java md5工具類 java自帶md5

Quube優(yōu)選達(dá)人軟件工具2025-08-312840

以下是一個簡單的Java MD5工具類的實(shí)現(xiàn)：

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {
    private static final String MD5_ALGORITHM = "MD5";

    public static String md5(String input) throws NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance(MD5_ALGORITHM);
        byte[] messageDigest = md.digest(input.getBytes());
        StringBuilder sb = new StringBuilder();
        for (byte b : messageDigest) {
            sb.append(Integer.toHexString(0xff & b));
        }
        return sb.toString();
    }
}

使用示例：

public class Main {
    public static void main(String[] args) {
        String input = "Hello, world!";
        String md5 = MD5Util.md5(input);
        System.out.println("MD5: " + md5);
    }
}

運(yùn)行結(jié)果：