利用itext将html转为pdf

import com.lowagie.text.pdf.BaseFont;import org.xhtmlrenderer.pdf.ITextFontResolver;import org.xhtmlrenderer.pdf.ITextRenderer;import java.io.File;import java.io.FileOutputStream;import java.io.OutputStream;public class HtmlToPDF { ???public static void main(String[] args) throws Exception { ???????htmlToPdf("C://Users//Administrator//Desktop//20181001.pdf","C://Users//Administrator//Desktop//xse//newFile.html"); ???} ???/** ????* 把URL转换为PDF ????* @param outputFile ????* ???????????， 示例：/data/fs/inspector/BJ20150522001.pdf ????* @param url ????* ???????????，示例：http :xxxx ????* @return ????* @throws Exception ????*/ ???public static void htmlToPdf(String outputFile, String url)throws Exception { ???????try{ ???????????OutputStream os = new FileOutputStream(outputFile); ???????????ITextRenderer renderer = new ITextRenderer(); ???????????// 如果携带图片则加上以下代码,将图片标签转换为Itext自己的图片对象 ???????????renderer.getSharedContext().setReplacedElementFactory(new Base64ImgReplacedElementFactory()); ???????????renderer.getSharedContext().getTextRenderer().setSmoothingThreshold(0); ???????????//String fontPath = HtmlToPDF.class.getClassLoader().getResource("").toString().replaceAll("file:/", "C:\\Users\\Administrator\\Downloads\\simsunttc\\") + "simsun.ttc"; ???????????// 解决中文支持问题 ?字体必须名称必须和前台页面的大小写一直（simsun 区分大小写） ???????????String fontPath="C:\\Users\\Administrator\\Downloads\\simsunttc\\simsun.ttc"; ???????????ITextFontResolver fontResolver = renderer.getFontResolver(); ???????????fontResolver.addFont(fontPath, BaseFont.IDENTITY_H,BaseFont.NOT_EMBEDDED); ???????????url=new File(url).toURI().toURL().toString(); ???????????renderer.setDocument(url); ???????????//解决图片相对路径问题，window 上必须用file:/; 后面路径只写到img标签中src的上级目录 ???????????renderer.getSharedContext().setBaseURL("file:/C:/Users/Administrator/Desktop/xse/"); ???????????renderer.layout(); ???????????renderer.createPDF(os); ???????????os.flush(); ???????????os.close(); ???????}catch(Exception e ){ ???????????e.printStackTrace(); ???????} ???}}

import com.lowagie.text.BadElementException;import com.lowagie.text.Image;import com.lowagie.text.pdf.codec.Base64;import org.w3c.dom.Element;import org.xhtmlrenderer.extend.FSImage;import org.xhtmlrenderer.extend.ReplacedElement;import org.xhtmlrenderer.extend.ReplacedElementFactory;import org.xhtmlrenderer.extend.UserAgentCallback;import org.xhtmlrenderer.layout.LayoutContext;import org.xhtmlrenderer.pdf.ITextFSImage;import org.xhtmlrenderer.pdf.ITextImageElement;import org.xhtmlrenderer.render.BlockBox;import org.xhtmlrenderer.simple.extend.FormSubmissionListener;import java.io.IOException;/** *  * 图片base64支持，把图片转换为itext自己的图片对象 *  * @author Administrator *  * *   */public class Base64ImgReplacedElementFactory 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 != -1 || cssHeight != -1) { ???????????????????fsImage.scale(cssWidth, cssHeight); ???????????????} ???????????????return new ITextImageElement(fsImage); ???????????} ???????} ???????return null; ???} ???/** ????*  * 编解码base64并生成itext图像     ????*   ????*/ ???protected FSImage buildImage(String srcAttr, UserAgentCallback uac) throws IOException, ???????????BadElementException { ???????FSImage fiImg = null; ???????if (srcAttr.toLowerCase().startsWith("data:image/")) { ???????????String base64Code = srcAttr.substring(srcAttr.indexOf("base64,") + "base64,".length(), srcAttr.length()); ???????????// 解码 ???????????byte[] decodedBytes = Base64.decode(base64Code); ???????????fiImg = new ITextFSImage(Image.getInstance(decodedBytes)); ???????} else { ???????????fiImg = uac.getImageResource(srcAttr).getImage(); ???????} ???????return fiImg; ???} ???public void reset() { ???} ???@Override ???public void remove(Element arg0) { ???} ???@Override ???public void setFormSubmissionListener(FormSubmissionListener arg0) { ???}}