加密base64

 package com.lzkj.csp.bas.util;

 @SuppressWarnings("restriction")
 public class Base64Utils {

     private final static sun.misc.BASE64Encoder base64Encoder = new sun.misc.BASE64Encoder();
     private final static sun.misc.BASE64Decoder base64Decoder = new sun.misc.BASE64Decoder();

     /**
      * Base64-encode the given byte array to a String.
      *
      * @param src the original byte array (may be {@code null})
      * @return the encoded byte array as a UTF-8 String (or {@code null} if the
      * input was {@code null})
      */
     public static String encodeToString(byte[] src) {
         if (src == null)
             return null;
         return base64Encoder.encode(src);
     }

     /**
      * Base64-encode the given byte array to a String.
      *
      * @param src           the original byte array (may be {@code null})
      * @param followRFC2045 true Encoded lines be no more than 76 characters long
      *                      false Encoded lines be more than 76 characters long
      * @return
      * @see <a href="https://tools.ietf.org/html/rfc2045"/>
      * @see <a href="https://en.wikipedia.org/wiki/Base64#MIME"/>
      * @see <a href="https://en.wikipedia.org/wiki/Request_for_Comments"/>
      */
     public static String encodeToString(byte[] src, boolean followRFC2045) {
         if (src == null)
             return null;
         String encode = base64Encoder.encode(src);
         if (!followRFC2045) {
             encode = encode.replaceAll(System.getProperty("line.separator"), "");
         }
         return encode;
     }

     /**
      * Base64-decode the given byte array from an UTF-8 String.
      *
      * @param src the encoded UTF-8 String (may be {@code null})
      * @return the original byte array (or {@code null} if the input was
      * {@code null})
      */
     public static byte[] decodeFromString(String src) {
         if (src == null)
             return null;
         try {
             byte[] decodeBuffer = base64Decoder.decodeBuffer(src);
             return decodeBuffer;
         } catch (Exception e) {
             throw new RuntimeException("decodeFromString failed.", e);
         }
     }
 }

说明：以上的工具类中加密方法（encodeToString）有两个，一个是普通的base64加遵循RFC2045机密规则，此规则在加密后的符76位自动添加换行符，所以在此工具类中重写了encodeToString（String src ，boolean followRFC2045），true：遵从、false：不遵从