Java中字符串到十六进制的转换

public static String stringToHex(String input) {
    StringBuilder hexString = new StringBuilder();
    for (char ch : input.toCharArray()) {
        hexString.append(String.format("%02X ", (int) ch));
    }
    return hexString.toString().trim();
}

public static void main(String[] args) {
    String text = "Hello, World!";
    String hex = stringToHex(text);
    System.out.println(hex);  // 输出: 48 65 6C 6C 6F 2C 20 57 6F 72 6C 64 21
}

import javax.xml.bind.DatatypeConverter;

public static String stringToHex(String input) {
    return DatatypeConverter.printHexBinary(input.getBytes());
}

public static void main(String[] args) {
    String text = "Hello, World!";
    String hex = stringToHex(text);
    System.out.println(hex);  // 输出: 48656C6C6F2C20576F726C6421
}

public static String stringToHex(String input) {
    return DatatypeConverter.printHexBinary(input.getBytes(StandardCharsets.UTF_8));
}