在HTML中对齐小数点

见 this article by Krijn Hoetmer 为你的选择和如何实现这一点。此解决方案的本质是使用CSS和JS来实现这一点:

(function() {
  var currencies = /(\$|€|€)/;
  var leftWidth = 0, rightWidth = 0;
  for(var tableCounter = 0, tables = document.getElementsByTagName("table");
      tableCounter < tables.length; tableCounter++) {
    if(tables[tableCounter].className.indexOf("fix-align-char") != -1) {
      var fCols = [], leftPart, rightPart, parts;
      for(var i = 0, cols = tables[tableCounter].getElementsByTagName("col"); i < cols.length; i++) {
        if(cols[i].getAttribute("char")) {
          fCols[i] = cols[i].getAttribute("char");
        }
      }
      for(var i = 0, trs = tables[tableCounter].rows; i < trs.length; i++) {
        for(var j = 0, tds = trs[i].getElementsByTagName("td"); j < tds.length; j++) {
          if(fCols[j]) {
            if(tds[j].innerHTML.indexOf(fCols[j]) != -1) {
              parts = tds[j].innerHTML.split(fCols[j]);
              leftPart = parts.slice(0, parts.length -1).join(fCols[j]);
              leftPart = leftPart.replace(currencies, "<span class='currency'>$1</span>");
              rightPart = fCols[j] + parts.pop();
              tds[j].innerHTML = "<span class='left'>" + leftPart + "</span><span class='right'>" + rightPart + "</span>";
            } else {
              tds[j].innerHTML = tds[j].innerHTML.replace(currencies, "<span class='currency'>$1</span>");
              tds[j].innerHTML = "<span class='left'>" + tds[j].innerHTML + "</span>";
            }
            tds[j].className = "char-align";
            var txt = document.createTextNode(tds[j].firstChild.offsetWidth);
            if(leftWidth < tds[j].firstChild.offsetWidth) {
              leftWidth = tds[j].firstChild.offsetWidth;
            }
            if(tds[j].childNodes[1]) {
              txt = document.createTextNode(tds[j].childNodes[1].offsetWidth);
              if(rightWidth < tds[j].childNodes[1].offsetWidth) {
                rightWidth = tds[j].childNodes[1].offsetWidth;
              }
            }
          }
        }
      }
    }
  }
  // This is ugly and should be improved (amongst other parts of the code ;)
  var styleText = "\n" +
      "<style type='text/css'>\n" +
      "  .fix-align-char td.char-align { width: " + (leftWidth + rightWidth) + "px; }\n" +
      "  .fix-align-char span.left { float: left; text-align: right; width: " + leftWidth + "px; }\n" +
      "  .fix-align-char span.currency { text-align: left; float: left; }\n" +
      "  .fix-align-char span.right { float: right; text-align: left; width: " + rightWidth + "px; }\n" +
      "</style>\n";
  document.body.innerHTML += styleText;
})();

table {
  border-collapse: collapse;
  width: 600px;
}
th {
  padding: .5em;
  background: #eee;
  text-align: left;
}
td {
  padding: .5em;
}
#only-css td.char-align {
  width: 7em;
}
#only-css span.left {
  float: left;
  width: 4em;
  text-align: right;
}
#only-css span.currency {
  float: left;
  width: 2em;
  text-align: left;
}
#only-css span.right {
  float: right;
  width: 3em;
  text-align: left;
}

<table id="only-css">
  <thead>
    <tr>
      <th>Number</th>
      <th>Description</th>
      <th>Costs</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>1</td>
      <td>Lorem ipsum dolor sit amet</td>
      <td class="char-align">
        <span class="left">
          <span class="currency">$</span>3
        </span>
        <span class="right">,99</span>
      </td>
    </tr>
    <tr>
      <td>2</td>
      <td>Consectetuer adipiscing elit</td>
      <td class="char-align">
        <span class="left">
          <span class="currency">$</span>13
        </span>
        <span class="right">,95</span>
      </td>
    </tr>
    <tr>
      <td>3</td>
      <td>Pellentesque fringilla nisl ac mi</td>
      <td class="char-align">
        <span class="left">
          <span class="currency">$</span>4
        </span>
        <span class="right"></span>
      </td>
    </tr>
    <tr>
      <td>4</td>
      <td>Aenean egestas gravida magna</td>
      <td class="char-align">
        <span class="left">
          <span class="currency">$</span>123
        </span>
        <span class="right">,999</span>
      </td>
    </tr>
  </tbody>
</table>

