java-导出excel操作

最近经常有用到导出excel的操作 ，所以就记录一下

用到的jar包是 jxl.jar  点击下载--jxl.jar

准备好这些之后 就是 查看代码了 例子：

	
import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.CellFormat;
import jxl.format.VerticalAlignment;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.WritableCell;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

	/**
	 * 根据时间导出excel模板信息
	 * @param request
	 * @param map
	 * @return
	 */
	@SuppressWarnings("deprecation")
	@RequestMapping("doExcelTemplate")
	@ResponseBody
	public ModelMap doExcelTemplate(HttpServletRequest request, ModelMap map) {
		try
		{
			File f=new File(request.getRealPath("/")+"excel/模板信息详情导出.xls");
			if(!f.exists())
			{
				f.createNewFile();
			}
			
			WritableWorkbook workbook = Workbook.createWorkbook(f);
			WritableSheet sheet = workbook.createSheet("模板信息详情导出",0);
			
			WritableFont wfHeader=new WritableFont(WritableFont.TIMES,14,WritableFont.BOLD);
			WritableCellFormat wcHeader=new WritableCellFormat(wfHeader);
			wcHeader.setAlignment(Alignment.CENTRE);
			wcHeader.setVerticalAlignment(VerticalAlignment.CENTRE);
			
			WritableFont wfCell=new WritableFont(WritableFont.TIMES,10,WritableFont.NO_BOLD);
			WritableCellFormat wcCell=new WritableCellFormat(wfCell);
			wcCell.setAlignment(Alignment.CENTRE);
			wcCell.setVerticalAlignment(VerticalAlignment.CENTRE);
			
			sheet.setRowView(0, 600);
			sheet.setColumnView(0, 10);
			sheet.setColumnView(1, 30);
			sheet.setColumnView(2, 30);
			
			Label lb;
			Number nb;
			lb=new Label(0,0,"id",wcHeader);
			sheet.addCell(lb);
			lb=new Label(1,0,"日期",wcHeader);
			sheet.addCell(lb);
			lb=new Label(2,0,"月份",wcHeader);
			sheet.addCell(lb);
			lb=new Label(3,0,"主题",wcHeader);
			sheet.addCell(lb);
			lb=new Label(4,0,"总人数",wcHeader);
			sheet.addCell(lb);
			lb=new Label(5,0,"PV",wcHeader);
			sheet.addCell(lb);
			lb=new Label(6,0,"UV",wcHeader);
			sheet.addCell(lb);
			lb=new Label(7,0,"打开率",wcHeader);
			sheet.addCell(lb);
			lb=new Label(8,0,"平均打开率",wcHeader);
			sheet.addCell(lb);
			
			String time = request.getParameter("time");
			List list = timingSendService.timingExecls(time);//查数据库数据
			
			int i=1;
			float count=0;
			for(WeixinTimingSend obj:list)
			{
					
				float PV = 10;//查询数据库
				float UV = 20;//查询数据库
					
				String times = obj.getSend_time().toString();
				String sendtime=times.substring(0,times.length() - 2);//发送时间

				String group="2";//月份分组

				String name = obj.getName();//主题

				float send_numbe=obj.getSend_numbe();//发送总人数
					
				float sum_uv=UV/send_numbe;
				DecimalFormat fnum=new  DecimalFormat("##0.00");  
				String sum=fnum.format(sum_uv); //打开率
					
				count=count+Float.parseFloat(sum);
					
				nb=new Number(0,i,i,wcCell);
				sheet.addCell(nb);
				lb=new Label(1,i,sendtime,wcCell);//发送时间
				sheet.addCell(lb);
				lb=new Label(2,i,group,wcCell);//月份
				sheet.addCell(lb);
				lb=new Label(3,i,name,wcCell);//主题
				sheet.addCell(lb);
				lb=new Label(4,i,send_numbe+"",wcCell);//发送总人数
				sheet.addCell(lb);
				lb=new Label(5,i,PV+"",wcCell);
				sheet.addCell(lb);
				lb=new Label(6,i,UV+"",wcCell);
				sheet.addCell(lb);
				lb=new Label(7,i,sum,wcCell);//打开率
				sheet.addCell(lb);
				lb=new Label(8,i,"0",wcCell);//平均打开率
				sheet.addCell(lb);
					
				i++;
			}
				float count_sum=count/list.size();
	        		DecimalFormat fnum  =   new  DecimalFormat("##0.00");  
				String countSum=fnum.format(count_sum); //平均打开率
			
