使用des算法实现对学号姓名加密java代码

好的，以下是使用DES算法对学号姓名进行加密的Java代码：

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

public class DESUtil {

    private static final String KEY = "12345678"; // 密钥
    private static final String IV = "12345678"; // 初始向量

    public static String encrypt(String source) throws Exception {
        DESKeySpec keySpec = new DESKeySpec(KEY.getBytes("UTF-8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(keySpec);

        IvParameterSpec iv = new IvParameterSpec(IV.getBytes("UTF-8"));
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, key, iv);

        byte[] encrypted = cipher.doFinal(source.getBytes("UTF-8"));
        return bytesToHexString(encrypted);
    }

    public static String decrypt(String encrypted) throws Exception {
        byte[] enc = hexStringToBytes(encrypted);
        DESKeySpec keySpec = new DESKeySpec(KEY.getBytes("UTF-8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(keySpec);

        IvParameterSpec iv = new IvParameterSpec(IV.getBytes("UTF-8"));
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, key, iv);

        byte[] decrypted = cipher.doFinal(enc);
        return new String(decrypted, "UTF-8");
    }

    private static String bytesToHexString(byte[] bytes) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < bytes.length; i++) {
            String hex = Integer.toHexString(bytes[i] & 0xFF);
            if (hex.length() < 2) {
                sb.append('0');
            }
            sb.append(hex);
        }
        return sb.toString();
    }

    private static byte[] hexStringToBytes(String hexString) {
        if (hexString == null || hexString.equals("")) {
            return null;
        }
        hexString = hexString.toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] d = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return d;
    }

    private static byte charToByte(char c) {
        return (byte) "0123456789ABCDEF".indexOf(c);
    }
}

以上代码使用了Java标准库中的DES算法实现加密和解密。加密和解密过程中使用了PKCS5填充，以保证数据块长度为8的倍数。需要注意的是，由于DES算法已经被认为是不安全的算法，因此在实际应用中需要使用更加安全的算法来进行数据加密和解密。