java本身转码解码

• 编码

  public static String getBASE64(String str) {
       if (str == null) return null;
       return (new sun.misc.BASE64Encoder()).encode( str.getBytes() );
  }

• 解码

  public static String getFromBASE64(String str) {
       if (str == null) return null;
       BASE64Decoder decoder = new BASE64Decoder();
       try {
           byte[] b = decoder.decodeBuffer(s);
           return new String(b);
       } catch (Exception e) {
           return null;
       }
   }

  利用apache的包

• 编码

     public static String encode(byte[] binaryData) {
       try {
           return new String(Base64.encodeBase64(binaryData), "UTF-8");
       } catch (UnsupportedEncodingException e) {
           return null;
       }
   }

• 解码

  public static byte[] decode(String base64String) {
        try {
            return Base64.decodeBase64(base64String.getBytes("UTF-8"));
        } catch (UnsupportedEncodingException e) {
            return null;
        }
    }