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public static String base64Encode(String str) throws java.io.IOException { if ( str == null || str.equals("") ) { return ""; } else { sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder(); byte[] b1 = str.getBytes(); String result = encoder.encode(b1); return result; } } public static String base64Decode(String str) throws java.io.IOException { if ( str == null || str.equals("") ) { retu..