zoukankan      html  css  js  c++  java
  • POI获取单元格的宽和高

    获取单元格的宽,即获取所在列的宽。先获取单元格所在的sheet:cell.getSheet()

    sheet.getColumnWidth( cell.getColumnIndex() )  单位不是像素,是1/256个字符宽度
    sheet.getColumnWidthInPixels( cell.getColumnIndex() )  单位是像素

    获取单元格的高,即获取所在行的高。先获取单元格所在的row:cell.getRow()

    row.getHeight()
    row.getHeightInPoints()
    这两个属性的区别在于HeightInPoints的单位是点,而Height的单位是1/20个点,所以Height的值永远是HeightInPoints的20倍

    如果说,我非要获取到单元格行高的像素值,该怎么办呢?俺有个不太精确的方法。

    网上有大神总结:
      EXCEL列高度的单位是磅,Apache POI的行高度单位是缇(twip)
      DPI = 1英寸内可显示的像素点个数。通常电脑屏幕是96DPI, IPhone4s的屏幕是326DPI, 普通激光黑白打印机是400DPI
      要计算POI行高或者Excel的行高,就先把它行转换到英寸,再乘小DPI就可以得到像素
      像素= (Excel的行高度/72)*DPI

    所以获取行高的像素值的方法就是: (row.getHeightInPoints() / 72) * 96

    四个方法对应的参考文档如下:

    前两个,参考文档链接:https://poi.apache.org/apidocs/org/apache/poi/ss/usermodel/Sheet.html

    getColumnWidth
        int getColumnWidth(int columnIndex)
        get the width (in units of 1/256th of a character width )
        Character width is defined as the maximum digit width of the numbers 0, 1, 2, ... 9 as rendered using the default font (first font in the workbook)
    Parameters:
        columnIndex - - the column to get (0-based)
    Returns:
        width - the width in units of 1/256th of a character width
    getColumnWidthInPixels
        float getColumnWidthInPixels(int columnIndex)
        get the width in pixel
        Please note, that this method works correctly only for workbooks with the default font size (Arial 10pt for .xls and Calibri 11pt for .xlsx). If the default font is changed the column width can be streched
    Parameters:
        columnIndex - - the column to set (0-based)
    Returns:
        width in pixels

      

    后两个,参考文档链接:https://poi.apache.org/apidocs/org/apache/poi/ss/usermodel/Row.html

    getHeight
    short getHeight()
        Get the row's height measured in twips (1/20th of a point). If the height is not set, the default worksheet value is returned, See Sheet.getDefaultRowHeightInPoints()
    Returns:
        row height measured in twips (1/20th of a point)
    getHeightInPoints
        float getHeightInPoints()
        Returns row height measured in point size. If the height is not set, the default worksheet value is returned, See Sheet.getDefaultRowHeightInPoints()
    Returns:
        row height measured in point size
    See Also:
        Sheet.getDefaultRowHeightInPoints()


      原创文章,欢迎转载,转载请注明出处

  • 相关阅读:
    汇总sql
    mybatis动态表名
    Windows下PHP(Thread Safe与Non Thread Safe)版本说明
    清除mssql日志
    ISAPI_Rewrite的一些参数
    sublime相关
    php301代码
    【备忘】win7下IIS 用FastCGI模块 配置PHP
    poj 2112 Optimal Milking floyd + 二分 + 最大流
    记录运行时间
  • 原文地址:https://www.cnblogs.com/acm-bingzi/p/poiWidth.html
Copyright © 2011-2022 走看看