javax.crypto.BadPaddingException: Given final block not properly padded解決方案

JAVA的AES加密解密在windows上測試一切正常，上傳到空間上在解密時就出現錯誤。空間是Linux系統

查看日志發現出現此異常

　　javax.crypto.BadPaddingException: Given final block not properly padded

后面百度了一下終於解決了，在生成key的時候出現錯誤的

原來的代碼：

private Key initKeyForAES(String key) throws NoSuchAlgorithmException {
        if (null == key || key.length() == 0) {
            throw new NullPointerException("key not is null");
        }
        SecretKeySpec key2 = null;try {
            KeyGenerator kgen = KeyGenerator.getInstance("AES");
            kgen.init(128, new SecureRandom(key.getBytes()));
            SecretKey secretKey = kgen.generateKey();
            byte[] enCodeFormat = secretKey.getEncoded();
            key2 = new SecretKeySpec(enCodeFormat, "AES");
        } catch (NoSuchAlgorithmException ex) {
            throw new NoSuchAlgorithmException();
        }
        return key2;

    }

主要是紅色部分的問題

修改后代碼：

private Key initKeyForAES(String key) throws NoSuchAlgorithmException {
        if (null == key || key.length() == 0) {
            throw new NullPointerException("key not is null");
        }
        SecretKeySpec key2 = null;
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        random.setSeed(key.getBytes());
        try {
            KeyGenerator kgen = KeyGenerator.getInstance("AES");
            kgen.init(128, random);
            SecretKey secretKey = kgen.generateKey();
            byte[] enCodeFormat = secretKey.getEncoded();
            key2 = new SecretKeySpec(enCodeFormat, "AES");
        } catch (NoSuchAlgorithmException ex) {
            throw new NoSuchAlgorithmException();
        }
        return key2;

    }

其實就是SecureRandom創建的方式不同而引起的錯誤，具體原理我也不懂，因為加密解密代碼都是網上搜的，具體沒研究過這個。總之能解決問題就好。

我是從這找到解決方案的：http://wenku.baidu.com/link?url=wOibKHENi2Z5gFOL5prjGBE8RES1dZEZlrvfY1NTl89QJWtTwXUNLmgEXVYWGBGXR25oRvOKPJTI5M3o95KW0yIHwgFVEnJiZt1-0YvRQua