testhssfpicturedata.java

来自「EXCEL read and write」· Java 代码 · 共 70 行

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   this work for additional information regarding copyright ownership.
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package org.apache.poi.hssf.usermodel;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import javax.imageio.ImageIO;

import junit.framework.TestCase;

import org.apache.poi.hssf.HSSFTestDataSamples;

/**
 * Test <code>HSSFPictureData</code>.
 * The code to retrieve images from a workbook provided by Trejkaz (trejkaz at trypticon dot org) in Bug 41223.
 *
 * @author Yegor Kozlov (yegor at apache dot org)
 * @author Trejkaz (trejkaz at trypticon dot org)
 */
public final class TestHSSFPictureData extends TestCase{


    public void testPictures() throws IOException {
        HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("SimpleWithImages.xls");

        List lst = wb.getAllPictures();
        //assertEquals(2, lst.size());

        for (Iterator it = lst.iterator(); it.hasNext(); ) {
            HSSFPictureData pict = (HSSFPictureData)it.next();
            String ext = pict.suggestFileExtension();
            byte[] data = pict.getData();
            if (ext.equals("jpeg")){
                //try to read image data using javax.imageio.* (JDK 1.4+)
                BufferedImage jpg = ImageIO.read(new ByteArrayInputStream(data));
                assertNotNull(jpg);
                assertEquals(192, jpg.getWidth());
                assertEquals(176, jpg.getHeight());
            } else if (ext.equals("png")){
                //try to read image data using javax.imageio.* (JDK 1.4+)
                BufferedImage png = ImageIO.read(new ByteArrayInputStream(data));
                assertNotNull(png);
                assertEquals(300, png.getWidth());
                assertEquals(300, png.getHeight());
            } else {
                //TODO: test code for PICT, WMF and EMF
            }
        }
    }
}