导出Excel格式数据

  /**
     * 导出规则统计数据 excel格式
     * @param bill
     * @return
     */
    public String exportExamsignupExamnoExcel ( String tablename )
    {
        try
        {
            String filename = System.currentTimeMillis() + ".xls";
            ExcelTool excelTool = Global.getInstance().getExcelTool();
            ArrayList<EntityBean> rows = new ArrayList<EntityBean>();
            SearchParameters par = new SearchParameters();
            par.setName("LBIDrulecountbytable");
            par.addParameter("tablename", tablename, 11);
            EntityBean[] beanlst = par.beanSearch();
            if ( beanlst != null && beanlst.length > 0 )
            {

                EntityBean bean_tname = new EntityBean();
                EntityBean bean_rule = new EntityBean();
                EntityBean bean_count = new EntityBean();
                EntityBean bean_percent = new EntityBean();

                bean_tname.put("tablename", "表名");
                bean_rule.put("rule", "规则名");
                bean_count.put("counts", "符合规则量");
                bean_percent.put("percents", "占比");

                for (int i = 0; i < beanlst.length; i++)
                {
                    EntityBean ubean = beanlst[i];

                    bean_tname.put("tablename"+i, ubean.getString("tablename"));
                    bean_rule.put("rule"+i, ubean.getString("rule"));
                    bean_count.put("counts"+i, ubean.getString("counts"));
                    bean_percent.put("percents"+i, ubean.getString("percents"));

                }
                rows.add(bean_tname);
                rows.add(bean_rule);
                rows.add(bean_count);
                rows.add(bean_percent);
                excelTool.addValue("list", rows);
                if ( !new File(Global.getInstance().getRootPath() + "/ExcelReports/").exists() )
                {
                    new File(Global.getInstance().getRootPath() + "/ExcelReports/").mkdirs();
                }
                File file = new File(Global.getInstance().getRootPath() + "/ExcelReports/" + filename);
                if ( file != null && file.exists() )
                {
                    file.delete();
                }
                if ( this.getContext().getCurrentApplicationSysCode().equals("12.002000000000000000000000000000000") )
                {
                    excelTool.export(Global.getInstance().getRootPath() + "/ExcelTemplate/LBIDmodule.xls", Global.getInstance()
                            .getRootPath() + "/ExcelReports/" + filename);
                }
                else
                {
                    excelTool.export(Global.getInstance().getRootPath() + "/ExcelTemplate/LBIDmodule.xls", Global.getInstance()
                            .getRootPath() + "/ExcelReports/" + filename);
                }
                return filename;
            }
        }
        catch (Exception e)
        {
            Global.getInstance().LogError(this, e);
            e.printStackTrace();
            return null;
        }
        return null;
    }