Reading multiple XML files from an input stream Java

Question

How would I read multiple XML files from an input stream in Java and write them as XML files?

I have this:

InputStream is = new GZIPInputStream(new FileInputStream(file));

Edit: I have a tar.gz file say, xmls.tar.gz that is "file" that contains multiple XML files. When I convert it to a string using:

public static String convertStreamToString(java.io.InputStream is) {
        java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
        return s.hasNext() ? s.next() : "";
    }

I get all of the XML files chained together, with file information as well. On System.out.println I get(this is just the beginning of one file):

blah.xml    60      0      0        2300 12077203627  10436 0ustar     0      0 <?xml version="1.0"...

ANSWER:

This worked great for me, following on Keith's suggestion to use Apache Compress and io:

http://thinktibits.blogspot.com/2013/01/read-extract-tar-file-java-example.html

import java.io.*;
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.io.IOUtils;
public class unTar {  
        public static void main(String[] args) throws Exception{
                /* Read TAR File into TarArchiveInputStream */
                TarArchiveInputStream myTarFile=new TarArchiveInputStream(new FileInputStream(new File("tar_ball.tar")));
                /* To read individual TAR file */
                TarArchiveEntry entry = null;
                String individualFiles;
                int offset;
                FileOutputStream outputFile=null;
                /* Create a loop to read every single entry in TAR file */
                while ((entry = myTarFile.getNextTarEntry()) != null) {
                        /* Get the name of the file */
                        individualFiles = entry.getName();
                        /* Get Size of the file and create a byte array for the size */
                        byte[] content = new byte[(int) entry.getSize()];
                        offset=0;
                        /* Some SOP statements to check progress */
                        System.out.println("File Name in TAR File is: " + individualFiles);
                        System.out.println("Size of the File is: " + entry.getSize());                  
                        System.out.println("Byte Array length: " + content.length);
                        /* Read file from the archive into byte array */
                        myTarFile.read(content, offset, content.length - offset);
                        /* Define OutputStream for writing the file */
                        outputFile=new FileOutputStream(new File(individualFiles));
                        /* Use IOUtiles to write content of byte array to physical file */
                        IOUtils.write(content,outputFile);              
                        /* Close Output Stream */
                        outputFile.close();
                }               
                /* Close TarAchiveInputStream */
                myTarFile.close();
        }
}

Answer 1

After un-compressing (gzip) you still need to un-tar. The java JDK doesn't have a built in API for tar, but there are several available from third parties. See this answer: How do I extract a tar file in Java?