java对excel表格的处理

项目中需要将结果集保存到一个excel表格中， 下面是我的实现方法

先要把jxl.jar包下载copy到classpath路径下

public class SpcpExcel {

    //os应为response.getOutputStream(),list为需要写入表格的数据集，
    public static void writeExcel(OutputStream os, List list) throws Exception {
        WritableWorkbook wwb = Workbook.createWorkbook(os);
        WritableSheet ws = wwb.createSheet("sheet1",0);//设置表单的名称
        if(list!=null){
            Label labela = new Label(0,0,"栏目名称");   //零列零行
            ws.addCell(labela);
            Label labelc = new Label(1,0,"访问次数");
            ws.addCell(labelc);
            Label labelb = new Label(2,0,"访问流量");
            ws.addCell(labelb);

            HashMap hm = null;
                for (int i = 0; i < list.size(); i++) {
                    hm = (HashMap) list.get(i);
                    String tab = hm.get("csdm").toString();

                    //之前为了表现层次关系将数据取出后加了些&nbsp
                    Label labelC = new Label(0,(i+1),tab.replaceAll("&nbsp;"," "));
                    ws.addCell(labelC);
                    Label labelE = new Label(1,(i+1),hm.get("csdj").toString());
                    ws.addCell(labelE);
                    Label labelD = new Label(2,(i+1),hm.get("cscs").toString());
                    ws.addCell(labelD);
                }

        }
        wwb.write();//写入Exel工作表
        wwb.close();//关闭Excel工作薄对象
    }
}