java 中使用Base64

    byte[] cipherData = Base64.encodeBase64(plainText.getBytes()); //默認不換行    
    byte[] cipherData = Base64.encodeBase64(plainText.getBytes(), false); //取消換行  
    byte[] cipherData = Base64.encodeBase64Chunked(plainText.getBytes()); //進行換行  
    String cipherText = Base64.encodeBase64String(plainText.getBytes()); //轉為字符串  

  2. 安全的url：轉換+為-、/為_、將多余的=去掉
Java代碼 

    byte[] cipherData = Base64.encodeBase64(plainText.getBytes(), false, true);  
    byte[] cipherData = Base64.encodeBase64URLSafe(plainText.getBytes());  
    String cipherText = Base64.encodeBase64URLSafeString(plainText.getBytes());