struts2 导出excel

	public String ExcelExport() throws Exception{
		
		HttpServletResponse response = ServletActionContext.getResponse();
		// 定义request ,response.

		// 查询下载附件.
		// 设置下载头信息.begin
		response.setCharacterEncoding("UTF-8");
		response.setContentType("file");
		response.setHeader("Content-Disposition", "attachment; filename="+ new String("报表.xls".getBytes("GB2312"), "iso8859-1"));
		// 这个地方一定要进行编码的转换要不然中文字符会出现乱码.
		// 设置下载头信息.end,
		HttpServletRequest request = ServletActionContext.getRequest();

		OutputStream output = null;
		InputStream fis = null;
		try {
			output = response.getOutputStream();
			jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(output);
			jxl.write.WritableSheet ws = wwb.createSheet("各项产品月销售收入统计汇总表 ", 0);

			
			WritableFont wf = new WritableFont(WritableFont.ARIAL, 10,
				     WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE,
				     jxl.format.Colour.BLACK); // 定义格式 字体 下划线 斜体 粗体 颜色
			
			//创建格式化对象实例    
			WritableCellFormat totalx2Format = new WritableCellFormat(wf);    
			     
			//垂直居中    
			totalx2Format.setVerticalAlignment(VerticalAlignment.CENTRE);    
			     
			//水平居中    
			totalx2Format.setAlignment(Alignment.CENTRE); 
			
			

			
			// 设置标题.ws.addCell(new jxl.write.Label(列, 行, 内容.));
			
			ws.addCell(new Label(0, 1, "单位名称",totalx2Format));
			ws.addCell(new Label(1, 1, "神州通(含邮政汇款)",totalx2Format));
			ws.addCell(new Label(7, 1, "充值卡",totalx2Format));
			ws.addCell(new Label(13, 1, "在线定卡",totalx2Format));
			ws.addCell(new Label(15, 1, "本月销售总金额(单位：元)",totalx2Format));
	
			ws.addCell(new Label(1, 2, "20元面值",totalx2Format));
			ws.addCell(new Label(3, 2, "25元面值",totalx2Format));
			ws.addCell(new Label(5, 2, "50元面值",totalx2Format));
			ws.addCell(new Label(7, 2, "30元面值",totalx2Format));
			ws.addCell(new Label(9, 2, "50元面值",totalx2Format));
			ws.addCell(new Label(11, 2, "100元面值",totalx2Format));
			ws.addCell(new Label(13, 2, "数量(张)",totalx2Format));
			ws.addCell(new Label(14, 2, "金额(元)",totalx2Format));
			
			
			ws.addCell(new Label(1, 3, "数量(张)",totalx2Format));
			ws.addCell(new Label(2, 3, "金额(元)",totalx2Format));
			ws.addCell(new Label(3, 3, "数量(张)",totalx2Format));
			ws.addCell(new Label(4, 3, "金额(元)",totalx2Format));
			ws.addCell(new Label(5, 3, "数量(张)",totalx2Format));
			ws.addCell(new Label(6, 3, "金额(元)",totalx2Format));
			ws.addCell(new Label(7, 3, "数量(张)",totalx2Format));
			ws.addCell(new Label(8, 3, "金额(元)",totalx2Format));
			ws.addCell(new Label(9, 3, "数量(张)",totalx2Format));
			ws.addCell(new Label(10, 3, "金额(元)",totalx2Format));
			ws.addCell(new Label(11, 3, "数量(张)",totalx2Format));
			ws.addCell(new Label(12, 3, "金额(元)",totalx2Format));

			ws.mergeCells(0, 1, 0, 3); //合并单元格，参数格式（开始列，开始行，结束列，结束行）
			ws.mergeCells(1, 1, 6, 1);
			ws.mergeCells(7, 1, 12, 1);
			ws.mergeCells(13, 1, 14, 1);
			
			ws.mergeCells(1, 2, 2, 2);
			ws.mergeCells(3, 2, 4, 2);
			ws.mergeCells(5, 2, 6, 2);
			ws.mergeCells(7, 2, 8, 2);
			ws.mergeCells(9, 2, 10, 2);
			ws.mergeCells(11, 2, 12, 2);
			
			ws.mergeCells(13, 2, 13, 3);
			ws.mergeCells(14, 2, 14, 3);
			
			ws.mergeCells(15, 1, 15, 3);

