POI的使用实例说明

关于POI的介绍请google一下!

 

public ActionResult excelPrint() {
    HSSFWorkbook workbook = new HSSFWorkbook();// 创建一个Excel文件
    HSSFSheet sheet = workbook.createSheet();// 创建一个Excel的Sheet
    sheet.createFreezePane(1, 3);// 冻结
    // 设置列宽
    sheet.setColumnWidth(0, 1000);
    sheet.setColumnWidth(1, 3500);
    sheet.setColumnWidth(2, 3500);
    sheet.setColumnWidth(3, 6500);
    sheet.setColumnWidth(4, 6500);
    sheet.setColumnWidth(5, 6500);
    sheet.setColumnWidth(6, 6500);
    sheet.setColumnWidth(7, 2500);
    // Sheet样式
    HSSFCellStyle sheetStyle = workbook.createCellStyle();
    // 背景色的设定
    sheetStyle.setFillBackgroundColor(HSSFColor.GREY_25_PERCENT.index);
    // 前景色的设定
    sheetStyle.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);
    // 填充模式
    sheetStyle.setFillPattern(HSSFCellStyle.FINE_DOTS);
    // 设置列的样式
    for (int i = 0; i <= 14; i++) {
      sheet.setDefaultColumnStyle((short) i, sheetStyle);
    }
    // 设置字体
    HSSFFont headfont = workbook.createFont();
    headfont.setFontName("黑体");
    headfont.setFontHeightInPoints((short) 22);// 字体大小
    headfont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 加粗
    // 另一个样式
    HSSFCellStyle headstyle = workbook.createCellStyle();
    headstyle.setFont(headfont);
    headstyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 左右居中
    headstyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 上下居中
    headstyle.setLocked(true);
    headstyle.setWrapText(true);// 自动换行
    // 另一个字体样式
    HSSFFont columnHeadFont = workbook.createFont();
    columnHeadFont.setFontName("宋体");
    columnHeadFont.setFontHeightInPoints((short) 10);
    columnHeadFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
    // 列头的样式
    HSSFCellStyle columnHeadStyle = workbook.createCellStyle();
    columnHeadStyle.setFont(columnHeadFont);
    columnHeadStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 左右居中
    columnHeadStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 上下居中
    columnHeadStyle.setLocked(true);
    columnHeadStyle.setWrapText(true);
    columnHeadStyle.setLeftBorderColor(HSSFColor.BLACK.index);// 左边框的颜色
    columnHeadStyle.setBorderLeft((short) 1);// 边框的大小
    columnHeadStyle.setRightBorderColor(HSSFColor.BLACK.index);// 右边框的颜色
    columnHeadStyle.setBorderRight((short) 1);// 边框的大小
    columnHeadStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); // 设置单元格的边框为粗体
    columnHeadStyle.setBottomBorderColor(HSSFColor.BLACK.index); // 设置单元格的边框颜色
    // 设置单元格的背景颜色(单元格的样式会覆盖列或行的样式)
    columnHeadStyle.setFillForegroundColor(HSSFColor.WHITE.index);

    HSSFFont font = workbook.createFont();
    font.setFontName("宋体");
    font.setFontHeightInPoints((short) 10);
    // 普通单元格样式
    HSSFCellStyle style = workbook.createCellStyle();
    style.setFont(font);
    style.setAlignment(HSSFCellStyle.ALIGN_LEFT);// 左右居中
    style.setVerticalAlignment(HSSFCellStyle.VERTICAL_TOP);// 上下居中
    style.setWrapText(true);
    style.setLeftBorderColor(HSSFColor.BLACK.index);
    style.setBorderLeft((short) 1);
    style.setRightBorderColor(HSSFColor.BLACK.index);
    style.setBorderRight((short) 1);
    style.setBorderBottom(HSSFCellStyle.BORDER_THIN); // 设置单元格的边框为粗体
    style.setBottomBorderColor(HSSFColor.BLACK.index); // 设置单元格的边框颜色.
    style.setFillForegroundColor(HSSFColor.WHITE.index);// 设置单元格的背景颜色.
    // 另一个样式
    HSSFCellStyle centerstyle = workbook.createCellStyle();
    centerstyle.setFont(font);
    centerstyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 左右居中
    centerstyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 上下居中
    centerstyle.setWrapText(true);
    centerstyle.setLeftBorderColor(HSSFColor.BLACK.index);
    centerstyle.setBorderLeft((short) 1);
    centerstyle.setRightBorderColor(HSSFColor.BLACK.index);
    centerstyle.setBorderRight((short) 1);
    centerstyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); // 设置单元格的边框为粗体
    centerstyle.setBottomBorderColor(HSSFColor.BLACK.index); // 设置单元格的边框颜色.
    centerstyle.setFillForegroundColor(HSSFColor.WHITE.index);// 设置单元格的背景颜色.

