如下的DES加密方法会报错：Wrong key size
public static String encryptDES(String source) throws Exception{
SecretKeySpec skeySpec = new SecretKeySpec(ckplayerkey.getBytes(), "DES");
Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted = cipher.doFinal(source.getBytes("utf8"));
String data=Base64.encodeBase64String(encrypted);
return data;
}
一开始以为将AES加密方法中的关键字直接改为DES就是DES加密了，没想到报错 Wrong key size，因为前端是用cryptojs加密的，所以找到了一个答案：https://blog.csdn.net/king7950/article/details/70157463 根据该文章在java端加密成功~~
DES加密 关键代码如下：
/** * DES加密 */
public static String encodeDES(String datasource){
try{
SecureRandom random = new SecureRandom();
DESKeySpec desKey = new DESKeySpec(ckplayerkey.getBytes());
//创建一个密匙工厂，然后用它把DESKeySpec转换成
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey securekey = keyFactory.generateSecret(desKey);
//Cipher对象实际完成加密操作
Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
//用密匙初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, random);
//现在，获取数据并加密
return Base64.encodeBase64String(cipher.doFinal(datasource.getBytes())); }catch(Throwable e){
e.printStackTrace();
return null;
}
}
DES解密代码（未测试）如下：
/** * DES解密 */
public String decodeDES(String src) throws Exception {
// DES算法要求有一个可信任的随机数源
SecureRandom random = new SecureRandom();
// 创建一个DESKeySpec对象
DESKeySpec desKey = new DESKeySpec(KEY.getBytes(CODE_TYPE));
// 创建一个密匙工厂
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
// 将DESKeySpec对象转换成SecretKey对象
SecretKey securekey = keyFactory.generateSecret(desKey);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance("DES");
// 用密匙初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey, random);
// 真正开始解密操作
return IOUtils.toString(cipher.doFinal(Base64.decodeBase64(src)),"UTF-8");
}