DES加密 java源文件

import java.security.SecureRandom;

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

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


/**   
 * DES加密解密类.  
 */  
public class Des{    
  
    /** 加密算法,可用 DES,DESede,Blowfish. */  
    private final static String ALGORITHM = "DES";   
       
    /**   
     * 用指定的key对数据进行DES加密.  
     * @param data 待加密的数据  
     * @param key DES加密的key, 必须要不少于8位 
     * @return 返回DES加密后的数据  
     * @throws Exception  
     */  
    public static String encrypt(String data, String key) throws Exception {   
     byte[] dt=data.getBytes("UTF-8");
     byte[] ky=key.getBytes("UTF-8");
     byte[] res=encrypt(dt,ky);