js 16进制转ascii

function hexToAscii(hexString) {
    let asciiString = '';
    for (let i = 0; i < hexString.length; i += 2) {
        // 取两个字符并转换为十进制数
        let hexPair = hexString.substring(i, i + 2);
        let decimalValue = parseInt(hexPair, 16);
        // 将十进制数转换为ASCII字符并添加到结果字符串中
        asciiString += String.fromCharCode(decimalValue);
    }
    return asciiString;
}

// 示例使用
let hex = "48656c6c6f20576f726c64"; // "Hello World" 的16进制表示
let ascii = hexToAscii(hex);
console.log(ascii); // 输出: Hello World

function isValidHex(hex) {
    return /^[0-9A-Fa-f]+$/.test(hex) && hex.length % 2 === 0;
}

function hexToAsciiSafe(hexString) {
    if (!isValidHex(hexString)) {
        throw new Error("Invalid hexadecimal string");
    }
    return hexToAscii(hexString);
}