java 用BASE64 进行加密 解密

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;public class Crypt {// --------------------------------------------------------------------------------------------// 获得密钥public SecretKey getKey(String s) throws Exception {System.out.println("s==" + s);char[] ss = s.toCharArray();String sss = "";for (int i = 0; i < ss.length; i = i + 2) {sss = sss + ss[i];}SecretKeyFactory kf = SecretKeyFactory.getInstance("DES");DESKeySpec ks = new DESKeySpec(sss.substring(0, 8).getBytes());SecretKey kd = kf.generateSecret(ks);return kd;}// --------------------------------------------------------------------------------------------------// 返回加密后的字符串// key是用于生成密钥的字符串，input是要加密的字符串public String getEncryptedString(String key, String input) {String base64 = "";try {Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");cipher.init(Cipher.ENCRYPT_MODE, getKey(key));System.out.println("getKey(key)===" + getKey(key) + "key==" + key);byte[] inputBytes = input.getBytes("UTF8");byte[] outputBytes = cipher.doFinal(inputBytes);BASE64Encoder encoder = new BASE64Encoder();base64 = encoder.encode(outputBytes);} catch (Exception e) {base64 = e.getMessage();}return base64;}// --------------------------------------------------------------------------------------------------// 返回解密后的字符串// key是用于生成密钥的字符串，input是要解密的字符串public String getDecryptedString(String key, String input) {String result = null;try {Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");cipher.init(Cipher.DECRYPT_MODE, getKey(key));BASE64Decoder decoder = new BASE64Decoder();byte[] raw = decoder.decodeBuffer(input);byte[] stringBytes = cipher.doFinal(raw);result = new String(stringBytes, "UTF8");} catch (Exception e) {result = e.getMessage();}return result;}public static void main(String[] args) {Crypt mycrypt = new Crypt();try {// SecretKey skey = mycrypt.getKey("g8TlgLEc6oqZxdwGe6pDiKB8Y");String ss = mycrypt.getEncryptedString("6678912345678906","asdfeeEEEE1231");System.out.println("ss==" + ss);String ss2 = mycrypt.getDecryptedString("6678912345678906", ss);System.out.println("ss2==" + ss2);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}}