转换工具类
public class B64ImgReplacedElementFactory implements ReplacedElementFactory {
/**
* 实现createReplacedElement 替换html中的Img标签
*
* @param c 上下文
* @param box 盒子
* @param uac 回调
* @param cssWidth css宽
* @param cssHeight css高
* @return ReplacedElement
*/
public ReplacedElement createReplacedElement(LayoutContext c, BlockBox box, UserAgentCallback uac,
int cssWidth, int cssHeight) {
Element e = box.getElement();
if (e == null) {
return null;
}
String nodeName = e.getNodeName();
// 找到img标签
if (nodeName.equals("img")) {
String attribute = e.getAttribute("src");
FSImage fsImage;
try {
// 生成itext图像
fsImage = buildImage(attribute, uac);
} catch (BadElementException e1) {
fsImage = null;
} catch (IOException e1) {
fsImage = null;
}
if (fsImage != null) {
// 对图像进行缩放
if (cssWidth != - || cssHeight != -) {
fsImage.scale(cssWidth, cssHeight);
}
return new ITextImageElement(fsImage);
}
}
return null;
}
/**
* 将base64编码解码并生成itext图像
*
* @param srcAttr 属性
* @param uac 回调
* @return FSImage
* @throws IOException io异常
* @throws BadElementException BadElementException
*/
protected FSImage buildImage(String srcAttr, UserAgentCallback uac) throws IOException,
BadElementException {
FSImage fsImage;
if (srcAttr.startsWith("data:image/")) {
String b64encoded = srcAttr.substring(srcAttr.indexOf("base64,") + "base64,".length(),
srcAttr.length());
// 解码
byte[] decodedBytes = Base64.decode(b64encoded);
fsImage = new ITextFSImage(Image.getInstance(decodedBytes));
} else {
fsImage = uac.getImageResource(srcAttr).getImage();
}
return fsImage;
}
/**
* 实现remove
*
* @param e 元素
*/
public void remove(Element e) {
}
/**
* 实现reset
*/
public void reset() {
}
/**
* 实现setFormSubmissionListener
*
* @param formsubmissionlistener 监听
*/
public void setFormSubmissionListener(FormSubmissionListener formsubmissionlistener) {
}
} ITextRenderer 调用转换工具类
ITextRenderer renderer = new ITextRenderer();
SharedContext sharedContext = renderer.getSharedContext();
// 解决base64图片支持问题
sharedContext.setReplacedElementFactory(new B64ImgReplacedElementFactory());
sharedContext.getTextRenderer().setSmoothingThreshold();
renderer.setDocumentFromString(strFileContent);
原文地址：http://blog.csdn.net/rangerkriby/article/details/17439705