testpictures.java

java 读写word excel ppt

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

import org.apache.poi.hslf.*;
import org.apache.poi.hslf.blip.*;
import org.apache.poi.hslf.model.*;
import junit.framework.TestCase;

import java.io.*;
import java.util.Arrays;

/**
 * Test adding/reading pictures
 *
 * @author Yegor Kozlov
 */
public class TestPictures extends TestCase{

    protected File cwd;

    public void setUp() throws Exception {
        cwd = new File(System.getProperty("HSLF.testdata.path"));
    }

    /**
     * Test read/write Macintosh PICT
     */
    public void testPICT() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        File img = new File(cwd, "cow.pict");
        int idx = ppt.addPicture(img, Picture.PICT);
        Picture pict = new Picture(idx);
        assertEquals(idx, pict.getPictureIndex());
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));

        //make sure we can read this picture shape and it refers to the correct picture data
        Shape[] sh = ppt.getSlides()[0].getShapes();
        assertEquals(1, sh.length);
        pict = (Picture)sh[0];
        assertEquals(idx, pict.getPictureIndex());

        //check picture data
        PictureData[] pictures = ppt.getPictureData();
        //the Picture shape refers to the PictureData object in the Presentation
        assertEquals(pict.getPictureData(), pictures[0]);

        assertEquals(1, pictures.length);
        assertEquals(Picture.PICT, pictures[0].getType());
        assertTrue(pictures[0] instanceof PICT);
        //compare the content of the initial file with what is stored in the PictureData
        byte[] src_bytes = read(img);
        byte[] ppt_bytes = pictures[0].getData();
        assertEquals(src_bytes.length, ppt_bytes.length);
        //in PICT the first 512 bytes are MAC specific and may not be preserved, ignore them
        byte[] b1 = new byte[src_bytes.length-512];
        System.arraycopy(src_bytes, 512, b1, 0, b1.length);
        byte[] b2 = new byte[ppt_bytes.length-512];
        System.arraycopy(ppt_bytes, 512, b2, 0, b2.length);
        assertTrue(Arrays.equals(b1, b2));
    }

    /**
     * Test read/write WMF
     */
    public void testWMF() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        File img = new File(cwd, "santa.wmf");
        int idx = ppt.addPicture(img, Picture.WMF);
        Picture pict = new Picture(idx);
        assertEquals(idx, pict.getPictureIndex());
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));

        //make sure we can read this picture shape and it refers to the correct picture data
        Shape[] sh = ppt.getSlides()[0].getShapes();
        assertEquals(1, sh.length);
        pict = (Picture)sh[0];
        assertEquals(idx, pict.getPictureIndex());

        //check picture data
        PictureData[] pictures = ppt.getPictureData();
        //the Picture shape refers to the PictureData object in the Presentation
        assertEquals(pict.getPictureData(), pictures[0]);

        assertEquals(1, pictures.length);
        assertEquals(Picture.WMF, pictures[0].getType());
        assertTrue(pictures[0] instanceof WMF);
        //compare the content of the initial file with what is stored in the PictureData
        byte[] src_bytes = read(img);
        byte[] ppt_bytes = pictures[0].getData();
        assertEquals(src_bytes.length, ppt_bytes.length);
        //in WMF the first 22 bytes - is a metafile header
        byte[] b1 = new byte[src_bytes.length-22];
        System.arraycopy(src_bytes, 22, b1, 0, b1.length);
        byte[] b2 = new byte[ppt_bytes.length-22];
        System.arraycopy(ppt_bytes, 22, b2, 0, b2.length);
        assertTrue(Arrays.equals(b1, b2));
    }

    /**
     * Test read/write EMF
     */
    public void testEMF() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        File img = new File(cwd, "wrench.emf");
        int idx = ppt.addPicture(img, Picture.EMF);
        Picture pict = new Picture(idx);
        assertEquals(idx, pict.getPictureIndex());
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));

        //make sure we can get this picture shape and it refers to the correct picture data
        Shape[] sh = ppt.getSlides()[0].getShapes();
        assertEquals(1, sh.length);
        pict = (Picture)sh[0];
        assertEquals(idx, pict.getPictureIndex());

        //check picture data
        PictureData[] pictures = ppt.getPictureData();
        //the Picture shape refers to the PictureData object in the Presentation
        assertEquals(pict.getPictureData(), pictures[0]);

        assertEquals(1, pictures.length);
        assertEquals(Picture.EMF, pictures[0].getType());
        assertTrue(pictures[0] instanceof EMF);
        //compare the content of the initial file with what is stored in the PictureData
        byte[] src_bytes = read(img);
        byte[] ppt_bytes = pictures[0].getData();
        assertTrue(Arrays.equals(src_bytes, ppt_bytes));
    }

    /**
     * Test read/write PNG
     */
    public void testPNG() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        File img = new File(cwd, "tomcat.png");
        int idx = ppt.addPicture(img, Picture.PNG);
        Picture pict = new Picture(idx);
        assertEquals(idx, pict.getPictureIndex());
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));

        //make sure we can read this picture shape and it refers to the correct picture data
        Shape[] sh = ppt.getSlides()[0].getShapes();
        assertEquals(1, sh.length);
        pict = (Picture)sh[0];
        assertEquals(idx, pict.getPictureIndex());

        //check picture data
        PictureData[] pictures = ppt.getPictureData();
        //the Picture shape refers to the PictureData object in the Presentation
        assertEquals(pict.getPictureData(), pictures[0]);

        assertEquals(1, pictures.length);
        assertEquals(Picture.PNG, pictures[0].getType());
        assertTrue(pictures[0] instanceof PNG);
        //compare the content of the initial file with what is stored in the PictureData
        byte[] src_bytes = read(img);
        byte[] ppt_bytes = pictures[0].getData();
        assertTrue(Arrays.equals(src_bytes, ppt_bytes));
    }

    /**
     * Test read/write JPEG
     */
    public void testJPEG() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        File img = new File(cwd, "clock.jpg");
        int idx = ppt.addPicture(img, Picture.JPEG);