JXLS模板导出EXCEL

JXLS模板导出EXCEL

   最近做要做一些报表导出的功能，由于表格内容比较复杂，直接生成excel比较麻烦，所以采用模板的方式来做，可惜自己不了解，也证明了自己技术有多差！通过多次资料，终于找到了适合自己的方法。特此记录，方便以后查找。

   maven用到的包

    net.sf.jxls
    jxls-core
    1.0 . 6


    net.sf.jxls
    jxls-reader
    1.0 . 6

Service代码

public  void  exportChargeCount(String yearMonth, String buildId, HttpServletRequest request,HttpServletResponse response)
    {
        String templateFile = request.getSession().getServletContext().getRealPath( "/" )+ "/doc/reportTmp/billingInfo.xls" ;
        Date date = BillingDateUtil.getBillingEndTime(Integer.valueOf(yearMonth.substring( 0 ,  4 )),Integer.valueOf(yearMonth.substring( 5 ,  7 )));
        String buildName = dataCenter.getBuildInfoById(buildId).getBuildName();
        String fileName = buildName+ "(" +yearMonth+ ")客户汇总报表.xls" ;
        List list =   this .reportDao.getChargeCount(DateUtil.getFormatNormal(date), buildId);
        Map context =  new  HashMap<>();
        XLSTransformer transformer =  new  XLSTransformer();

        float  sumMoney =  0 ;
        for  (ChargeCountVO chargeCountVO : list) {
            sumMoney += chargeCountVO.getEnergyMoney();
        }

        context.put( "billingList" , list);
        context.put( "sumMoney" , sumMoney);
        context.put( "billingDate" , yearMonth);
        context.put( "buildName" ,buildName );

        try  {
            response.setContentType( "application/vnd.ms-excel" );
            response.setHeader( "Content-disposition" ,  "attachment;filename=" + new  String( fileName.getBytes( "GBK" ),  "ISO8859-1"  ));
            Workbook workbook =  transformer.transformXLS( new  FileInputStream(templateFile), context);
            OutputStream ouputStream = response.getOutputStream();
            workbook.write(ouputStream);
            ouputStream.flush();
            ouputStream.close();
        }  catch  (ParsePropertyException e) {
            e.printStackTrace();
        }  catch  (InvalidFormatException e) {
            e.printStackTrace();
        }  catch  (IOException e) {
            e.printStackTrace();
        }
    }

采用键值对的形式

xls模板

导出效果

大家可能会遇到的问题

1、web下载中文名称不显示的问题

2、模板使用公式，下载下来不计算的问题

3、合并单元格的问题

下面逐一解答

1、中文字符转码

response.setHeader( "Content-disposition" ,  "attachment;filename=" + new  String( fileName.getBytes( "GBK" ),  "ISO8859-1"  ));

2、重新加载模板公式(通用方法)

 /**
     *
     * 重新设置单元格计算公式
     *
     * */
    private  void  resetCellFormula(HSSFWorkbook wb)
    {
        HSSFFormulaEvaluator e =  new  HSSFFormulaEvaluator(wb);
        int  sheetNum = wb.getNumberOfSheets();
        for  ( int  i =  0 ; i < sheetNum; i++)
        {
            HSSFSheet sheet = wb.getSheetAt(i);
            int  rows = sheet.getLastRowNum() +  1 ;
            for  ( int  j =  0 ; j < rows; j++)
            {
                HSSFRow row = sheet.getRow(j);
                if  (row ==  null )
                    continue ;
                int  cols = row.getLastCellNum();
                for  ( int  k =  0 ; k < cols; k++)
                {
                    HSSFCell cell = row.getCell(k);
                    // if (cell != null)
                    // System.out.println("cell["+j+","+k+"]=:"+cell.getCellType());
                    if  (cell ==  null )
                        continue ;
                    if  (cell.getCellType() == HSSFCell.CELL_TYPE_FORMULA)
                    {
                        cell.setCellFormula(cell.getCellFormula());
                        // System.out.println("----公式："+cell.getCellFormula());
                        cell = e.evaluateInCell(cell);
                        // System.out.println("-----------"+cell.getNumericCellValue());
                    }
                }
            }
        }
    }

使用方法

3、合并单元格

HSSFWorkbook  workbook = (HSSFWorkbook )transformer.transformXLS( new  FileInputStream(templateFile), context);
HSSFSheet sheet = workbook.getSheetAt( 0 );
sheet.addMergedRegion( new  CellRangeAddress(起始行号,截至行号,起始列号,截至列号));

四个参数均从0开始