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  • java POI导出excel表格

    1、异常java.lang.NoClassDefFoundError: org/apache/poi/UnsupportedFileFormatException

      解决方法:使用的poi的相关jar包一定版本一定要相同!!!!!

     2.引入jar包

    <!-- 导出excel -->
    <dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>3.9</version>
    </dependency>
    <dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.9</version>
    </dependency>

    3.设置工作簿
    //创建工作簿
    HSSFWorkbook workbook = new HSSFWorkbook()
    //添加工作簿名称
    HSSFSheet  sheet = workbook.createSheet("考勤统计");
    //创建单元格
    HSSFRow  row = sheet.createRow(0);
    //创建字体
    HSSFFont font = workbook.createFont();
     font.setFontHeight((short) 200);
    //创建样式
    HSSFCellStyle style = workbook.createCellStyle();
    //强制换行
    style.setWrapText(true);
    //添加字体
     style.setFont(font);
    
    //合并单元格(起始行,结束行,起始列,结束列)
    CellRangeAddress timeRegion = new CellRangeAddress(1, 2,0,0);
    sheet.addMergedRegion(timeRegion);
    //设置单元格内容
     timeCell.setCellValue("时间");
    

    4.下载表格

    HttpServletResponse response = servletRequestAttributes.getResponse();
            try {
                OutputStream out = response.getOutputStream();
                //设置格式 
                response.setCharacterEncoding("UTF-8");
                response.setContentType("application/ms-excel;charset=UTF-8");
                //设置请求头
                response.setHeader("Content-Disposition", "attachment;filename=".concat(String.valueOf(URLEncoder.encode(DateTimeUtil.getStartAndLastDayNumber(startDay, endDay) + ".xls", "UTF-8"))));
                response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
                //写入
                workbook.write(out);
                out.close();
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
    

      



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  • 原文地址:https://www.cnblogs.com/xiaoxiaoliu/p/10286257.html
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