数据库导出数据到Excel表

• 导入所需依赖

      
           org.apache.poi
           poi
           3.14
       
       
           org.apache.poi
           poi-ooxml
           3.14
       

• 前端代码

	
代理列表
导出表格

/*导出数据*/
		function exOut() {

			var schoolName = $("#sch_fx").val();
			var city = $("#input_city").val();
			var school = $("#input_school").val();
			var subject = $("#input_subject").val();
			var name = $("#input_name").val();
			var telNumber = $("#input_tel").val();
			var grade = $("#grade").val();
			var onTime = $("#onTime").val();
			var offTime = $("#offTime").val();

			window.location = "../sys/exportOut?schoolName="+schoolName+"&city="+city+"&school="+school+"&subject="+subject+"&name="+name+"&telNumber="+telNumber+"&grade="+grade+"&onTime="+onTime+"&offTime="+offTime;
		}

• 后台代码

@RequestMapping(value = "/exportOut")
    public void exportOut(Model model, String schoolName, String name, String city, String school, String subject, String grade, String telNumber, String onTime, String offTime, HttpServletRequest request, HttpServletResponse response){

        List> list = new ArrayList<>();
        StuData stuData = new StuData(name,city,school,subject,grade,telNumber,null,schoolName,onTime,offTime);//封装查询条件
        //调用service查询所有数据,传的是一个对象,需要封装一个实体类.,返回一个list
        List listAll = schoolZPService.findAll(stuData);
        //遍历集合,拿到集合中的每一个数据,封装到map中
        for (StuData data : listAll) {
            Map map = new HashMap<>();
            map.put("分校名称",data.getSchoolName());
            map.put("代理姓名",data.getName());
            map.put("所在城市",data.getCity());
            map.put("就读高校",data.getSchool());
            map.put("就读专业",data.getSubject());
            map.put("年级",data.getGrade());
            map.put("电话号码",data.getTelNumber());
            map.put("申请时间",data.getTime());

            list.add(map);
        }
		//把表头封装到list集合中
        List headList = new ArrayList<>();
        headList.add("分校名称");
        headList.add("代理姓名");
        headList.add("所在城市");
        headList.add("就读高校");
        headList.add("就读专业");
        headList.add("年级");
        headList.add("电话号码");
        headList.add("申请时间");
		//调用工具类,传入文件名,表头集合,数据集合,request和response
        ExportExcel.exportExcel("代理资料",headList,list,request,response);

    }

• 工具类

 /**
     * 
     * @param sheetName 工作表的名字
     * @param column  列名
     * @param data  需要导出的数据    ( map的键定义为列的名字 一定要和column中的列明保持一致  )
     * @param response
     */
    public static void exportExcel(String sheetName, List column, List> data, HttpServletRequest request, HttpServletResponse response){
    	//创建工作薄
		HSSFWorkbook hssfWorkbook = new HSSFWorkbook();
		//创建sheet
		HSSFSheet sheet = hssfWorkbook.createSheet(sheetName);
		// 表头
		Row headRow = sheet.createRow(0);
		for (int i = 0; i < column.size(); i++){
			headRow.createCell(i).setCellValue(column.get(i));
		}
		
		for (int i = 0; i < data.size(); i++) {
			Row dataRow = sheet.createRow(sheet.getLastRowNum() + 1);
			for (int x = 0; x < column.size(); x++) {
				dataRow.createCell(x).setCellValue(data.get(i).get(column.get(x))==null?"":data.get(i).get(column.get(x)).toString());
			}
		}
			
			
		
		response.setContentType("application/vnd.ms-excel");
		
		try {
			   //获取浏览器名称
			   String agent=request.getHeader("user-agent");
			   String filename=sheetName+".xls";
			   //不同浏览器需要对文件名做特殊处理
			   if (agent.contains("Firefox")) { // 火狐浏览器
			    filename = "=?UTF-8?B?"
			      + new BASE64Encoder().encode(filename.getBytes("utf-8"))
			      + "?=";
			    filename = filename.replaceAll("\r\n", "");
			   } else { // IE及其他浏览器
			    filename = URLEncoder.encode(filename, "utf-8");
			    filename = filename.replace("+"," ");
			   }
			   //推送浏览器
			   response.setHeader("Content-Disposition","attachment;filename="+filename);
			   hssfWorkbook.write(response.getOutputStream());
			  } catch (Exception e) {
			   // TODO Auto-generated catch block
			   e.printStackTrace();
			  }
    }

注意:如果从前端传输数据到后台或者请求后台的时候,尽量不要使用ajax提交,容易出问题,使用window.location提交应该就不会出现各种问题.