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());