java md5及3des加密实现

import org.apache.commons.codec.digest.DigestUtils;

public class MD5 {

    /**
     * MD5方法
     *
     * @param text 明文
     * @param key 密钥
     * @return 密文
     * @throws Exception
     */
    public static String md5(String text, String key) {
        //加密后的字符串
        String encodeStr=DigestUtils.md5Hex(text + key);
//        System.out.println("MD5加密后的字符串为:encodeStr="+encodeStr);
        return encodeStr;
    }

    /**
     * MD5验证方法
     *
     * @param text 明文
     * @param key 密钥
     * @param md5 密文
     * @return true/false
     * @throws Exception
     */
    public static boolean verify(String text, String key, String md5)  {
        //根据传入的密钥进行验证
        String md5Text = md5(text, key);
        if(md5Text.equalsIgnoreCase(md5))
        {
//            System.out.println("MD5验证通过");
            return true;
        }

        return false;
    }
}

import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.codec.binary.Base64;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;


public class DES3EncryptionUtil {

    /**
     * 转换成十六进制字符串
     * @param key
     * @return
     *
     * lee on 2017-08-09 10:54:19
     */
    public static byte[] hex(String key){
        String f = DigestUtils.md5Hex(key);
        byte[] bkeys = new String(f).getBytes();
        byte[] enk = new byte[24];
        for (int i=0;i<24;i++){
            enk[i] = bkeys[i];
        }
        return enk;
    }

    /**
     * 3DES加密
     * @param key 密钥，24位
     * @param srcStr 将加密的字符串
     * @return
     *
     * lee on 2017-08-09 10:51:44
     */
    public static String  encode3Des(String key,String srcStr){
        byte[] keybyte = hex(key);
        byte[] src = srcStr.getBytes();
        try {
            //生成密钥
            SecretKey deskey = new SecretKeySpec(keybyte, "DESede");
            //加密
            Cipher c1 = Cipher.getInstance("DESede");
            c1.init(Cipher.ENCRYPT_MODE, deskey);

            String pwd = Base64.encodeBase64String(c1.doFinal(src));
//           return c1.doFinal(src);//在单一方面的加密或解密
            return pwd;
        } catch (java.security.NoSuchAlgorithmException e1) {
            // TODO: handle exception
            e1.printStackTrace();
        }catch(javax.crypto.NoSuchPaddingException e2){
            e2.printStackTrace();
        }catch(java.lang.Exception e3){
            e3.printStackTrace();
        }
        return null;
    }

    /**
     * 3DES解密
     * @param key 加密密钥，长度为24字节
     * @param desStr 解密后的字符串
     * @return
     *
     * lee on 2017-08-09 10:52:54
     */
    public static String decode3Des(String key, String desStr){
        Base64 base64 = new Base64();
        byte[] keybyte = hex(key);
        byte[] src = base64.decode(desStr);

        try {
            //生成密钥
            SecretKey deskey = new SecretKeySpec(keybyte, "DESede");
            //解密
            Cipher c1 = Cipher.getInstance("DESede");
            c1.init(Cipher.DECRYPT_MODE, deskey);
            String pwd = new String(c1.doFinal(src));
//            return c1.doFinal(src);
            return pwd;
        } catch (java.security.NoSuchAlgorithmException e1) {
            // TODO: handle exception
            e1.printStackTrace();
        }catch(javax.crypto.NoSuchPaddingException e2){
            e2.printStackTrace();
        }catch(java.lang.Exception e3){
            e3.printStackTrace();
        }
        return null;
    }
}

来源：CSDN

作者：樱木花道.光

链接：https://blog.csdn.net/qq_30909079/article/details/104740779