DES3加密工具类

最新推荐文章于 2025-07-20 13:19:12 发布

原创最新推荐文章于 2025-07-20 13:19:12 发布 · 4.2k 阅读

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该博客展示了Java代码实现3DES加解密的过程。定义了密钥、向量和编码方式，提供了3DES加密方法，将普通文本加密为Base64编码字符串；还提供了两种3DES解密方法，可将加密文本还原为原始文本。

package com.yuezhu.utils;



import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import java.security.Key;

public class DES3Util {
    // 密钥
    private final static String secretKey = "yuezhuinterfaces@email.com";
    // 向量
    private final static String iv = "01234567";
    // 加解密统一使用的编码方式
    private final static String encoding = "utf-8";

    /**
     * 3DES加密
     *
     * @param plainText 普通文本
     * @return
     * @throws Exception
     */
    public static String encode(String plainText) throws Exception {
        Key deskey;
        DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);
        Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
        cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
        byte[] encryptData = cipher.doFinal(plainText.getBytes(encoding));
        return Base64Util.encode(encryptData);
    }

    /**
     * 3DES解密
     *
     * @param encryptText 加密文本
     * @return
     * @throws Exception
     */
    public static String decode(String encryptText) throws Exception {
        Key deskey;
        DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);
        Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
        cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
        byte[] decryptData = cipher.doFinal(Base64Util.decode(encryptText));
        return new String(decryptData, encoding);
    }

    /**
     * 3DES解密
     *
     * @param encryptText 加密文本
     * @return
     * @throws Exception
     */
    public static String decode(String encryptText,String key) throws Exception {
        Key deskey;
        DESedeKeySpec spec = new DESedeKeySpec(key.getBytes());
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);
        Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
        cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
        byte[] decryptData = cipher.doFinal(Base64Util.decode(encryptText));
        return new String(decryptData, encoding);
    }

//    public static void main(String[] args) throws Exception {
//        String org = "1";
//        String jiamihou = encode(org);
//        String jiemihou = decode(jiamihou);
//        System.out.println("原始值：" + org);
//        System.out.println("加密：" + jiamihou);
//        System.out.println("解密：" + jiemihou);
//    }
}