另一种格式化数字的方法如下: 35<span style="visibility: hidden">.000</span> . 也就是说,用小数展开式写出它,但用不可见的墨水写出尾随的小数。这样你就不用担心小数点的宽度了。

作弊;这个解决方案的好处:也适用于比例字体。有一个额外的列,并将整数部分从十进制分隔符和小数中拆分。然后使用这个CSS:

table{border-collapse:collapse;}
td{padding:0px;margin:0px;border:0px;}
td+td{text-align:right;}
td,td+td+td{text-align:left;}

合并标题行中的两列:

<table>
    <tr><th>Name</th><th colspan=2>Height</th></tr>
    <tr><td>eiffeltower</td> <td>324</td> <td></td></tr>
    <tr><td>giraffe</td> <td>5</td> <td>,30</td></tr>
    <tr><td>deer</td> <td>1</td> <td></td></tr>
    <tr><td>mouse</td> <td>0</td> <td>,03</td></tr>
</table>

我玩过jquery,想出了这个……

HTML

table width="600" border="1">  
  <tr><th></th><th>Aligned Column</th></tr>
  <tr><th>1st Row</th><td class='aBDP'>1.1</td></tr>
  <tr><th>2nd Row</th><td class='aBDP'>10.01</td></tr>  
  <tr><th>3rd Row</th><td class='aBDP'>100.001</td></tr>  
  <tr><th>4th Row</th><td class='aBDP'>1000.0001</td></tr>
</table>

JavaScript

$(document).ready(function() {
  $('.aBDP').each(function() {
    var wholePart, fractionPart;
    wholePart = Math.floor($(this).text()-0);
    fractionPart = Math.floor(($(this).text() % 1)*10000 + 0.5) / 10000 + "";
    html  = '<span class="left">' + wholePart + '.' + '</span>';
    html += '<span class="right">' + fractionPart.substring(2) + '</span>';
    $(this).html(html); 
  })
})

CSS

.right {
    text-align: left;
}
.left {
    float:left;
    text-align: right;
    width:10em;
}

它似乎起作用了

你能把这些数字打印出来,使它们总是有相同的小数位数,然后右对齐吗?

我喜欢简短的回答,即使长的答案也很重要,所以我喜欢;

35<span style="color:transparent">.000</span>

只是想补充一下;

<TD><div style='float:right;'><?php echo number_format($totalAmount,2); ?></div></TD>

只是把PHP加入到混合中。很大程度上还是取决于固定宽度的字体,但后者对我有用。由于OFT的数据已经是表格式的,所以在一个单元格中添加另一个表太多了,难以维护。

数千年前(或2-3年前),我编写了一个jquery填充程序,它模拟align=“char”,但似乎仍然有效。它使用了CSS填充和对colspans的解释,所以它有点聪明,但它实际上不是很好的代码(那时我刚开始使用javascript)。我希望有人能重写它(并获得所有的荣誉)。

同时,看看这是否有助于您: https://gist.github.com/inanimatt/f27ffd25c174e9d8a0907455395d147d

琐事: 浏览器不正确支持列样式的原因是表是二维数据结构,而DOM(这是JavaScript和CSS操作的对象,以及如何定义HTML5)是纯层次结构的,因此不能同时表示列和行。相反,它只定义行和单元格,根本不表示列。

如果数字是单空格的,则可以使用javascript根据小数点前的位数来调整单元格的填充(在ems中)。否则,可能会很棘手。

Krijn-Hoetmer的功能干扰了斑疹前病变( http://www.no-margin-for-errors.com/projects/prettyphoto-jquery-lightbox-clone/ )所以我做了一个jquery版本。货币部分将被删除,因为它应该是动态的,而不是基于预先定义的货币替换字符串。

需要的是phpjs中的空函数: http://phpjs.org/functions/empty:392 .

