从easyui页面导出excel

这里我主要讲EasyUI内，通过button出发onClick()事件，把日期传入后台，由SpringMVC处理，导出excel

要求：根据分拣开始时间和完成分拣时间，导出对应的数据

一：easyui添加的button

toolbar :{
                    text : '导出分拣信息',
                    iconCls : 'icon-print',
                    handler : function() {
                        exportSortingOrder();
                    }
 }

二：导出时间不能超过5天，因为数据量过大，以下是js逻辑

function exportSortingOrder(){
   			var startDate = $("input[name=startDate]").val();
   			var endDate = $("input[name=endDate]").val();
   			var iDays = getDays(startDate,endDate); 
   			if(iDays>5){
   				alert("不能导出超过5天的数据!");
   				return false;
   			}else if(iDays > 0 && iDays <=5){
   				window.location.href=ctx+".../...?startDate="+startDate+"&endDate="+endDate;
   			}
   		}
   		function getDays(sd,ed){
   			if((sd == "" || sd == null) || (ed =="" || ed == null)){
   		    	alert("请选择开始分拣时间或结束分拣时间！");
   		    }else{
   		    	var year = parseInt(sd.substring(0,4));
   		    	var sMonth = parseInt(sd.substring(5,7));
   		    	var eMonth = parseInt(ed.substring(5,7));
   		    	var strDateS = new Date(sd.substring(0,4),sd.substring(5,7),sd.substring(8,10),sd.substring(11,13),sd.substring(14,16),sd.substring(17,19));
   	   			var endDateE = new Date(ed.substring(0,4),ed.substring(5,7),ed.substring(8,10),ed.substring(11,13),ed.substring(14,16),ed.substring(17,19));
   	   			if(strDateS > endDateE){
   		    		alert("结束时间不能在开始时间之前！"); 
   		    	}else{
   		    		var iDays = parseInt((endDateE - strDateS ) / 1000 / 60 / 60 /24);
   		    		if(sMonth == eMonth){
		    			return iDays;
	   		    	}else{
	   		    		if(sMonth==1 || sMonth==3 ||sMonth==5||sMonth==7||sMonth==8||sMonth==10||sMonth==12){
	   	   		    		iDays += 1;	
	   	   		    	}else if(sMonth==2){
	   	   		    		if((year%4==0 && year%100!=0)||(year%100==0 && year%400==0)){
	   	   		    			iDays -= 2;
	   	   	   		    	}else{
	   	   	   		    		iDays -= 3;
	   	   	   		    	}
	   	   		    	}
	   		    	} 
   		    		return iDays;
   		    	}
   		    } 
   		}

三：后台处理

package com.genye.sorter.warehouse.action;

@RequestMapping(value = "/exportSortingOrder",method = RequestMethod.GET)
    public void exportSortingOrder(HttpServletRequest request,HttpServletResponse response) throws IOException{
    	String parttern = DateUtil.DATETIME_FORMAT;
    	Date startDate = DateUtil.StringToDate(request.getParameter("startDate"), parttern);
    	Date endDate = DateUtil.StringToDate(request.getParameter("endDate"), parttern);
    	XSSFWorkbook wb = sortingOrderService.exportSortingOrder(startDate,endDate);        
        String[] sds = request.getParameter("startDate").split("\\s");
        String[] eds = request.getParameter("endDate").split("\\s");
        StringBuffer fileName=new StringBuffer("attachment;filename=");
        fileName.append(sds[0]).append("_").append(eds[0]).append("_").append(new Date().getTime()).append(".xlsx");        
        response.setContentType("application/ms-excel");
        response.setHeader("Content-disposition",fileName.toString());
        OutputStream outputStream = response.getOutputStream();
        wb.write(outputStream);
        outputStream.flush();
        outputStream.close();   	
    	
    }

技术点：1.项目开发过程中，考虑到数据量很大，需要使用2007版的excel

2.在Http协议消息头中，使用Content-Type来表示具体请求中的媒体类型信息。

类型格式：type/subtype(;parameter)? type
主类型，任意的字符串，如text，如果是*号代表所有；
subtype 子类型，任意的字符串，如html，如果是*号代表所有；
parameter 可选，一些参数，如Accept请求头的q参数， Content-Type的 charset参数。

