859-1"), "UTF-8");
        List<Object> li = new ArrayList<Object>();
        String[] Title = { "机构ID", "会员编号", "类别", "名称", "省ID", "省名称", "城市ID", "城市名称", "详细地址", "联系人", "性别", "联系手机",
                "联系电话", "传真", "邮箱", "QQ", "生日", "积分", "客户等级", "现金账户余额", "结算方式", "客户类型", "购买次数", "购买支数", "创建人ID",
                "创建人姓名", "create_time", "del", "STS", "备注", "负责人ID", "负责人姓名", "审核标识", "审核人ID ", "审核人姓名", "审核日期",
                "分配人ID", "分配人姓名", "分配日期", "修改人ID", "修改人姓名  ", "修改时间" };
        excel.exportExcel("客户资料信息.xls", str, Title, li);
        return "";
    }
}