serialization - Append binary data to serialized xml header -

i need append binary data file before data xml header. whole file wont proper xml file must proper xml header following:

<encryptedfileheader>     <algorithm>name</algorithm>     <keysize>256</keysize>     <subblocklength>64</subblocklength>     <ciphermode>ecb</ciphermode>     <sessionkey>sessionkey</sessionkey>   </encryptedfileheader> *binary data* 

the xml header jaxb marshalling easily, , easier add binary data in base64 , store in note inside xml. clue. have store binary save overhead 33% space used base64.

so question how add data , of course later read (serialize/deserialize) ?

another question how remove first line of document?

i tried use:

marshaller.setproperty("com.sun.xml.bind.xmldeclaration", boolean.false); 

but throws exception:

javax.xml.bind.propertyexception: name: com.sun.xml.bind.xmldeclaration value: false @ javax.xml.bind.helpers.abstractmarshallerimpl.setproperty(abstractmarshallerimpl.java:358) @ com.sun.xml.internal.bind.v2.runtime.marshallerimpl.setproperty(marshallerimpl.java:527)

thanks

actualy solved serializing xml header jaxb, appending binary data (bytearray) existing file. reading file buffered reader follows:

bufferedreader reader = new bufferedreader(new filereader("filepath"));         string line, results = "";         while ((line = reader.readline()) != null) {             results += line;         }         reader.close();          string[] splited = results.split("</encryptedfileheader>");         splited[0] += "</encryptedfileheader>";         string s0 = splited[0];         string s1 = new string(splited[1]);         bytearrayinputstream bais = new bytearrayinputstream(s0.getbytes()); 

now got problem second splited string s1, consist data "bytearrayoutputstream.tobytearray();". have transfer data string byte array. from:

'��a����g�x���

to like:
[39, -63, -116, 65, -123, -114, 27, -115, -2, 103, -64, 88, -99, -96, -26, -12]

i tried (on same machine): byte[] bytes = s1.getbytes();

but bytes array different , returns 34 bytes instead 16. read lot encodings still have no idea.

edit:

the problem different number of bytes due different representation of new line character , byte streams.