javaDM5加密算法

代码如下：

import java.security.MessageDigest;

public class Main {

    public static void main(String[] args) {
        String str = "123456";
        System.out.println(str+" 转化为："+MD5(str));
    }
    private static String MD5(String s) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] bytes = md.digest(s.getBytes("utf-8"));
            return toHex(bytes);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    private static String toHex(byte[] bytes) {
        final char[] HEX_DIGITS = "0123456789ABCDEF".toCharArray();
        StringBuilder ret = new StringBuilder(bytes.length * 2);
        for (int i = 0; i < bytes.length; i++) {
            ret.append(HEX_DIGITS[(bytes[i] >> 4) & 0x0f]);
            ret.append(HEX_DIGITS[bytes[i] & 0x0f]);
        }
        return ret.toString();
    }
}

这段代码引用MD5函数，将123456进行加密，结果如下：