modifydocumentsummaryinformation.java

java 读写word excel ppt

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package org.apache.poi.hpsf.examples;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;

import org.apache.poi.hpsf.CustomProperties;
import org.apache.poi.hpsf.DocumentSummaryInformation;
import org.apache.poi.hpsf.MarkUnsupportedException;
import org.apache.poi.hpsf.NoPropertySetStreamException;
import org.apache.poi.hpsf.PropertySet;
import org.apache.poi.hpsf.PropertySetFactory;
import org.apache.poi.hpsf.SummaryInformation;
import org.apache.poi.hpsf.UnexpectedPropertySetTypeException;
import org.apache.poi.hpsf.WritingNotSupportedException;
import org.apache.poi.poifs.filesystem.DirectoryEntry;
import org.apache.poi.poifs.filesystem.DocumentEntry;
import org.apache.poi.poifs.filesystem.DocumentInputStream;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;



/**
 * <p>This is a sample application showing how to easily modify properties in
 * the summary information and in the document summary information. The
 * application reads the name of a POI filesystem from the command line and
 * performs the following actions:</p>
 * 
 * <ul>
 * 
 * <li><p>Open the POI filesystem.</p></li>
 * 
 * <li><p>Read the summary information.</p></li>
 * 
 * <li><p>Read and print the "author" property.</p></li>
 * 
 * <li><p>Change the author to "Rainer Klute".</p></li>
 * 
 * <li><p>Read the document summary information.</p></li>
 * 
 * <li><p>Read and print the "category" property.</p></li>
 * 
 * <li><p>Change the category to "POI example".</p></li>
 * 
 * <li><p>Read the custom properties (if available).</p></li>
 * 
 * <li><p>Insert a new custom property.</p></li>
 * 
 * <li><p>Write the custom properties back to the document summary
 * information.</p></li>
 * 
 * <li><p>Write the summary information to the POI filesystem.</p></li>
 * 
 * <li><p>Write the document summary information to the POI filesystem.</p></li>
 * 
 * <li><p>Write the POI filesystem back to the original file.</p></li>
 * 
 * </ol>
 * 
 * @author Rainer Klute <a
 *         href="mailto:[e-mail]">[e-mail]</a>
 * @since 2006-02-09
 * @version $Id: TestWrite.java 353637 2005-04-13 16:33:22Z klute $
 */
public class ModifyDocumentSummaryInformation
{

    /**
     * <p>Main method - see class description.</p>
     *
     * @param args The command-line parameters.
     * @throws IOException 
     * @throws MarkUnsupportedException 
     * @throws NoPropertySetStreamException 
     * @throws UnexpectedPropertySetTypeException 
     * @throws WritingNotSupportedException 
     */
    public static void main(final String[] args) throws IOException,
            NoPropertySetStreamException, MarkUnsupportedException,
            UnexpectedPropertySetTypeException, WritingNotSupportedException
    {
        /* Read the name of the POI filesystem to modify from the command line.
         * For brevity to boundary check is performed on the command-line
         * arguments. */
        File poiFilesystem = new File(args[0]);

        /* Open the POI filesystem. */
        InputStream is = new FileInputStream(poiFilesystem);
        POIFSFileSystem poifs = new POIFSFileSystem(is);
        is.close();

        /* Read the summary information. */
        DirectoryEntry dir = poifs.getRoot();
        SummaryInformation si;
        try
        {
            DocumentEntry siEntry = (DocumentEntry)
                dir.getEntry(SummaryInformation.DEFAULT_STREAM_NAME);
            DocumentInputStream dis = new DocumentInputStream(siEntry);
            PropertySet ps = new PropertySet(dis);
            dis.close();
            si = new SummaryInformation(ps);
        }
        catch (FileNotFoundException ex)
        {
            /* There is no summary information yet. We have to create a new
             * one. */
            si = PropertySetFactory.newSummaryInformation();
        }

        /* Change the author to "Rainer Klute". Any former author value will
         * be lost. If there has been no author yet, it will be created. */
        si.setAuthor("Rainer Klute");
        System.out.println("Author changed to " + si.getAuthor() + ".");


        /* Handling the document summary information is analogous to handling
         * the summary information. An additional feature, however, are the
         * custom properties. */

        /* Read the document summary information. */
        DocumentSummaryInformation dsi;
        try
        {
            DocumentEntry dsiEntry = (DocumentEntry)
                dir.getEntry(DocumentSummaryInformation.DEFAULT_STREAM_NAME);
            DocumentInputStream dis = new DocumentInputStream(dsiEntry);
            PropertySet ps = new PropertySet(dis);
            dis.close();
            dsi = new DocumentSummaryInformation(ps);
        }
        catch (FileNotFoundException ex)
        {
            /* There is no document summary information yet. We have to create a
             * new one. */
            dsi = PropertySetFactory.newDocumentSummaryInformation();
        }

        /* Change the category to "POI example". Any former category value will
         * be lost. If there has been no category yet, it will be created. */
        dsi.setCategory("POI example");
        System.out.println("Category changed to " + dsi.getCategory() + ".");

        /* Read the custom properties. If there are no custom properties yet,
         * the application has to create a new CustomProperties object. It will
         * serve as a container for custom properties. */
        CustomProperties customProperties = dsi.getCustomProperties();
        if (customProperties == null)
            customProperties = new CustomProperties();
        
        /* Insert some custom properties into the container. */
        customProperties.put("Key 1", "Value 1");
        customProperties.put("Schl黶sel 2", "Wert 2");
        customProperties.put("Sample Number", new Integer(12345));
        customProperties.put("Sample Boolean", new Boolean(true));
        customProperties.put("Sample Date", new Date());

        /* Read a custom property. */
        Object value = customProperties.get("Sample Number");

        /* Write the custom properties back to the document summary
         * information. */
        dsi.setCustomProperties(customProperties);

        /* Write the summary information and the document summary information
         * to the POI filesystem. */
        si.write(dir, SummaryInformation.DEFAULT_STREAM_NAME);
        dsi.write(dir, DocumentSummaryInformation.DEFAULT_STREAM_NAME);

        /* Write the POI filesystem back to the original file. Please note that
         * in production code you should never write directly to the origin
         * file! In case of a writing error everything would be lost. */
        OutputStream out = new FileOutputStream(poiFilesystem);
        poifs.writeFilesystem(out);
        out.close();
        }

}