使用的jquery是1.6版。

/* This function will align table columns on the char if in the col from the 
 * colgroup has the property 'align="char"' and a attribute 'char'. The alignment
 * is done on the first occurence of the specified char.
 * 
 * The function is inspired from:
 * 
 * http://krijnhoetmer.nl/stuff/javascript/table-align-char/
 * http://stackoverflow.com/questions/1363239/aligning-decimal-points-in-html
 */
function alignNumbers()
{
  var table; /* This will store the table currently working on . */
  var i = 0; /* Every column can have it's own width, the counter makes the class name unique. */

  /* Get all tables for which the alignment fix must be done. 
   *
   * Note: this could even be further optimized by just looking for tables where
   * there is a a col with 'align="char"'. 
   */
  $('table.fix-align-char').each(function(index)
  {
    table = $(this);

    /* All table columns are fetched to have a correct index, without it it's
     * hard to get the correct table cells.
     */
    $(this).find('col').each(function(index)
    {
      /* Only those table cells are changed for which the alignment is set to
       * char and a char is given.
       */
      if ($(this).prop('align') == 'char' && !empty($(this).attr('char')))
      {
        /* Variables for storing the width for the left and right part (in pixels). */
        var left_width = 0, right_width = 0;
        var col, left_part, right_part, parts, new_html;
        i++; /* Increase the counter since we are working on a new column. */
        col = $(this);

        /* For the col index + 1 (nth-child starts counting at 1), find the table
         * cells in the current table.
         */
        table.find('> tbody > tr > td:nth-child('+ (index + 1) +')').each(function(index)
        {
          /* Split the html on the specified char. */
          parts = $(this).html().split(col.attr('char'));
          new_html = '';


          /* The first element is always the left part. The remaining part(s) are
           * the right part. Should there be more chars in the string, the right
           * parts are rejoined again with the specified char. 
           */
          left_part = parts.shift();
          right_part = parts.join(',');

          /* Add a left part to the new html if the left part isn't empty*/
          if (!empty(left_part))
          {
            new_html = new_html + '<span class="left">' + left_part + '</span>';
          }

          /* Add the specified char and the right part to the new html if 
           * the right part isn't empty*/
          if (!empty(right_part))
          {
            new_html = new_html + col.attr('char') + '<span class="right">' + right_part + '</span>';
          }

          /* If there is a new html, the width must be determined and a class is
           * added.
           * 
           * Note: outerWidth is used instead of width so padding, margin and
           * borders are taken into account.
           */
          if (!empty(new_html))
          {
            $(this).html(new_html); /* Set the new html. */
            $(this).addClass('char-align-' + i); /* Add a class to the table cell. */

            /* Get the left span to determine its outer width. */
            leftSpan = $(this).children('.left');

            if (!empty(leftSpan) && left_width < leftSpan.outerWidth())
            {
              left_width = leftSpan.outerWidth();
            }

            /* Get the right span to determine its outer width. */
            rightSpan = $(this).children('.right');

            if (!empty(rightSpan) && right_width < rightSpan.outerWidth())
            {
              right_width = rightSpan.outerWidth();
            }

          }

        });

        /* Only if any width is larger then 0, add a style. */
        if (left_width > 0 || right_width > 0)
        {
          style_text = '<style type="text/css">.fix-align-char td.char-align-' + (i) + ' span.left { float: left; text-align: right; width: ' + (left_width) + 'px; }\n.fix-align-char td.char-align-' + (i) + ' span.right { float: right; text-align: left; width: ' + right_width + 'px; }</style>';
          $('head').append(style_text);
        }

      }
    });
  });

}

$(document).ready(function(){
  alignNumbers();
});

我用javascript来解决这个问题… 这是我的HTML。

<body>
<table id="nadis">

</tr>
</table>

</body>

这是我的javascript。

var numarray = ["1.1", "12.20", "151.12", 1000.23,12451];
var highetlen = 0;
for(var i=0; i<numarray.length; i++){
    var n = numarray[i].toString();
  var res= n.split(".");
  n = res[0];

  if(highetlen < n.length){
    highetlen = n.length;
  }

}

for(var j=0; j<numarray.length; j++){
    var s = numarray[j].toString();
  var res= s.split(".");
  s = res[0];

    if(highetlen > s.length){
  var finallevel = highetlen - s.length;

  var finalhigh = "";
  for(k=0;k<finallevel;k++){
  finalhigh = finalhigh+ '&#160; ';
  }
    numarray[j] = finalhigh + numarray[j];
  }
  var nadiss = document.getElementById("nadis");
  nadiss.innerHTML += "<tr><td>" + numarray[j] + "</td></tr>";
}