			ws.setColumnView(0, 15);
			ws.setColumnView(1, 10);

			ws.setColumnView(2, 10);
			ws.setColumnView(3, 10);
			ws.setColumnView(4, 10);
			ws.setColumnView(5, 10);
			ws.setColumnView(6, 10);
			ws.setColumnView(7, 10);
			ws.setColumnView(8, 10);
			ws.setColumnView(9, 10);
			ws.setColumnView(10, 10);
			ws.setColumnView(11, 10);
			ws.setColumnView(12, 10);
			ws.setColumnView(13, 10);
			ws.setColumnView(14, 10);
			ws.setColumnView(15, 15);

			
			beginDate = request.getParameter("beginDate");
			endDate = request.getParameter("endDate");
			orgname = request.getParameter("orgname");
			
			
			
			data = createQuery( beginDate, endDate, orgname);
			for (int i = 0; i < data.size(); i++) {
				DynaBean dynaBean = (DynaBean)data.get(i);
				String orgname = StringUtil.parseNull( dynaBean.get("orgname")) ;
				String c_amount20 = StringUtil.parseNull( dynaBean.get("c_amount20"));
				String c_paymoney20 = StringUtil.parseNumber( dynaBean.get("c_paymoney20"));
				String c_amount25 = StringUtil.parseNull( dynaBean.get("c_amount25"));
				String c_paymoney25 = StringUtil.parseNumber( dynaBean.get("c_paymoney25"));
				String c_amount50 = StringUtil.parseNull( dynaBean.get("c_amount50"));
				String c_paymoney50 = StringUtil.parseNumber( dynaBean.get("c_paymoney50"));	
				String v_amount30 = StringUtil.parseNull( dynaBean.get("v_amount30"));
				String v_paymoney30 = StringUtil.parseNumber( dynaBean.get("v_paymoney30"));
				String v_amount50 = StringUtil.parseNull( dynaBean.get("v_amount50"));
				String v_paymoney50 = StringUtil.parseNumber( dynaBean.get("v_paymoney50"));
				String v_amount100 = StringUtil.parseNull( dynaBean.get("v_amount100"));
				String v_paymoney100 = StringUtil.parseNumber( dynaBean.get("v_paymoney100"));	
				String c_amountonline = StringUtil.parseNull( dynaBean.get("c_amountonline"));
				String c_paymoneyonline = StringUtil.parseNumber( dynaBean.get("c_paymoneyonline"));
				
				String totle = 
					StringUtil.parseNumber(Double.parseDouble(c_paymoney20)
						 + Double.parseDouble(c_paymoney25) 
						 + Double.parseDouble(c_paymoney50) 
						 + Double.parseDouble(v_paymoney30)
						 + Double.parseDouble(v_paymoney50) 
						 + Double.parseDouble(v_paymoney100) 
						 + Double.parseDouble(c_paymoneyonline));
			
				
				WritableCellFormat numberFormat = new WritableCellFormat();    
			     
  
				numberFormat.setAlignment(Alignment.RIGHT); 
				
				ws.addCell(new Label(0, i + 4, orgname));
				ws.addCell(new Label(1, i + 4, c_amount20,numberFormat));
				ws.addCell(new Label(2, i + 4, c_paymoney20,numberFormat));
				ws.addCell(new Label(3, i + 4, c_amount25,numberFormat));
				ws.addCell(new Label(4, i + 4, c_paymoney25,numberFormat));
				ws.addCell(new Label(5, i + 4, c_amount50,numberFormat));
				ws.addCell(new Label(6, i + 4, c_paymoney50,numberFormat));
				ws.addCell(new Label(7, i + 4, v_amount30,numberFormat));
				ws.addCell(new Label(8, i + 4, v_paymoney30,numberFormat));
				ws.addCell(new Label(9, i + 4, v_amount50,numberFormat));
				ws.addCell(new Label(10, i + 4,v_paymoney50,numberFormat));
				ws.addCell(new Label(11, i + 4,v_amount100,numberFormat));
				ws.addCell(new Label(12, i + 4,v_paymoney100,numberFormat));
				ws.addCell(new Label(13, i + 4,c_amountonline,numberFormat));
				ws.addCell(new Label(14, i + 4,c_paymoneyonline,numberFormat));
				ws.addCell(new Label(15, i + 4,totle,numberFormat));
			}

			wwb.write();
			wwb.close();

		}