itextpdf 实现html转pdf中中文及图片base64的解决方法:

1. 中文解决方案:

实现FontProvider接口:

package com.mumu.image2pdf;import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Font;
import com.itextpdf.text.FontProvider;
import com.itextpdf.text.pdf.BaseFont;public class MyFontProvider implements FontProvider {private BaseColor bc;private String fontname;private String encoding;private boolean embedded;private boolean cached;private float size;private int style;private BaseFont baseFont;public MyFontProvider() {}public BaseColor getBc() {return bc;}public void setBc(BaseColor bc) {this.bc = bc;}public String getFontname() {return fontname;}public void setFontname(String fontname) {this.fontname = fontname;}public String getEncoding() {return encoding;}public void setEncoding(String encoding) {this.encoding = encoding;}public boolean isEmbedded() {return embedded;}public void setEmbedded(boolean embedded) {this.embedded = embedded;}public boolean isCached() {return cached;}public void setCached(boolean cached) {this.cached = cached;}public float getSize() {return size;}public void setSize(float size) {this.size = size;}public int getStyle() {return style;}public void setStyle(int style) {this.style = style;}public BaseFont getBaseFont() {return baseFont;}public void setBaseFont(BaseFont baseFont) {this.baseFont = baseFont;}public MyFontProvider(BaseColor bc, String fontname, String encoding, boolean embedded, boolean cached, float size,int style, BaseFont baseFont) {super();this.bc = bc;this.fontname = fontname;this.encoding = encoding;this.embedded = embedded;this.cached = cached;this.size = size;this.style = style;this.baseFont = baseFont;}@Overridepublic Font getFont(String arg0, String arg1, boolean arg2, float arg3, int arg4, BaseColor arg5) {Font font = null;if (baseFont == null) {font = new Font();} else {font = new Font(baseFont);}font.setColor(arg5);font.setFamily(fontname);font.setSize(size);font.setStyle(arg4);return font;}@Overridepublic boolean isRegistered(String arg0) {// TODO Auto-generated method stubreturn true;}
}

2. 图片base64的dataurl显示问题解决：

实现com.itextpdf.tool.xml.html.Image类

package com.mumu.image2pdf;import java.util.ArrayList;
import java.util.List;
import java.util.Map;import com.itextpdf.text.Chunk;
import com.itextpdf.text.Element;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.codec.Base64;
import com.itextpdf.tool.xml.NoCustomContextException;
import com.itextpdf.tool.xml.Tag;
import com.itextpdf.tool.xml.WorkerContext;
import com.itextpdf.tool.xml.exceptions.RuntimeWorkerException;
import com.itextpdf.tool.xml.html.HTML;
import com.itextpdf.tool.xml.pipeline.html.HtmlPipelineContext;public class ImageTagProcessor extends com.itextpdf.tool.xml.html.Image {/** (non-Javadoc)* * @see com.itextpdf.tool.xml.TagProcessor#endElement(com.itextpdf.tool.xml.Tag, java.util.List, com.itextpdf.text.Document)*/@Overridepublic List<Element> end(final WorkerContext ctx, final Tag tag, final List<Element> currentContent) {final Map<String, String> attributes = tag.getAttributes();String src = attributes.get(HTML.Attribute.SRC);List<Element> elements = new ArrayList<Element>(1);if (null != src && src.length() > 0) {Image img = null;if (src.startsWith("data:image/")) {final String base64Data = src.substring(src.indexOf(",") + 1);try {img = Image.getInstance(Base64.decode(base64Data));} catch (Exception e) {throw new I18NIllegalArgumentException(e);}if (img != null) {try {final HtmlPipelineContext htmlPipelineContext = getHtmlPipelineContext(ctx);elements.add(getCssAppliers().apply(new Chunk((com.itextpdf.text.Image) getCssAppliers().apply(img, tag, htmlPipelineContext), 0, 0, true), tag,htmlPipelineContext));} catch (NoCustomContextException e) {throw new RuntimeWorkerException(e);}}}if (img == null) {elements = super.end(ctx, tag, currentContent);}}return elements;}
}

3. 转换方法:

public void html2pdf(String html, File file) throws I18NIllegalArgumentException {try {// step 1Document document = new Document();BaseFont bfChinese;bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", false);MyFontProvider myFontProvider = new MyFontProvider(BaseColor.BLACK, "", "", false, false, 16, 1, bfChinese);// step 2PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(file));// step 3document.open();final TagProcessorFactory tagProcessorFactory = Tags.getHtmlTagProcessorFactory();tagProcessorFactory.removeProcessor(HTML.Tag.IMG);tagProcessorFactory.addProcessor(new ImageTagProcessor(), HTML.Tag.IMG);final CssFilesImpl cssFiles = new CssFilesImpl();cssFiles.add(XMLWorkerHelper.getInstance().getDefaultCSS());final StyleAttrCSSResolver cssResolver = new StyleAttrCSSResolver(cssFiles);final HtmlPipelineContext hpc = new HtmlPipelineContext(new CssAppliersImpl(myFontProvider));hpc.setAcceptUnknown(true).autoBookmark(true).setTagFactory(tagProcessorFactory);final HtmlPipeline htmlPipeline = new HtmlPipeline(hpc, new PdfWriterPipeline(document, writer));final Pipeline<?> pipeline = new CssResolverPipeline(cssResolver, htmlPipeline);final XMLWorker worker = new XMLWorker(pipeline, true);final Charset charset = Charset.forName("UTF-8");final XMLParser xmlParser = new XMLParser(true, worker, charset);ByteArrayInputStream bais = new ByteArrayInputStream(html.getBytes("UTF-8"));xmlParser.parse(bais, charset);// step 5document.close();bais.close();} catch (Exception e) {throw new I18NIllegalArgumentException(e);}}

PS:  input框等的显示还没实现，待完善