How to read value within XML Tag data using IO Stream in Java

Question

We have xml data into a Stream and we need to extract values again into a Stream from the particular XML tag <Data> inside the Stream. PFB the sample XML which will be contained inside the stream and can someone help us to hint the java code for this. We require it using the IO API only and we need to look <DATA> for the begining of the stream and </DATA> as the end of the stream.
Please note that input is stream and output require also is a stream.
<?xml version = "1.0" encoding="UTF-8" ?>
<GenericDataEnvelope>
<DataFormat>PlainText</DataFormat>
<Name>1111</Name>
<Security>NA</Security>
<senderName>abc</senderName>
<Protocol>HTTP</Protocol>
<Data>
SElQRlhDVElQRlBCTktERUZGMDYxMDAyMDc0MzUyMDAwMTA2MTAwMjA3NDM1MlRDSEFTVVMzMzAw
MDAwMDAwMDAwMTc4LDEyMDAwMTc4MTIKezQ6TVQxMDM6CjoyMDowMDYwMDQ5MjQxMDA2NzcwCjoy
M0I6Q1JFRAo6MjNFOlNEVkEKOjMyQTowNjEwMDVDQUQwLDAxCjozM0I6RVVSMCwwMQo6MzY6MSwz
TNzcwQU5WLVJFTlRFIE9DVCAwNgowLDAxLzEsMTcxOQo6NzFBOlNIQQo6NzI6L1JFQy84NDM2MTU3
MTA2Ci19ClRJUEYK
</Data>
<DataType>INVOICE</DataType>
</GenericDataEnvelope>

Answer 1

The example you've showed is valid and it is also text.
Think seriously about this ... for example, do you have a rule that says </DATA> can't appear in the binary data?
But in any case I can't see the problem. If you want to use IO classes directly, just read lines until you see <DATA>, then read data until it ends with </DATA>, and remove that.
But I would certainly use SAX myself until proven otherwise that it won't work..