javax.crypto.BadPaddingException: Given final block not properly padded解决方案

JAVA的AES加密解密在windows上测试一切正常，上传到空间上在解密时就出现错误。空间是Linux系统

查看日志发现出现此异常

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

后面百度了一下终于解决了，在生成key的时候出现错误的

原来的代码：

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;    }

主要是红色部分的问题

修改后代码：

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;    }

其实就是SecureRandom创建的方式不同而引起的错误，具体原理我也不懂，因为加密解密代码都是网上搜的，具体没研究过这个。总之能解决问题就好。

我是从这找到解决方案的：http://wenku.baidu.com/link?url=wOibKHENi2Z5gFOL5prjGBE8RES1dZEZlrvfY1NTl89QJWtTwXUNLmgEXVYWGBGXR25oRvOKPJTI5M3o95KW0yIHwgFVEnJiZt1-0YvRQua