Easyexcel single sheet and multi sheet writing

• single sheet Page write out

    private static List<DataTemplate> data() {
    
        return data(10);
    }

    private static List<DataTemplate> data(int size) {
    
        List<DataTemplate> list = new ArrayList<>();
        for (int i = 0; i < size; i++) {
    
            DataTemplate data = new DataTemplate();
            data.setMoney(i + 0.111);
            data.setDate(new Date());
            data.setValue(i + 0.111);
            data.setUserid("userid " + i);
            list.add(data);
        }
        return list;
    }

  public static void main(String[] args) {
    
        String fileName = "D:\\Users\\lvhb\\Desktop\\templatewrite.xlsx";
        EasyExcel.write(fileName, DataTemplate.class).sheet(" Templates ").doWrite(data());
    }

single sheet There is no problem exporting pages

• many sheet Page export

   @Test
    public void test3(){
    
        String fileName = "D:\\Users\\lvhb\\Desktop\\templatewrite.xlsx";
        ExcelWriter excelWriter = EasyExcel.write(fileName).head(DataTemplate.class).build();
        WriteSheet writeSheet = EasyExcel.writerSheet(0,"11").build();
        excelWriter.write(data(10),writeSheet);
        writeSheet = EasyExcel.writerSheet(1,"22").build();
        excelWriter.write(data(20),writeSheet);
    }

At this point, you may encounter file generation problems

It needs to be adjusted at this time excelWriter.finish() Method to write out all the data in the buffer .

 excelWriter.finish();

• web download

    @ResponseBody
    @GetMapping("exportSheet")
    public void exportSheet(HttpServletResponse response) throws Exception {
    
        response.setContentType("application/force-download");//  Set force download not to open 
// response.setContentType("application/octet-stream");
        response.setCharacterEncoding("UTF-8");
        String filename = URLEncoder.encode(" Export data ", "UTF-8");
        response.setHeader("Content-Disposition", "attachment; filename="+filename+".xlsx");// Pop up the download form 
        ServletOutputStream os = response.getOutputStream();
        ExcelWriter excelWriter = EasyExcel.write(os).head(DataTemplate.class).build();
        WriteSheet writeSheet = EasyExcel.writerSheet(0,"11111").build();
        excelWriter.write(data(10),writeSheet);
        writeSheet = EasyExcel.writerSheet(1,"2222222").build();
        excelWriter.write(data(20),writeSheet);
        excelWriter.finish();
        os.close();
    }