MD5工具类

实现

package cn.idea360.demo.modules.sign;


import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @author 当我遇上你
 * @公众号 当我遇上你
 * @since 2020-08-30
 */
public class MD5Utils {

    public static void main(String[] args) throws Exception{
        String content = "当我遇上你";

        // 方式1
        System.out.println(org.springframework.util.DigestUtils.md5DigestAsHex(content.getBytes()).toUpperCase()); // B50E55687698915F9F70C7470DBA6E2F

        // 方式二
        System.out.println(getMd5(content));

        // 方式三
        System.out.println(org.apache.commons.codec.digest.DigestUtils.md5Hex(content).toUpperCase());

    }

    public static String getMd5(String input)
    {
        try {

            // Static getInstance method is called with hashing MD5
            MessageDigest md = MessageDigest.getInstance("MD5");

            // digest() method is called to calculate message digest
            //  of an input digest() return array of byte
            byte[] messageDigest = md.digest(input.getBytes());

            // Convert byte array into signum representation
            BigInteger no = new BigInteger(1, messageDigest);

            // Convert message digest into hex value
            String hashtext = no.toString(16);
            while (hashtext.length() < 32) {
                hashtext = "0" + hashtext;
            }
            return hashtext.toUpperCase();
        }

        // For specifying wrong message digest algorithms
        catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }
}

最后

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