JS simple number generator implementation method (with demo source code download)

JS simple number generator implementation method (with demo source code download)_javascript skills

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Release： 2016-05-16 15:06:47

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The example in this article describes the implementation method of JS simple number generator. Share it with everyone for your reference, the details are as follows:

The screenshot of the running effect is as follows:

The specific code is as follows:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>编号生成器</title>
</head>
<body>
<h1>编号生成器</h1>
<div>
前缀：<input id="txtBegin" type="text" value="" /> 后缀：<input id="txtEnd" type="text" value="" />
<br />
位数：<input id="numCount" type="number" value="5" />
</div>
<div style="margin:10px 0;">
<label><input type="radio" name="a1" onclick="fnNum();" checked /> 连续数字</label>
<label><input type="radio" name="a1" onclick="fnPwd();" /> 随机字符</label>
</div>
<div id="divNum">
范围：<input id="numBegin" type="number" value="0" /> ~ <input id="numEnd" type="number" value="100" />
<br />
过滤字符：<input id="txtLimit" type="text" value="" /> 多个使用,号分割
</div>
<div id="divPwd" style="display:none;">
<h3>0123456789 abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ</h3>
包含字符：<input id="txtChar" type="text" value="ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" style="width:600px;" />
<br />
随机生成个数：<input id="txtCount" type="number" value="100" />
</div>
<input type="button" value="生成号码" onclick="run();" /> <span id="spanResult"></span>
<hr />
<textarea id="txtContent" style="width:600px; height:500px;">
</textarea>
<script>
var boNum = true;
function fnNum()
{
  document.getElementById('divNum').style.display = 'block';
  document.getElementById('divPwd').style.display = 'none';
  boNum = true;
}
function fnPwd()
{
  document.getElementById('divNum').style.display = 'none';
  document.getElementById('divPwd').style.display = 'block';
  boNum = false;
}
function run()
{
  var str = '';
  var txtCount = parseInt(document.getElementById('txtCount').value);
  var txtBegin = document.getElementById('txtBegin').value;
  var txtEnd = document.getElementById('txtEnd').value;
  var txtChar = document.getElementById('txtChar').value;
  var numCount = parseInt(document.getElementById('numCount').value);
  var numBegin = parseInt(document.getElementById('numBegin').value);
  var numEnd = parseInt(document.getElementById('numEnd').value);
  var txtLimit = document.getElementById('txtLimit').value;
  var limit = txtLimit.split(',');
  if (txtLimit == '')
  {
    limit = [];
  }
  var count = 0;
  if (!boNum)
  {
    var list = [];
    for (var i=0; i<txtCount; i++)
    {
      var s = '';
      for (var j=0; j<numCount; j++)
      {
        s += txtChar.charAt(Math.floor(Math.random() * txtChar.length));
      }
      var bo = false;
      for (var ii=0; ii<list.length; ii++)
      {
        if (list[ii] == s)
        {
          bo = true;
          alert(s);
          break;
        }
      }
      if (bo) continue;
      str += txtBegin + s + txtEnd + '\r\n';
      list.push(s);
      count++;
    }
  }
  else
  {
    for (var i=numBegin; i<numEnd+1; i++)
    {
      var s = '' + i;
      s = (new Array( numCount - s.length + 1 ).join('0')) + s;
      var bo = false;
      for (var k=0; k<limit.length; k++)
      {
        if (s.indexOf(limit[k]) != -1)
        {
          bo = true;
          break;
        }
      }
      if (bo) continue;
      str += txtBegin + s + txtEnd + '\r\n';
      count++;
    }
  }
  document.getElementById('txtContent').value = str;
  document.getElementById('spanResult').innerHTML = '生成了 ' + count + ' 个';
}
</script>
</body>
</html>

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Click here for the complete example codeDownload from this site.

Readers who are interested in more JavaScript-related content can check out the special topics on this site: "Summary of JavaScript switching effects and techniques", "Summary of JavaScript search algorithm techniques", "Summary of JavaScript animation special effects and techniques", "Summary of JavaScript errors and debugging skills", "Summary of JavaScript data structures and algorithm techniques", "JavaScript traversal Summary of Algorithms and Techniques" and "Summary of JavaScript Mathematical Operation Usage"

I hope this article will be helpful to everyone in JavaScript programming.