Excel-Randomization-Process/ban.html at main · Ya-MiC/Excel-Randomization-Process · GitHub

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<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Excel 随机数填充与预览</title>
  <style>
    body { font-family: Arial, sans-serif; padding: 20px; }
    main { max-width: 800px; margin: auto; }
    #preview table { border-collapse: collapse; margin-top: 20px; width: 100%; }
    #preview td, #preview th { border: 1px solid #ccc; padding: 5px; text-align: center; }
    button, input { margin: 8px 0; padding: 6px 12px; }
  </style>
</head>
<body>
  <main>
    <h1>Excel 随机数填充与预览</h1>
    <input type="file" id="inputExcel" accept=".xlsx,.xls">
    <button id="processBtn" disabled>处理并下载</button>
    <section id="preview"></section>
  </main>

  <!-- 引入依赖 -->
  <script src="https://cdn.sheetjs.com/xlsx-latest/package/dist/xlsx.full.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/file-saver@2.0.5/dist/FileSaver.min.js"></script>
  <script>
    const inputExcel = document.getElementById('inputExcel');
    const processBtn = document.getElementById('processBtn');
    const previewDiv = document.getElementById('preview');
    let workbook;

    const blankRange = 'A1:G4';  // 28 格范围
    const targetCell = 'A6';      // 目标和单元格

    inputExcel.addEventListener('change', e => {
      const file = e.target.files[0];
      if (!file) return;
      const reader = new FileReader();
      reader.onload = evt => {
        workbook = XLSX.read(evt.target.result, { type: 'binary' });
        processBtn.disabled = false;
      };
      reader.readAsBinaryString(file);
    });

    function randomPartition(n, sum) {
      const cuts = Array.from({ length: n - 1 }, () => Math.random()).sort();
      const parts = [];
      let prev = 0;
      cuts.forEach(c => {
        parts.push(Math.floor((c - prev) * sum));
        prev = c;
      });
      parts.push(sum - parts.reduce((a, b) => a + b, 0));
      // 确保最小为 1
      return parts.map(x => (x < 1 ? 1 : x));
    }

    function expandRange(range) {
      const { s, e } = XLSX.utils.decode_range(range);
      const cells = [];
      for (let r = s.r; r <= e.r; r++) {
        for (let c = s.c; c <= e.c; c++) {
          cells.push(XLSX.utils.encode_cell({ r, c }));
        }
      }
      return cells;
    }

    function s2ab(str) {
      return new TextEncoder().encode(str);
    }

    processBtn.addEventListener('click', () => {
      const ws = workbook.Sheets[workbook.SheetNames[0]];
      const target = Number(ws[targetCell]?.v);
      if (isNaN(target) || target <= 0) {
        alert('请在 ' + targetCell + ' 填入有效数字');
        return;
      }
      const nums = randomPartition(9, target);
      const cells = expandRange(blankRange);
      const posSet = new Set();
      while (posSet.size < 9) {
        posSet.add(cells[Math.floor(Math.random() * cells.length)]);
      }
      Array.from(posSet).forEach((cell, i) => {
        ws[cell] = { t: 'n', v: nums[i] };
      });
      const wbout = XLSX.write(workbook, { bookType: 'xlsx', type: 'binary' });
      saveAs(new Blob([s2ab(wbout)], { type: 'application/octet-stream' }), 'processed.xlsx');
      previewDiv.innerHTML = XLSX.utils.sheet_to_html(ws);
    });
  </script>
</body>
</html>