java 字符转Base64然后加密

   import sun.misc.BASE64Decoder;
   import sun.misc.BASE64Encoder; 

    private static String KEY = "12345678901234567890abcd";

    /**
     * 加密
     * @param str 字符
     * @return
     */
    public static String encodeToBase64ThenDecrypt(String str){
        if(StringUtils.isBlank(str)) return "";

        BASE64Encoder base64Encoder = new BASE64Encoder();
        String encode = base64Encoder.encode(str.getBytes());
        return TripleDes.encrypt3DES(encode, KEY);
    }

    /**
     * 解密
     * @param decry 字符
     * @return
     */
    public static String decodeToBase64ThenDecrypt(String decry) {
        if(StringUtils.isBlank(decry)) return "";

        String base64Str = TripleDes.decrypt3DES(decry, KEY);
        BASE64Decoder base64Decoder = new BASE64Decoder();
        byte[] bytes = new byte[0];
        try {
            bytes = base64Decoder.decodeBuffer(base64Str);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new String(bytes);
    

package com.lanwf.utils;

import org.apache.commons.codec.binary.Hex;
import org.apache.commons.lang3.StringUtils;

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

/**
 * 采用3DES加密，单des密钥是8字节，三重des密钥就是3*8=24字节,更加安全
 * 即密钥必须是24位
 */
public class TripleDes {

    private TripleDes(){}

    private static  Cipher DES_CIPHER;
    static {
        try {
            DES_CIPHER = Cipher.getInstance("DESede/ECB/PKCS5Padding");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 加密
     * @param str 明文字符串
     * @param key 密钥（必须24位）
     * @return
     */
    public static String encrypt3DES(String str, String key) {
        if(StringUtils.isBlank(str))return null;
        try {
            DES_CIPHER.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key.getBytes("utf-8"), "DESede"));
            byte[] encryptedData = DES_CIPHER.doFinal(str.getBytes("utf-8"));
            //转化为字符串
            return Hex.encodeHexString(encryptedData).toUpperCase();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 解密
     * @param str 密码后的密文
     * @param key 密钥（必须24位）
     * @return
     */
    public static String decrypt3DES(String str, String key) {
        if(StringUtils.isBlank(str))return null;

        try {
            DES_CIPHER.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key.getBytes("utf-8"), "DESede"));
            byte[] decryptedData = DES_CIPHER.doFinal(Hex.decodeHex(str.toCharArray()));
            return new String(decryptedData, "utf-8");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }


}