Java 엑셀 라이브러리를 활용하여 날짜 값 통으로 출력하기 예시

/* 엑셀 다운로드 */
@SuppressWarnings("unchecked")  
@RequestMapping(folderPath + "excelDown.do")      
public ModelAndView excelDown(@ModelAttribute("searchVO") CmmnDefaultVO searchVO, ModelMap model) throws Exception{

    ModelAndView mav = new ModelAndView(excelView);  

    /* 제목 URL 셋팅 */            
    String tit = "통계자료";         
    String url = "totalStatistics.xlsx";  

    String time = ""; // 기간   

    /* default 날짜 값 설정  */            
    String year = searchVO.getExcelYear();       
    String nowDay = DateUtils.getNowDate("dd");   
    String month = searchVO.getExcelMonth();

    /* 날짜 포멧 */    
    if(!"ALL".equals(searchVO.getExcelMonth()) && Integer.parseInt(month) < 10){
        month = "0" + month;   
        searchVO.setExcelMonth(month);
    }

    /* 날짜 설정 */
    if("ALL".equals(searchVO.getExcelMonth())){      

        time = year + "년";
    }else{   
        time = year + "년" + month + "월"  + "01일 ~" + year + "년" + month + "월" + nowDay + "일";
    }

    /* 조회 할 날짜 값 셋팅 */                                       
    searchVO.setSchEtc01(searchVO.getExcelYear()+"."+month); 

    /* 월 : 전체 검색 시 날짜 값 셋팅 */   
    if("ALL".equals(searchVO.getExcelMonth())){ 
        searchVO.setSchEtc01(searchVO.getExcelYear());  
    }           


    /* 엑셀 통계 조회 */      
    List<St01VO> eatLst = (List<St01VO>) cmmnService.selectList(searchVO, PROGRAM_ID + ".excelEatLogSelectList");
    List<St01VO> overTimeLst  = (List<St01VO>) cmmnService.selectList(searchVO, PROGRAM_ID + ".excelOverTimeSelectList");
    St01VO eatLog = (St01VO) cmmnService.selectContents(searchVO, PROGRAM_ID + ".statisticsEatLogExcelDown" );
    St01VO overTime = (St01VO) cmmnService.selectContents(searchVO, PROGRAM_ID + ".statisticsOverTimeExcelDown" );

    /* 값 담아주기 key : value */     
    mav.addObject("target", tit);        
    mav.addObject("source", url);
    mav.addObject("time", time);  
    mav.addObject("eatLst", eatLst);
    mav.addObject("overTimeLst", overTimeLst);  
    mav.addObject("overTime", overTime);
    mav.addObject("eatLog", eatLog);      





    return mav;
}

1. String time 변수 선언

2. 계산된 날짜 값 + 포멧 형태에 맞추어 출력