JustHTML/Tools/CaesarCipher.html at main · X-starRelight/JustHTML · 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>凯撒密码 - JustHTML 只需网页</title>
  <script>
/**
 * 动态加载（强制去除缓存） CSS 的函数
 * @param {string} src - 要加载的 CSS 的 src 链接
 * @returns {Promise} 返回一个 Promise 对象，用于处理异步加载
 */
function loadStyle(src) {
  return new Promise((resolve, reject) => {
    const link = document.createElement('link');
    link.rel = 'stylesheet';
    link.href = src + '?v=' + new Date().getTime(); // 使用时间戳避免缓存
    link.async = true;
    link.onload = resolve;
    link.onerror = reject;
    document.head.appendChild(link);
  });
}

/**
 * 动态加载（强制去除缓存） JS 的函数
 * @param {string} src - 要加载的 JS 的 src 链接
 * @returns {Promise} 返回一个 Promise 对象，用于处理异步加载
 */
function loadScript(src) {
  return new Promise((resolve, reject) => {
    const script = document.createElement('script');
    script.src = src + '?v=' + new Date().getTime(); // 使用时间戳避免缓存
    script.async = true;
    script.onload = resolve;
    script.onerror = reject;
    document.head.appendChild(script);
  });
}
</script>

  <script>
    loadStyle('../assets/style.css')
    let scriptArray = [
      "../assets/AddHeader_Tools.js",
      "../assets/AddFooter.js",
      "../assets/AddIco.js",
      "../assets/AutoRun.js",
    ]

    scriptArray.forEach(script => {
      loadScript(script);
    });
  </script>

  <script src="../package/Vue/code/vue.global.prod.js"></script>
  <script type="module" src="../package/Sober/code/main.js"></script>

  <style>
    .controls {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin: 15px 0;
    }

    .info-box {
      background-color: var(--bg-tertiary);
      padding: 10px;
      border-radius: var(--border-radius);
      margin: 10px 0;
    }

    .shift-controls {
      display: flex;
      align-items: center;
      gap: 10px;
      margin: 15px 0;
    }

    .shift-controls label {
      color: var(--accent-color);
    }

    .shift-controls input {
      width: 80px;
      padding: 5px;
    }
  </style>
</head>
<body>
  <div id="app">
    <div class="container">
      <a href="../index.html" class="back-link">← 返回首页</a>

      <div class="tool-section">
        <h2>凯撒密码</h2>
        <p>一种替换加密的技术，将明文中的各个字母按一定规律替换为其他字母</p>

        <div class="info-box">
          <p><strong>功能说明：</strong></p>
          <p>• 凯撒密码是一种最简单的加密方法之一</p>
          <p>• 将字母表中的每个字母按照固定位数进行替换</p>
          <p>• 例如，当偏移量为3时，A变为D，B变为E，以此类推</p>
        </div>

        <div class="shift-controls">
          <label for="shiftValue">偏移量：</label>
          <input
            type="number"
            id="shiftValue"
            v-model.number="shiftValue"
            min="0"
            max="25"
            @change="onShiftChange"
          >
          <button @click="decreaseShift">-</button>
          <button @click="increaseShift">+</button>
        </div>

        <div>
          <textarea
            v-model="inputText"
            placeholder="在此输入要加密或解密的文本..."
            rows="8"
          ></textarea>

          <div class="controls">
            <button @click="encrypt">加密</button>
            <button @click="decrypt">解密</button>
            <button @click="clearText">清空</button>
            <button @click="copyResult">复制结果</button>
          </div>

          <div class="result" v-if="result">
            <h3>结果：</h3>
            <p>{{ result }}</p>
          </div>
        </div>
      </div>
    </div>
  </div>

  <script>
    const { createApp, ref } = Vue;

    createApp({
      setup() {
        const inputText = ref('');
        const result = ref('');
        const shiftValue = ref(3); // 默认偏移量为3

        const caesarCipher = (text, shift, decrypt = false) => {
          if (!text) return '';

          // 如果是解密，则将偏移量取反
          if (decrypt) {
            shift = -shift;
          }

          // 确保偏移量在0-25范围内
          shift = ((shift % 26) + 26) % 26;

          return text.split('').map(char => {
            // 检查是否是字母
            if (char >= 'a' && char <= 'z') {
              // 处理小写字母
              const charCode = char.charCodeAt(0) - 'a'.charCodeAt(0);
              const shiftedCode = (charCode + shift) % 26;
              return String.fromCharCode(shiftedCode + 'a'.charCodeAt(0));
            } else if (char >= 'A' && char <= 'Z') {
              // 处理大写字母
              const charCode = char.charCodeAt(0) - 'A'.charCodeAt(0);
              const shiftedCode = (charCode + shift) % 26;
              return String.fromCharCode(shiftedCode + 'A'.charCodeAt(0));
            } else {
              // 非字母字符不变
              return char;
            }
          }).join('');
        };

        const encrypt = () => {
          result.value = caesarCipher(inputText.value, shiftValue.value);
        };

        const decrypt = () => {
          result.value = caesarCipher(inputText.value, shiftValue.value, true);
        };

        const clearText = () => {
          inputText.value = '';
          result.value = '';
        };

        const copyResult = async () => {
          if (result.value) {
            try {
              await navigator.clipboard.writeText(result.value);
              alert('已复制到剪贴板！');
            } catch (err) {
              console.error('复制失败:', err);
              // 降级方案
              const textArea = document.createElement('textarea');
              textArea.value = result.value;
              document.body.appendChild(textArea);
              textArea.select();
              document.execCommand('copy');
              document.body.removeChild(textArea);
              alert('已复制到剪贴板！');
            }
          }
        };

        const decreaseShift = () => {
          shiftValue.value = ((shiftValue.value - 1 + 26) % 26);
        };

        const increaseShift = () => {
          shiftValue.value = ((shiftValue.value + 1) % 26);
        };

        const onShiftChange = () => {
          // 确保偏移量在0-25范围内
          if (shiftValue.value < 0) {
            shiftValue.value = 0;
          } else if (shiftValue.value > 25) {
            shiftValue.value = 25;
          }
        };

        return {
          inputText,
          result,
          shiftValue,
          encrypt,
          decrypt,
          clearText,
          copyResult,
          decreaseShift,
          increaseShift,
          onShiftChange
        };
      }
    }).mount('#app');
  </script>
</body>
</html>