js hex转ascii

function hexToAscii(hex) {
    let ascii = '';
    for (let i = 0; i < hex.length; i += 2) {
        const hexPair = hex.substring(i, i + 2);
        const decimal = parseInt(hexPair, 16);
        ascii += String.fromCharCode(decimal);
    }
    return ascii;
}

// 使用示例
const hexString = '48656c6c6f20576f726c64'; // "Hello World" 的十六进制表示
const asciiString = hexToAscii(hexString);
console.log(asciiString); // 输出: Hello World

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

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