Java和C#交叉加密解密方法（DES）

java 部分

import javax.crypto.Cipher;   

import javax.crypto.SecretKey;   
import javax.crypto.SecretKeyFactory;   
import javax.crypto.spec.DESKeySpec;   
import javax.crypto.spec.IvParameterSpec;   
 
public class DESCryptUtil {   
    private static final String key = "20100728";   
       
    // 解密数据   
    public static String decrypt(String message) throws Exception {   
        byte[] bytesrc = stringToBytes(message);   
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");   
        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));   
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");   
        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);   
        IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));   
 
        cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);   
 
        byte[] retByte = cipher.doFinal(bytesrc);   
        return new String(retByte, "UTF-8");   
    }   
 
    //加密数据   
    public static byte[] encrypt(String message) throws Exception {   
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");   
 
        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));   
 
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");   
        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);   
        IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));   
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);   
 
        return cipher.doFinal(message.getBytes("UTF-8"));   
    }   
 
    //String转Byte数组   
    public static byte[] stringToBytes(String temp) {   
        byte digest[] = new byte[temp.length() / 2];   
        for (int i = 0; i < digest.length; i++) {   
            String byteString = temp.substring(2 * i, 2 * i + 2);   
            int byteValue = Integer.parseInt(byteString, 16);   
            digest[i] = (byte) byteValue;   
        }   
 
        return digest;   
    }   
       
    //Byte数组转String   
    public static String bytesToString(byte b[]) {   
        StringBuffer hexString = new StringBuffer();   
        for (int i = 0; i < b.length; i++) {   
            String plainText = Integer.toHexString(0xff & b[i]);   
            if (plainText.length() < 2)   
                plainText = "0" + plainText;   
            hexString.append(plainText);   
        }   
 
        return hexString.toString();   
    }   
 
    public static void main(String[] args) throws Exception {   
        String key = "20100728";   
        String value = "阿\"飞";   
        System.out.println("加密的数据:" + value);   
        String a = bytesToString(encrypt(value)).toUpperCase();   
        System.out.println("加密后的数据:" + a);     
        String b = decrypt(a);   
        System.out.println("解密后的数据:" + b);   
        System.out.println(b.length());   
    }   

} 

c# 部分