解决iText2.0.8+freemark导出pdf不支持base64的解决办法

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