DES使用示例代码 java版

des有点简单 直接上代码

package com.utils;

import java.security.SecureRandom;
import java.util.Base64;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class DesUtils {

    private static final String CHARSET = "utf-8";
    
        // 加密方法   data:待加密数据  key:加密密钥
    public static String encrypt(String data, String key) throws Exception {
        byte[] bytes = data.getBytes(CHARSET);
        byte[] encryptData = encrypt(bytes, key);
        return Base64.getEncoder().encodeToString(encryptData);
    }
    // 解密方法 data:待解密数据  key:解密密钥
    public static String decrypt(String data, String key) throws Exception {
        byte[] bytes = Base64.getDecoder().decode(data);
        byte[] decryptData = decrypt(bytes, key);
        return new String(decryptData, CHARSET);
    }
    
    public static byte[] encrypt(byte[] data, String key) throws Exception {
        SecureRandom random = new SecureRandom();
        DESKeySpec desKey = new DESKeySpec(key.getBytes());
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey securekey = keyFactory.generateSecret(desKey);
        Cipher cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.ENCRYPT_MODE, securekey, random);
        return cipher.doFinal(data);
        
    }
    
    public static byte[] decrypt(byte[] data, String key) throws Exception {
        SecureRandom random = new SecureRandom();
        DESKeySpec desKey = new DESKeySpec(key.getBytes());
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey securekey = keyFactory.generateSecret(desKey);
        Cipher cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.DECRYPT_MODE, securekey, random);
        return cipher.doFinal(data);
    }
    
}