JAVA-BASE64 encoding and decoding

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First, reflection
/***      * Encode by Base64      *      /public static String EncodeBase64 (byte[]input) throws exception{          Class clazz =class.forname ("Com.sun.org.apache.xerces.internal.impl.dv.util.Base64");          Method mainmethod= Clazz.getmethod ("encode", byte[].class);          Mainmethod.setaccessible (true);           Object Retobj=mainmethod.invoke (NULL, New Object[]{input});           Return (String) retobj;      /***      * Decode by Base64      *      /public static byte[] DecodeBase64 (String input) throws exception{          Class Clazz=class.forname ("Com.sun.org.apache.xerces.internal.impl.dv.util.Base64");          Method mainmethod= Clazz.getmethod ("decode", string.class);          Mainmethod.setaccessible (true);           Object retobj=mainmethod.invoke (null, input);           Return (byte[]) retobj;      }

  Second, the use of Commons-codec.jar
  /**          * @param bytes          * @return * * Public          static byte[] Decode (final byte[] bytes) {              return Base64.decodebase64 (bytes);          }                /**          * Binary data encoded as BASE64 string          *          * @param bytes          * @return          * @throws Exception          */Public static string encode (final byte[] bytes) {              return new String (base64.encodebase64 (bytes));          }  

Three
/** *      Code      * @param BSTR      * @return String      *       /public static string encode (Byte[] BSTR) {       return new S Un.misc.BASE64Encoder (). Encode (BSTR);       }          /** *      decode      * @param str      * @return String      *       /public static byte[] Decode (string str) {       byte[] Bt = null;       try {           Sun.misc.BASE64Decoder decoder = new Sun.misc.BASE64Decoder ();           BT = Decoder.decodebuffer (str);       } catch (IOException e) {           e.printstacktrace ();       }              return BT;       }   

Recommended second, more useful. The Sun pack has a length limitation, but the specific use depends on the situation.

JAVA-BASE64 encoding and decoding