Java DES 对称加密

package com.inspur.uc.util;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import com.inspur.uc.util.mail.Base64;


/**
 * DES 对称加密算法
 */
public class DESUtil {

	/**
	 * 生成密钥
	 * @param key
	 * @return SecretKey
	 */
	public static SecretKey createKey(String key) {

		// 需要判断pass长度，并需要长度大于8
		if (key == null || key.length() < 8) {
			key += "abcdefgh";
		}
		SecretKey sk = null;
		try {
			DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("ISO-8859-1"));
			SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
			sk = skf.generateSecret(desKeySpec);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return sk;
	}

	/**
	 * DES加密
	 * @param content
	 * @param key
	 * @return String
	 */
	public static String encode(String content, SecretKey key){
		try {
			Cipher cipher = Cipher.getInstance("DES");
			cipher.init(Cipher.ENCRYPT_MODE,key );
			byte[] b = cipher.doFinal(content.getBytes());
			return Base64.encodeBytes(b);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * DES解密
	 * @param miwen
	 * @param key
	 * @return String
	 * @throws Exception
	 */
	public static String decode(String miwen, SecretKey key){
		String str = null;
		try {
			Cipher cipher = Cipher.getInstance("DES");
			cipher.init(Cipher.DECRYPT_MODE, key);
			str = new String(cipher.doFinal(Base64.decode(miwen)));
		} catch (Exception e) {
			e.printStackTrace();
		}
		return str;
	}
	public static void main(String[] args)throws Exception {
		
		String yuanwen = "123test测试@qq.11.com";
		System.out.println("原文："+yuanwen);
		
		SecretKey key = createKey("123456");
		String bs = encode(yuanwen,key);
		System.out.println("加密后："+bs);
		
		String bsde = decode(bs,key);
		System.out.println("解密后："+bsde);
	}
}

 输出结果：

原文：123test测试@qq.11.com
加密后：szzkguMZPDa5LleJgENwzb92f6urkT9R
解密后：123test测试@qq.11.com