		    //修改
	            WritableCell cell =sheet.getWritableCell(8, 1);//获取第一个单元格  
	            CellFormat cf = cell.getCellFormat();//获取第一个单元格的格式  
	            Label lbl = new Label(8, 1,countSum+"");//将第一个单元格的值改为“修改後的值”
	            lbl.setCellFormat(cf);//将修改后的单元格的格式设定成跟原来一样  
	            sheet.addCell(lbl);
	            
			//合并单元格，第一个参数：要合并的单元格最左上角的列号，//第二个参数：要合并的单元格最左上角的行号，
			//第三个参数：要合并的单元格最右角的列号，//第四个参数：要合并的单元格最右下角的行
			sheet.mergeCells(8, 1, 8, i-1);
			sheet.mergeCells(1, 1, 1, i-1);
	        workbook.write();
	        workbook.close();
			
			map.put("excelurl",request.getContextPath()+"/excel/模板信息详情导出.xls");
		}
		catch(Exception e)
		{
			logger.error("AdminRoleAction@_query error", e);
			sendFailureMessage(map, "系统内部错误.");
		}
		
		return map;
	}

然后我们再说说 jxl的修改和合并 ： 因为公司需求是要合并平均数，然后excel 合并 如果内容不一样只取第一个内容的值进行合并，所以我这里就是把第一个内容修改为自己最后算出的平均值，这样就完美解决了合并的问题。

float count_sum=count/list.size();
DecimalFormat fnum  =   new  DecimalFormat("##0.00");  
String countSum=fnum.format(count_sum); //平均打开率

//jxl 修改
 WritableCell cell =sheet.getWritableCell(8, 1);//获取需要修改的第几列 和第几行
 CellFormat cf = cell.getCellFormat();//获取第一个单元格的格式  
 Label lbl = new Label(8, 1,countSum+"");//将第一个单元格的值改为最新的值 我这里是 countSum 平均值
 lbl.setCellFormat(cf);//将修改后的单元格的格式设定成跟原来一样  
 sheet.addCell(lbl);//重新保存

//jxl 合并
//合并单元格，第一个参数：要合并的单元格最左上角的列号，//第二个参数：要合并的单元格最左上角的行号，
//第三个参数：要合并的单元格最右角的列号，//第四个参数：要合并的单元格最右下角的行

sheet.mergeCells(1, 1, 1, i-1); //这里的意思是 第一列的第一行 到第一列的N行 进行合并 （i根据自己的数据库数字进行改变）
sheet.mergeCells(8, 1, 8, i-1); //这里的意思是 第八列的第一行 到第八列的N行 进行合并 （i根据自己的数据库数字进行改变）

最后在附上项目上实际运用，与数据库进行交互的代码：

	
import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.CellFormat;
import jxl.format.VerticalAlignment;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.WritableCell;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

		/**
	 * 根据时间导出excel模板信息
	 * @param request
	 * @param map
	 * @return
	 */
	@SuppressWarnings("deprecation")
	@RequestMapping("doExcelTemplate")
	@ResponseBody
	public ModelMap doExcelTemplate(HttpServletRequest request, ModelMap map) {
		try
		{
			File f=new File(request.getRealPath("/")+"excel/模板信息详情导出.xls");
			if(!f.exists())
			{
				f.createNewFile();
			}
			
			WritableWorkbook workbook = Workbook.createWorkbook(f);
			WritableSheet sheet = workbook.createSheet("模板信息详情导出",0);
			
			WritableFont wfHeader=new WritableFont(WritableFont.TIMES,14,WritableFont.BOLD);
			WritableCellFormat wcHeader=new WritableCellFormat(wfHeader);
			wcHeader.setAlignment(Alignment.CENTRE);
			wcHeader.setVerticalAlignment(VerticalAlignment.CENTRE);
			
			WritableFont wfCell=new WritableFont(WritableFont.TIMES,10,WritableFont.NO_BOLD);
			WritableCellFormat wcCell=new WritableCellFormat(wfCell);
			wcCell.setAlignment(Alignment.CENTRE);
			wcCell.setVerticalAlignment(VerticalAlignment.CENTRE);
			
			sheet.setRowView(0, 600);
			sheet.setColumnView(0, 10);
			sheet.setColumnView(1, 30);
			sheet.setColumnView(2, 30);
			
