testslides.java

java 读写word excel ppt

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package org.apache.poi.hslf.model;

import junit.framework.TestCase;
import org.apache.poi.hslf.HSLFSlideShow;
import org.apache.poi.hslf.usermodel.SlideShow;

import java.io.ByteArrayOutputStream;
import java.io.ByteArrayInputStream;

/**
 * Test adding new slides to a ppt.
 * 
 * Note - uses the same empty PPT file as the core "new Slideshow" 
 *  stuff does
 * @author Yegor Kozlov
 */
public class TestSlides extends TestCase {

    /**
     * Add 1 slide to an empty ppt.
     * @throws Exception
     */
    public void testAddSlides1() throws Exception {
        SlideShow ppt = new SlideShow(new HSLFSlideShow( TestSlides.class.getResourceAsStream("/org/apache/poi/hslf/data/empty.ppt") ));
        assertTrue(ppt.getSlides().length == 0);
        
        Slide s1 = ppt.createSlide();
        assertTrue(ppt.getSlides().length == 1);
        assertEquals(3, s1._getSheetRefId());
        assertEquals(256, s1._getSheetNumber());
        assertEquals(1, s1.getSlideNumber());

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

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));
        assertTrue(ppt.getSlides().length == 1);
    }

    /**
     * Add 2 slides to an empty ppt
     * @throws Exception
     */
    public void testAddSlides2() throws Exception {
        SlideShow ppt = new SlideShow(new HSLFSlideShow( TestSlides.class.getResourceAsStream("/org/apache/poi/hslf/data/empty.ppt") ));
        assertTrue(ppt.getSlides().length == 0);
        
        Slide s1 = ppt.createSlide();
        assertTrue(ppt.getSlides().length == 1);
        assertEquals(3, s1._getSheetRefId());
        assertEquals(256, s1._getSheetNumber());
        assertEquals(1, s1.getSlideNumber());
        
        Slide s2 = ppt.createSlide();
        assertTrue(ppt.getSlides().length == 2);
        assertEquals(4, s2._getSheetRefId());
        assertEquals(257, s2._getSheetNumber());
        assertEquals(2, s2.getSlideNumber());

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

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));
        assertTrue(ppt.getSlides().length == 2);
    }

    /**
     * Add 3 slides to an empty ppt
     * @throws Exception
     */
    public void testAddSlides3() throws Exception {
        SlideShow ppt = new SlideShow(new HSLFSlideShow( TestSlides.class.getResourceAsStream("/org/apache/poi/hslf/data/empty.ppt") ));
        assertTrue(ppt.getSlides().length == 0);
        
        Slide s1 = ppt.createSlide();
        assertTrue(ppt.getSlides().length == 1);
        assertEquals(3, s1._getSheetRefId());
        assertEquals(256, s1._getSheetNumber());
        assertEquals(1, s1.getSlideNumber());
        
        Slide s2 = ppt.createSlide();
        assertTrue(ppt.getSlides().length == 2);
        assertEquals(4, s2._getSheetRefId());
        assertEquals(257, s2._getSheetNumber());
        assertEquals(2, s2.getSlideNumber());

        Slide s3 = ppt.createSlide();
        assertTrue(ppt.getSlides().length == 3);
        assertEquals(5, s3._getSheetRefId());
        assertEquals(258, s3._getSheetNumber());
        assertEquals(3, s3.getSlideNumber());

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

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));
        assertTrue(ppt.getSlides().length == 3);
        
        // Check IDs are still right
        s1 = ppt.getSlides()[0];
        assertEquals(256, s1._getSheetNumber());
        assertEquals(3, s1._getSheetRefId());
        s2 = ppt.getSlides()[1];
        assertEquals(257, s2._getSheetNumber());
        assertEquals(4, s2._getSheetRefId());
        s3 = ppt.getSlides()[2];;
        assertTrue(ppt.getSlides().length == 3);
        assertEquals(258, s3._getSheetNumber());
        assertEquals(5, s3._getSheetRefId());
    }

    /**
     * Add slides to ppt which already has two slides
     */
    public void testAddSlides2to3() throws Exception {
		String dirname = System.getProperty("HSLF.testdata.path");
        SlideShow ppt = new SlideShow(new HSLFSlideShow(dirname + "/basic_test_ppt_file.ppt"));
        
        assertTrue(ppt.getSlides().length == 2);
        
        // First slide is 256 / 4
        Slide s1 = ppt.getSlides()[0];
        assertEquals(256, s1._getSheetNumber());
        assertEquals(4, s1._getSheetRefId());
        
        // Last slide is 257 / 6
        Slide s2 = ppt.getSlides()[1];
        assertEquals(257, s2._getSheetNumber());
        assertEquals(6, s2._getSheetRefId());
        
        // Add another slide, goes in at the end
        Slide s3 = ppt.createSlide();
        assertTrue(ppt.getSlides().length == 3);
        assertEquals(258, s3._getSheetNumber());
        assertEquals(8, s3._getSheetRefId());

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

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));
        assertTrue(ppt.getSlides().length == 3);
        
        
        // Check IDs are still right
        s1 = ppt.getSlides()[0];
        assertEquals(256, s1._getSheetNumber());
        assertEquals(4, s1._getSheetRefId());
        s2 = ppt.getSlides()[1];
        assertEquals(257, s2._getSheetNumber());
        assertEquals(6, s2._getSheetRefId());
        s3 = ppt.getSlides()[2];;
        assertTrue(ppt.getSlides().length == 3);
        assertEquals(258, s3._getSheetNumber());
        assertEquals(8, s3._getSheetRefId());
    }

}