POI HSSFSTYLE

本文为收藏备查学习之用，并向原作者致敬：）

原帖地址为： http://publishblog.blogchina.com/blog/tb.b?diaryID=2432493

正文内容：

/**
  * 生成Excel表，可以指定行的高度以及对内容相同的单元格进行合并，并在超出打印范围时进行换页。
  * 
  */
 public void creatSheet(Object[] listdate,String excelFileOut,String title,String[] filed,List heigths)
 {
  try
  {
   String titles = title;
   String[] fileds = filed;
   Object[] list = listdate;
   List rh = heigths;
   HSSFWorkbook workbook = new HSSFWorkbook();
   int usedNumber = 0;
   //for(int isheet = 0;isheet < 2;isheet++) //暂时设为1,需确定其数值。
   while(list.length - usedNumber > 0)
   {
    HSSFSheet sheet = workbook.createSheet();
    int heiTotal = 0;
    //workbook.setSheetName(0,"变电一次部分",(short)1); 需传入专业组信息.
    //workbook.setSheetName(0, "利用状況表", HSSFWorkbook.ENCODING_UTF_16);
    //设置单元格宽度
    for(int clumnumber = 0;clumnumber < fileds.length;clumnumber++)
    {
     sheet.setColumnWidth((short)clumnumber,(short)((fileds[clumnumber].length() * 2) * 256));
    }
    //********************************************************************************/
    //定义title行的格式
    //System.out.println((short)((fileds.length) / 3));
    HSSFRow titlerow = sheet.createRow((short)0);
    HSSFCellStyle titlestyle = workbook.createCellStyle();
    HSSFFont titlefont = workbook.createFont();
    titlefont.setFontHeightInPoints((short)18);
    titlefont.setFontName("黑体");
    titlefont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
    titlestyle.setFont(titlefont);
    //titlestyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
    //titlestyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
    HSSFCell titlecell = titlerow.createCell((short)((fileds.length) / 3));
    titlecell.setCellStyle(titlestyle);
    titlecell.setEncoding(HSSFCell.ENCODING_UTF_16);
    titlecell.setCellValue(titles);
    //定义第二行格�?
    //sheet.addMergedRegion(new Region(1,(short)4,1,(short)6));
    HSSFRow row2 = sheet.createRow((short)1);
    HSSFCellStyle row2style = workbook.createCellStyle();
    HSSFFont row2font = workbook.createFont();
    row2font.setFontHeightInPoints((short)12);
    row2font.setFontName("仿宋_GB2312");
    //字体加粗
    row2font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
    row2style.setFont(row2font);
    //设定样式的的背景颜色填充
    row2style.setFillBackgroundColor(HSSFCellStyle.NO_FILL);
    row2style.setFillPattern(HSSFCellStyle.FINE_DOTS);
    //居中对齐
    row2style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
    row2style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
    //设定单元个背景颜�?
    row2style.setFillBackgroundColor(HSSFColor.GREY_40_PERCENT.index);
    //设置单元格显示颜�?
    row2style.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);
    row2style.setFont(row2font);
    row2style.setAlignment((short)2);//设置居中
    row2style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边�
    row2style.setBorderLeft(HSSFCellStyle.BORDER_THIN); //左边�
    row2style.setBorderRight(HSSFCellStyle.BORDER_THIN); //右边�
    row2style.setBorderTop(HSSFCellStyle.BORDER_THIN); //上边�
    //设置数据域单元格格式
    HSSFCellStyle datastyle = workbook.createCellStyle();
    HSSFFont datafont = workbook.createFont();
    datafont.setFontHeightInPoints((short)10);
    datafont.setFontName("仿宋_GB2312");
    //数据域边缘线加暗色.
    datastyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边�
    datastyle.setBorderLeft(HSSFCellStyle.BORDER_THIN); //左边�
    datastyle.setBorderRight(HSSFCellStyle.BORDER_THIN); //右边�
    datastyle.setBorderTop(HSSFCellStyle.BORDER_THIN); //上边�
    datastyle.setFont(datafont);
    datastyle.setWrapText(true);//文本区域随内容多少自动调整
    datastyle.setVerticalAlignment((short)1);//设置垂直居中
    datastyle.setAlignment((short)2);//设置水平居中
    //style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
    //style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
    for(int j = 0;j < fileds.length;j++)
    {
     HSSFCell row2cell = row2.createCell((short)j);
     row2cell.setCellStyle(row2style);
     row2cell.setEncoding(HSSFCell.ENCODING_UTF_16);
     row2cell.setCellValue(fileds[j]);
    }
  
    int tag = 0;
    for(int i = 0;i + usedNumber < list.length;i++)
    {
     int number = Integer.parseInt((String)rh.get(i + usedNumber));
     //累计高度，在大于指定值时换页.
     heiTotal = heiTotal + number;
     //判断是否换页，用break语句跳出。
     if(heiTotal >= 55)
     {
      break;
     }
     List rows = (List)list[i + usedNumber]; //此处须加累计值，因为是多页。
     tag++;
     HSSFRow row = sheet.createRow((short)i + 2);
     row.setHeight((short)(number * 256));//在此设置行的高度 需传入参数序列
     for(int k = 0;k < rows.size();k++)
     {
      HSSFCell cell = row.createCell((short)k);
      //cell.setCellType(HSSFCell.CELL_TYPE_STRING);
      cell.setCellStyle(datastyle);
      cell.setEncoding(HSSFCell.ENCODING_UTF_16);
      cell.setCellValue((String)rows.get(k));
     }
    }
    //********************************************************************************/
    //********************************************************************************/
    for(int i = 0;i + usedNumber < list.length - 1;i++)
    {
     List rowfr = (List)list[i + usedNumber];
     List rowbh = (List)list[i + 1 + usedNumber];
     if(i < tag - 1)
     {
      for(int j = 0;j < rowfr.size();j++)
      {
       //System.out.println((String)rowfr.get(j));
       //System.out.println((String)rowbh.get(j));
       if(rowfr.get(j).equals(rowbh.get(j)) && ((String)rowfr.get(j) != "") && ((String)rowbh.get(j) != "") && ((String)rowfr.get(j) != null) && ((String)rowbh.get(j) != null))
       {
        //对内容重复的单元格进行合并
        sheet.addMergedRegion(new Region(i + 2,(short)j,i + 3,(short)j));
       }
      }
     }
    }
    usedNumber = usedNumber + tag;
    //********************************************************************************/
   }
   //   新建一输出文件流
   FileOutputStream fOut = new FileOutputStream(excelFileOut);
   //   把相应的Excel 工作簿存盘
   workbook.write(fOut);
   fOut.flush();
   //   操作结束，关闭文件
   fOut.close();
   System.out.println("文件生成...");
  }
  catch(Exception e)
  {
   System.out.println("Err: " + e);
  }
 }