    3.已知MIME 类型的文件（比如：*.gif;*.txt;*.htm）能够在访问时弹出“文件下载”对话框,希望文件直接在浏览器上显示而不是弹出文件下载对话框

Response.AddHeader ("Content-disposition",fileName.toString())

4.注意：设置文件名的时候，出现中文或者空格，转换失败

解决办法：

response.setHeader( “Content-Disposition”, “attachment;filename=” + new String( fileName.getBytes(”gb2312″), “ISO8859-1″ ) );

5.导出excel

public XSSFWorkbook exportSortingOrder(Date startDate, Date endDate) {
		String[] excelHeader = { "分拣单号", "分配订单数", "订单总数", "订单完成数", "商品数", "分拣数", "创建时间", "分拣状态", "开始分拣时间", "最后分拣时间",
				"完成分拣时间" };
		List<SortingOrderVo> lists = sortingOrderMapperCustom.listsortingOrderByDate(startDate, endDate);
		XSSFWorkbook wb = new XSSFWorkbook();
		XSSFSheet sheet1 = wb.createSheet("商品记录");
		// 设置style
		XSSFCellStyle headStyle = wb.createCellStyle();
		XSSFFont font = wb.createFont();
		font.setFontHeightInPoints((short) 23);
		headStyle.setFont(font);
		headStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		headStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直
		XSSFCellStyle style = wb.createCellStyle();
		style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直
		for (int i = 0; i < excelHeader.length; i++) {
			sheet1.setDefaultColumnStyle(i, style);
		}
		XSSFRow row0 = sheet1.createRow(0);
		for (int i = 0; i < excelHeader.length; i++) {
			XSSFCell cell = row0.createCell(i);
			cell.setCellValue(excelHeader[i]);
			cell.setCellStyle(style);
			sheet1.setColumnWidth(i, 5000);
		}

		XSSFRow row;
		XSSFCell cell;
		SortingOrderVo sortingOrderVo;
		XSSFDataFormat format = wb.createDataFormat();
		style.setDataFormat(format.getFormat("yyyy-mm-dd hh:mm:ss"));
		for (int i = 0; i < lists.size(); i++) {
			row = sheet1.createRow(i + 1);
			sortingOrderVo = lists.get(i);
			int state = sortingOrderVo.getState();
			row.createCell(0).setCellValue(sortingOrderVo.getSortingOrderNo());
			row.createCell(1).setCellValue(sortingOrderVo.getOrderCount());
			row.createCell(2).setCellValue(sortingOrderVo.getAllotCount());
			row.createCell(3).setCellValue(sortingOrderVo.getFinishCount());
			row.createCell(4).setCellValue(sortingOrderVo.getItemAmount());
			row.createCell(5).setCellValue(sortingOrderVo.getItemAmountFinish());
			cell = row.createCell(6);
			cell.setCellValue(sortingOrderVo.getCreateDate());
			cell.setCellStyle(style);
			switch (state) {
			case 0:
				row.createCell(7).setCellValue("未开始分拣");
				break;
			case 1:
				row.createCell(7).setCellValue("分拣中");
				break;
			case 2:
				row.createCell(7).setCellValue("完成分拣");
				break;
			default:
				row.createCell(7).setCellValue("");
				break;
			}
			cell = row.createCell(8);
			cell.setCellValue(sortingOrderVo.getStartSortingDate());
			cell.setCellStyle(style);
			cell = row.createCell(9);
			cell.setCellValue(sortingOrderVo.getLastSortingDate());
			cell.setCellStyle(style);
			cell = row.createCell(10);
			cell.setCellValue(sortingOrderVo.getFinishDate());
			cell.setCellStyle(style);
		}
		return wb;
	}

问题：导出excel过程中，对于date类型数据，变成了4324.32，需要转换date

解决办法：

XSSFCellStyle style = wb.createCellStyle();
XSSFDataFormat format = wb.createDataFormat();
style.setDataFormat(format.getFormat("yyyy-mm-dd hh:mm:ss"));
cell.setCellValue(sortingOrderVo.getCreateDate());
cell.setCellStyle(style);

三：实现效果

从easyui页面导出excel

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