使用base64實現用戶密碼加密

一個類和一個jar包便可搞定

jar包:org.apache.commons.codec.binary.Base64；

下載地址：https://mvnrepository.com/artifact/commons-codec/commons-codec

類：

package com.xxl.job.admin.util;
 
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
 
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
 
import org.apache.commons.codec.binary.Base64;
 
public class CryptoUtil {
 
    public static Key DEFAULT_KEY = null;
 
    public static final String DEFAULT_SECRET_KEY = "1qaz2wsx3edc$RFV%TGB^YHN&UJM";
 
    public static final String DES = "DES";
 
    static {
        DEFAULT_KEY = obtainKey(DEFAULT_SECRET_KEY);
    }
 
    /**
     * 得到key
     **/
    public static Key obtainKey(String key) {
        if (key == null) {
            return DEFAULT_KEY;
        }
        KeyGenerator generator = null;
        try {
            generator = KeyGenerator.getInstance(DES);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        generator.init(new SecureRandom(key.getBytes()));
        Key key1 = generator.generateKey();
        generator = null;
        return key1;
    }
 
    /**
     * 加密<br>
     * String明文輸入,String密文輸出
     */
    public static String encode(String str) {
        return encode(null, str);
    }
 
    /**
     * 加密<br>
     * String明文輸入,String密文輸出
     */
    public static String encode(String key, String str) {
        return Base64.encodeBase64URLSafeString(obtainEncode(key, str.getBytes()));
        // return Hex.encodeHexString(obtainEncode(key, str.getBytes()));
        // 能夠轉化爲16進制數據
    }
 
    /**
     * 解密<br>
     * 以String密文輸入,String明文輸出
     */
    public static String decode(String str) {
        return decode(null, str);
    }
 
    /**
     * 解密<br>
     * 以String密文輸入,String明文輸出
     */
    public static String decode(String key, String str) {
        return new String(obtainDecode(key, Base64.decodeBase64(str)));
        // 能夠轉化爲16進制的數據
//      try {
//          return new String(obtainDecode(key, Hex.decodeHex(str.toCharArray())));
//      } catch (DecoderException e) {
//          // TODO Auto-generated catch block
//          e.printStackTrace();
//      }
    }
 
    /**
     * 加密<br>
     * 以byte[]明文輸入,byte[]密文輸出
     */
    private static byte[] obtainEncode(String key, byte[] str) {
        byte[] byteFina = null;
        Cipher cipher;
        try {
            Key key1 = obtainKey(key);
            cipher = Cipher.getInstance(DES);
            cipher.init(Cipher.ENCRYPT_MODE, key1);
            byteFina = cipher.doFinal(str);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            cipher = null;
        }
        return byteFina;
    }
 
    @Override
    public int hashCode() {
        return super.hashCode();
    }
 
    /**
     * 解密<br>
     * 以byte[]密文輸入,以byte[]明文輸出
     */
    private static byte[] obtainDecode(String key, byte[] str) {
        Cipher cipher;
        byte[] byteFina = null;
        try {
            Key key1 = obtainKey(key);
            cipher = Cipher.getInstance(DES);
            cipher.init(Cipher.DECRYPT_MODE, key1);
            byteFina = cipher.doFinal(str);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            cipher = null;
        }
        return byteFina;
    }
 
    public static void main(String[] args) {
        String a = "root";
//        String key = "yang測試";
        System.out.println(a);
        String m = encode(a);
        System.out.println(m);
        String n = decode(m);
        System.out.println(n);
    }

--------------------- 
做者：yang1393214887 
來源：CSDN 
原文：https://blog.csdn.net/yang1393214887/article/details/83411051