utility to dump ooxml files into file system

git-svn-id: https://svn.apache.org/repos/asf/poi/branches/ooxml@695828 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xssf/dev/XSSFDump.java

@@ -0,0 +1,93 @@
+/* ====================================================================
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+package org.apache.poi.xssf.dev;
+
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+import org.w3c.dom.Document;
+
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.DocumentBuilder;
+import java.io.FileOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.zip.ZipFile;
+import java.util.zip.ZipEntry;
+import java.util.Enumeration;
+
+import com.sun.org.apache.xml.internal.serialize.XMLSerializer;
+import com.sun.org.apache.xml.internal.serialize.OutputFormat;
+
+/**
+ * Utility class which dumps the contents of a *.xlsx file into file system.
+ *
+ * @author Yegor Kozlov
+ */
+public class XSSFDump {
+
+    public static void main(String[] args) throws Exception {
+        for (int i = 0; i < args.length; i++) {
+            System.out.println("Dumping " + args[i]);
+            ZipFile zip = new ZipFile(args[i]);
+            dump(zip);
+        }
+    }
+
+    public static void dump(ZipFile zip) throws Exception {
+        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+        DocumentBuilder builder = factory.newDocumentBuilder();
+
+        String zipname = zip.getName();
+        int sep = zipname.lastIndexOf('.');
+        File root = new File(zipname.substring(0, sep));
+        root.mkdir();
+
+        Enumeration en = zip.entries();
+        while(en.hasMoreElements()){
+            ZipEntry entry = (ZipEntry)en.nextElement();
+            String name = entry.getName();
+            int idx = name.lastIndexOf('/');
+            if(idx != -1){
+                File bs = new File(root, name.substring(0, idx));
+                bs.mkdirs();
+            }
+
+            File f = new File(root, entry.getName());
+            FileOutputStream out = new FileOutputStream(f);
+
+            if(entry.getName().endsWith(".xml") || entry.getName().endsWith(".vml")){
+                //pass the xml through the Xerces serializer to produce nicely formatted output
+                Document doc = builder.parse(zip.getInputStream(entry));
+
+                OutputFormat  format  = new OutputFormat( doc );
+                format.setIndenting(true);
+
+                XMLSerializer serial = new  XMLSerializer( out, format );
+                serial.asDOMSerializer();
+                serial.serialize( doc.getDocumentElement() );
+
+            } else {
+                int pos;
+                byte[] chunk = new byte[2048];
+                InputStream is = zip.getInputStream(entry);
+                while((pos = is.read(chunk)) > 0) out.write(chunk, 0, pos);
+            }
+            out.close();
+
+        }
+    }
+}