java 中使用Base64

    byte[] cipherData = Base64.encodeBase64(plainText.getBytes()); //默认不换行

    byte[] cipherData = Base64.encodeBase64(plainText.getBytes(), false); //取消换行

    byte[] cipherData = Base64.encodeBase64Chunked(plainText.getBytes()); //进行换行

    String cipherText = Base64.encodeBase64String(plainText.getBytes()); //转为字符串  

  2. 安全的url：转换+为-、/为_、将多余的=去掉

Java代码 

    byte[] cipherData = Base64.encodeBase64(plainText.getBytes(), false, true);

    byte[] cipherData = Base64.encodeBase64URLSafe(plainText.getBytes());

    String cipherText = Base64.encodeBase64URLSafeString(plainText.getBytes());