JavaWeb에서 excel 파일을 내보내는 간단한 방법

평소에 시스템 프로젝트를 할 때 excel을 내보내든 cvs 파일을 내보내든 내보내는 기능이 자주 필요합니다.내 아래의 데모는springmvc의 프레임워크에서 이루어진 것이다.
1.JS에서는 GET 모드로만 내보내기를 요청하면 됩니다.

$('#word-export-btn').parent().on('click',function(){
		var promotionWord = JSON.stringify($('#mainForm').serializeObject());
		location.href="${ctx}/promotionWord/export?promotionWord="+promotionWord; 
});

2. controller에서 할 일은 파일을 데이터 흐름 형식으로 출력하는 것이다.

  @RequestMapping("/export")
  public void export(HttpSession session, String promotionWord, HttpServletRequest request, HttpServletResponse response) throws IOException {
    User sessionUser = (User) session.getAttribute("user");
    JSONObject jsonObj = JSONObject.parseObject(promotionWord);
    HSSFWorkbook wb = promotionWordService.export(sessionUser.getId(), jsonObj);
    response.setContentType("application/vnd.ms-excel");
    Calendar cal = Calendar.getInstance();
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    String fileName = "word-" + sdf.format(cal.getTime()) + ".xls";
    response.setHeader("Content-disposition", "attachment;filename=" + fileName);
    OutputStream ouputStream = response.getOutputStream();
    wb.write(ouputStream);
    ouputStream.flush();
    ouputStream.close();
  }

3. 서비스에서 형식 파일에 데이터를 써야 합니다.

public HSSFWorkbook export(String userId, JSONObject jsonObj) {
HSSFWorkbook wb = new HSSFWorkbook(); 
HSSFSheet sheet = wb.createSheet("word"); 
HSSFRow row = sheet.createRow(0);
    HSSFCellStyle style = wb.createCellStyle(); 
    style.setAlignment(HSSFCellStyle.ALIGN_CENTER); 
List<PromotionWord> pWordList;
Map<String, Object> map = new HashMap<>();
map.put("userId", userId);
map.put("checkExistRule", jsonObj.getString("checkExistRule"));
map.put("status", jsonObj.getString("status"));
map.put("qsStar", jsonObj.getString("qsStar"));

map.put("impressionCount", jsonObj.getString("impressionCount"));

map.put("selectGroupId", jsonObj.getString("selectGroupId"));
map.put("isCheck", jsonObj.getString("isCheck"));
map.put("word", jsonObj.getString("word"));

Long impression = jsonObj.getLong("impressionCount");
Long click = jsonObj.getLong("clickCount");
if(impression != null){
PromotionWord word = new PromotionWord();
word.setCreatedBy(userId);
word.setImpressionCount7(impression);
pWordList = getTwentyPercentlists(word);
if(pWordList != null && pWordList.size() > 0){
map.put("impressionCount", pWordList.get(pWordList.size()-1).getImpressionCount());
}else{
map.put("impressionCount", 1);
}
}else if(click != null){
PromotionWord word = new PromotionWord();
word.setCreatedBy(userId);
word.setClickCount7(click);
pWordList = getTwentyPercentlists(word);
if(pWordList != null && pWordList.size() > 0){
map.put("clickCount", pWordList.get(pWordList.size()-1).getClickCount());
}else{
map.put("clickCount", 1);
}
}

List<PromotionWord> list = commonDao.queryList(PROMOTION_WORD_DAO + ".queryExportDataByUser", map);


String[] excelHeader = {" ", " "," "," "," "," "," "," "," "," "," "," "," "," "};
for (int i = 0; i < excelHeader.length; i++) { 
      HSSFCell cell = row.createCell(i); 
      cell.setCellValue(excelHeader[i]); 
      cell.setCellStyle(style); 
      if(i == 0){
      sheet.setColumnWidth(0, 30*256);
      }else{      
      sheet.setColumnWidth(i, 10*256);
      }
    } 
if(list != null && list.size() > 0)
for (int i = 0; i < list.size(); i++) { 
      row = sheet.createRow(i + 1); 
      PromotionWord word = list.get(i); 
      row.createCell(0).setCellValue(word.getWord()); 
      row.createCell(1).setCellValue(word.getPrice()+""); 
      row.createCell(2).setCellValue(word.getSearchCount());
      row.createCell(3).setCellValue(word.getQsStar());
      row.createCell(4).setCellValue(word.getBuyCount());
      row.createCell(5).setCellValue(word.getImpressionCount7());
      row.createCell(6).setCellValue(word.getClickCount7());
      if(word.getClickCount7() == 0L){
      row.createCell(7).setCellValue("0.00%");
      }else{
      DecimalFormat df = new DecimalFormat("0.00%");
      row.createCell(7).setCellValue(df.format((Double.valueOf(word.getClickCount7())/Double.valueOf(word.getImpressionCount7()))));
      }
      row.createCell(8).setCellValue(word.getOnlineTime7());
      row.createCell(9).setCellValue(word.getCost7()+"");
      row.createCell(10).setCellValue(word.getAvgCost7()+"");
      row.createCell(11).setCellValue(word.getMatchCount());
      String rank = "";
      if(word.getMatchCount() != null && word.getMatchCount() != 0){
      if(word.getProspectRank() == null || word.getProspectRank() == 0L){       
       rank = " ";
       }else{
       rank = " "+word.getProspectRank()+" ";
       }
      }else{
      rank = "---";
      }
      
      row.createCell(12).setCellValue(rank);
      row.createCell(13).setCellValue(word.getStatus() == 1 ?" ":" ");
    } 

return wb;
}

이렇게 하면 바로 클릭해서 내보내면 효과가 있습니다.
지금까지 여러분에게 가져온 JavaWeb에서 excel 파일을 내보내는 간단한 방법의 모든 내용입니다. 많은 응원 부탁드립니다~