    try {
      // 创建第一行
      HSSFRow row0 = sheet.createRow(0);
      // 设置行高
      row0.setHeight((short) 900);
      // 创建第一列
      HSSFCell cell0 = row0.createCell(0);
      cell0.setCellValue(new HSSFRichTextString("中非发展基金投资项目调度会工作落实情况对照表"));
      cell0.setCellStyle(headstyle);
      /**
       * 合并单元格
       *    第一个参数:第一个单元格的行数(从0开始)
       *    第二个参数:第二个单元格的行数(从0开始)
       *    第三个参数:第一个单元格的列数(从0开始)
       *    第四个参数:第二个单元格的列数(从0开始)
       */
      CellRangeAddress range = new CellRangeAddress(0, 0, 0, 7);
      sheet.addMergedRegion(range);
      // 创建第二行
      HSSFRow row1 = sheet.createRow(1);
      HSSFCell cell1 = row1.createCell(0);
      cell1.setCellValue(new HSSFRichTextString("本次会议时间:2009年8月31日       前次会议时间:2009年8月24日"));
      cell1.setCellStyle(centerstyle);
      // 合并单元格
      range = new CellRangeAddress(1, 2, 0, 7);
      sheet.addMergedRegion(range);
      // 第三行
      HSSFRow row2 = sheet.createRow(3);
      row2.setHeight((short) 750);
      HSSFCell cell = row2.createCell(0);
      cell.setCellValue(new HSSFRichTextString("责任者"));
      cell.setCellStyle(columnHeadStyle);
      cell = row2.createCell(1);
      cell.setCellValue(new HSSFRichTextString("成熟度排序"));
      cell.setCellStyle(columnHeadStyle);
      cell = row2.createCell(2);
      cell.setCellValue(new HSSFRichTextString("事项"));
      cell.setCellStyle(columnHeadStyle);
      cell = row2.createCell(3);
      cell.setCellValue(new HSSFRichTextString("前次会议要求\n/新项目的项目概要"));
      cell.setCellStyle(columnHeadStyle);
      cell = row2.createCell(4);
      cell.setCellValue(new HSSFRichTextString("上周工作进展"));
      cell.setCellStyle(columnHeadStyle);
      cell = row2.createCell(5);
      cell.setCellValue(new HSSFRichTextString("本周工作计划"));
      cell.setCellStyle(columnHeadStyle);
      cell = row2.createCell(6);
      cell.setCellValue(new HSSFRichTextString("问题和建议"));
      cell.setCellStyle(columnHeadStyle);
      cell = row2.createCell(7);
      cell.setCellValue(new HSSFRichTextString("备 注"));
      cell.setCellStyle(columnHeadStyle);
      // 访问数据库,得到数据集
      List<DeitelVO> deitelVOList = getEntityManager().queryDeitelVOList();
      int m = 4;
      int k = 4;
      for (int i = 0; i < deitelVOList.size(); i++) {
        DeitelVO vo = deitelVOList.get(i);
        String dname = vo.getDname();
        List<Workinfo> workList = vo.getWorkInfoList();
        HSSFRow row = sheet.createRow(m);
        cell = row.createCell(0);
        cell.setCellValue(new HSSFRichTextString(dname));
        cell.setCellStyle(centerstyle);
        // 合并单元格
        range = new CellRangeAddress(m, m + workList.size() - 1, 0, 0);
        sheet.addMergedRegion(range);
        m = m + workList.size();

        for (int j = 0; j < workList.size(); j++) {
          Workinfo w = workList.get(j);
          // 遍历数据集创建Excel的行
          row = sheet.getRow(k + j);
          if (null == row) {
            row = sheet.createRow(k + j);
          }
          cell = row.createCell(1);
          cell.setCellValue(w.getWnumber());
          cell.setCellStyle(centerstyle);
          cell = row.createCell(2);
          cell.setCellValue(new HSSFRichTextString(w.getWitem()));
          cell.setCellStyle(style);
          cell = row.createCell(3);
          cell.setCellValue(new HSSFRichTextString(w.getWmeting()));
          cell.setCellStyle(style);
          cell = row.createCell(4);
          cell.setCellValue(new HSSFRichTextString(w.getWbweek()));
          cell.setCellStyle(style);
          cell = row.createCell(5);
          cell.setCellValue(new HSSFRichTextString(w.getWtweek()));
          cell.setCellStyle(style);
          cell = row.createCell(6);
          cell.setCellValue(new HSSFRichTextString(w.getWproblem()));
          cell.setCellStyle(style);
          cell = row.createCell(7);
          cell.setCellValue(new HSSFRichTextString(w.getWremark()));
          cell.setCellStyle(style);
        }
        k = k + workList.size();
      }
      // 列尾
      int footRownumber = sheet.getLastRowNum();
      HSSFRow footRow = sheet.createRow(footRownumber + 1);
      HSSFCell footRowcell = footRow.createCell(0);
      footRowcell.setCellValue(new HSSFRichTextString("                    审  定:XXX      审  核:XXX     汇  总:XX"));
      footRowcell.setCellStyle(centerstyle);
      range = new CellRangeAddress(footRownumber + 1, footRownumber + 1, 0, 7);
      sheet.addMergedRegion(range);

      HttpServletResponse response = getResponse();
      HttpServletRequest request = getRequest();
      String filename = "未命名.xls";//设置下载时客户端Excel的名称
      // 请见:http://zmx.iteye.com/blog/622529
      filename = Util.encodeFilename(filename, request);
      response.setContentType("application/vnd.ms-excel");
      response.setHeader("Content-disposition", "attachment;filename=" + filename);
      OutputStream ouputStream = response.getOutputStream();
      workbook.write(ouputStream);
      ouputStream.flush();
      ouputStream.close();

    } catch (Exception e) {
      e.printStackTrace();
    }
    return null;
  }

 

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