			Label lb;
			Number nb;
			lb=new Label(0,0,"id",wcHeader);
			sheet.addCell(lb);
			lb=new Label(1,0,"日期",wcHeader);
			sheet.addCell(lb);
			lb=new Label(2,0,"月份",wcHeader);
			sheet.addCell(lb);
			lb=new Label(3,0,"主题",wcHeader);
			sheet.addCell(lb);
			lb=new Label(4,0,"总人数",wcHeader);
			sheet.addCell(lb);
			lb=new Label(5,0,"PV",wcHeader);
			sheet.addCell(lb);
			lb=new Label(6,0,"UV",wcHeader);
			sheet.addCell(lb);
			lb=new Label(7,0,"打开率",wcHeader);
			sheet.addCell(lb);
			lb=new Label(8,0,"平均打开率",wcHeader);
			sheet.addCell(lb);
			
			String time = request.getParameter("time");
			List list = timingSendService.timingExecls(time);
			
			int i=1;
			float count=0;
			for(WeixinTimingSend obj:list)
			{
					DxwGroup adminDxwGroup = dxwGroupService.findDxwGroupById(obj.getSend_group_id());
					WeixinTemplatePreset templatePreset = templatePresetService.findPresetPage(Integer.parseInt(obj.getSend_content_id()));
					
					long sqlLastTime = obj.getSend_time().getTime() / 1000;// 直接转换成long
					WeixinArticleStatistics articleStatistics = new WeixinArticleStatistics();
					articleStatistics.setTiming_time(String.valueOf(sqlLastTime));
					articleStatistics.setType(9);
					articleStatistics.setArticle_id(obj.getArticle_id());
					
					float PV = templatePresetService.findArtStatisticsPV(articleStatistics);
					float UV = templatePresetService.findArtStatisticsUV(articleStatistics);
					
					String times = obj.getSend_time().toString();
					String sendtime=times.substring(0,times.length() - 2);//发送时间
					
					String group=null;//月份分组
					if(adminDxwGroup!=null)
					{
						group=adminDxwGroup.getName();
					}
					String name = templatePreset.getName();//主题
					float send_numbe=obj.getSend_numbe();//发送总人数
					
					float sum_uv=UV/send_numbe;
					DecimalFormat fnum  =   new  DecimalFormat("##0.00");  
					String sum=fnum.format(sum_uv); //打开率
					
					count=count+Float.parseFloat(sum);
					
					nb=new Number(0,i,i,wcCell);
					sheet.addCell(nb);
					lb=new Label(1,i,sendtime,wcCell);//发送时间
					sheet.addCell(lb);
					lb=new Label(2,i,group,wcCell);//月份
					sheet.addCell(lb);
					lb=new Label(3,i,name,wcCell);//主题
					sheet.addCell(lb);
					lb=new Label(4,i,send_numbe+"",wcCell);//发送总人数
					sheet.addCell(lb);
					lb=new Label(5,i,PV+"",wcCell);
					sheet.addCell(lb);
					lb=new Label(6,i,UV+"",wcCell);
					sheet.addCell(lb);
					lb=new Label(7,i,sum,wcCell);//打开率
					sheet.addCell(lb);
					lb=new Label(8,i,"0",wcCell);//平均打开率
					sheet.addCell(lb);
					
					i++;
			}
				float count_sum=count/list.size();
	        	DecimalFormat fnum  =   new  DecimalFormat("##0.00");  
				String countSum=fnum.format(count_sum); //平均打开率
			
				//修改
	            WritableCell cell =sheet.getWritableCell(8, 1);//获取第一个单元格  
	            CellFormat cf = cell.getCellFormat();//获取第一个单元格的格式  
	            Label lbl = new Label(8, 1,countSum+"");//将第一个单元格的值改为“修改後的值”
	            lbl.setCellFormat(cf);//将修改后的单元格的格式设定成跟原来一样  
	            sheet.addCell(lbl);
	            
			//合并单元格，第一个参数：要合并的单元格最左上角的列号，//第二个参数：要合并的单元格最左上角的行号，
			//第三个参数：要合并的单元格最右角的列号，//第四个参数：要合并的单元格最右下角的行
			sheet.mergeCells(8, 1, 8, i-1);
			sheet.mergeCells(1, 1, 1, i-1);
	        workbook.write();
	        workbook.close();
			
			map.put("excelurl",request.getContextPath()+"/excel/模板信息详情导出.xls");
		}
		catch(Exception e)
		{
			logger.error("AdminRoleAction@_query error", e);
			sendFailureMessage(map, "系统内部错误.");
		}
		
		return map;
	}

 结果如下：

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