思路：
获取网络PPT 文件 将PPT每一页的幻灯片都转换成单张图片 用流输出到页面展示
1, 首先获取PPT格式 PPT格式无非两种 PPTX,PPT
2,获取PPT幻灯片页数传递到JSP中
3,JSP循环获取每页PPT
代码：
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;
import javax.imageio.ImageIO;
import org.apache.poi.hslf.HSLFSlideShow;
import org.apache.poi.hslf.model.Slide;
import org.apache.poi.hslf.model.TextRun;
import org.apache.poi.hslf.usermodel.RichTextRun;
import org.apache.poi.hslf.usermodel.SlideShow;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFShape;
import org.apache.poi.xslf.usermodel.XSLFSlide;
import org.apache.poi.xslf.usermodel.XSLFTextParagraph;
import org.apache.poi.xslf.usermodel.XSLFTextRun;
import org.apache.poi.xslf.usermodel.XSLFTextShape;
import org.openxmlformats.schemas.drawingml.x2006.main.CTRegularTextRun;
import org.openxmlformats.schemas.drawingml.x2006.main.CTTextBody;
import org.openxmlformats.schemas.drawingml.x2006.main.CTTextCharacterProperties;
import org.openxmlformats.schemas.drawingml.x2006.main.CTTextFont;
import org.openxmlformats.schemas.drawingml.x2006.main.CTTextParagraph;
import org.openxmlformats.schemas.presentationml.x2006.main.CTGroupShape;
import org.openxmlformats.schemas.presentationml.x2006.main.CTShape;
import org.openxmlformats.schemas.presentationml.x2006.main.CTSlide;
import com.yyt.yunbao.common.vo.PptImageResult;
/**
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@author <a href="mailto:672809024@qq.com">Xu Yuanyuan</a>
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@version 1.0
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@date 2017年4月25日 上午11:11:07
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@desc PPT转换为图片
*/
public class PPTToImageUtil {public static void main(String[] args) {
String url = "http://www.xxx.com/xxx.pptx";//支持ppt和pptx
try {
ByteArrayInputStream pptInput = Utility.readNetFile(url);
PptImageResult result = PPTToImageUtil.convert(".pptx", pptInput);
System.out.println(result.getTotalImage());
System.out.println(result.getImageByteList().size());
} catch (Exception e) {
e.printStackTrace();
}
}public static PptImageResult convert(String suffix, ByteArrayInputStream pptInput) {
if (pptInput != null) {
if (suffix.endsWith(".pptx")) {
return PPTToImageUtil.ppt2007Img(pptInput);
} else if (suffix.endsWith(".ppt")) {
return PPTToImageUtil.ppt2003Img(pptInput);
}
}
return null;
}/**
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设置PPTX字体
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@param slide
*/
private static void setFont(XSLFSlide slide) {
for (XSLFShape shape : slide.getShapes()) {
if (shape instanceof XSLFTextShape) {
XSLFTextShape txtshape = (XSLFTextShape) shape;
for (XSLFTextParagraph paragraph : txtshape.getTextParagraphs()) {
List<XSLFTextRun> truns = paragraph.getTextRuns();
for (XSLFTextRun trun : truns) {
trun.setFontFamily("宋体");
double currentFontSize = trun.getFontSize();
if((currentFontSize <=0)||(currentFontSize >=26040)){
trun.setFontSize(30);
}
}
}
}}
}
/**
- 转换为2007版的PPT到图片流
- @param bais
- @return
*/
public static PptImageResult ppt2007Img(ByteArrayInputStream bais) {
PptImageResult result = new PptImageResult();
XMLSlideShow ppt = null;
try {
ppt = new XMLSlideShow(bais);
Dimension pgsize = ppt.getPageSize();
XSLFSlide[] slides = ppt.getSlides();
result.setTotalImage(slides.length);
for (int i = 0; i < slides.length; i++) {
// 设置字体为宋体，解决中文乱码问题
CTSlide xmlObject = slides[i].getXmlObject();
setFont(slides[i]);
CTGroupShape spTree = xmlObject.getCSld().getSpTree();
CTShape[] spArray = spTree.getSpArray();
for (CTShape shape : spArray) {
CTTextBody txBody = shape.getTxBody();
if (txBody == null) {
continue;
}
CTTextParagraph[] pArray = txBody.getPArray();
CTTextFont font = CTTextFont.Factory
.parse("<xml-fragment xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main">"
+ "<a:rPr lang="zh-CN" altLang="en-US" dirty="0" smtClean="0"> "
+ "<a:latin typeface="+mj-ea"/> " + "</a:rPr>" + "</xml-fragment>");
for (CTTextParagraph textParagraph : pArray) {
CTRegularTextRun[] textRuns = textParagraph.getRArray();
for (CTRegularTextRun textRun : textRuns) {
CTTextCharacterProperties properties = textRun.getRPr();
properties.setLatin(font);
}
}
}
BufferedImage img = new BufferedImage(pgsize.width, pgsize.height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = img.createGraphics();
graphics.setPaint(Color.white);
graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
slides[i].draw(graphics);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(img, "png", baos);
baos.flush();
baos.close();
result.getImageByteList().add(baos.toByteArray());
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (bais != null) {
try {
bais.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return result;
}
/**
- 设置字体防止乱码
- @param slide
*/
private static void set2003Font(Slide slide) {
TextRun[] truns = slide.getTextRuns();
if(Utility.isNotEmpty(truns)){
for (TextRun trun: truns) {
RichTextRun[] rtruns = trun.getRichTextRuns();
if(Utility.isNotEmpty(rtruns)){
for (RichTextRun rtrun : rtruns) {
rtrun.setFontIndex(1);
rtrun.setFontName("宋体");
}
}
}
}
}
/**
- 转换为2003版的PPT到图片流
- @param bais
- @return
*/
public static PptImageResult ppt2003Img(ByteArrayInputStream bais) {
PptImageResult result = new PptImageResult();
try {
SlideShow ppt = new SlideShow(new HSLFSlideShow(bais));
Dimension pgsize = ppt.getPageSize();
Slide[] slides = ppt.getSlides();
result.setTotalImage(slides.length);
for (int i = 0; i < slides.length; i++) {
set2003Font(slides[i]);
BufferedImage img = new BufferedImage(pgsize.width, pgsize.height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = img.createGraphics();
graphics.setPaint(Color.white);
graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
slides[i].draw(graphics);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(img, "png", baos);
baos.flush();
baos.close();
result.getImageByteList().add(baos.toByteArray());
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (bais != null) {
try {
bais.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return result;
}
}
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