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;

}

@Override

public 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;

}

@Override

public boolean isRegistered(String arg0) {

// TODO Auto-generated method stub

return 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)

*/

@Override

public List end(final WorkerContext ctx, final Tag tag, final List currentContent) {

final Map attributes = tag.getAttributes();

String src = attributes.get(HTML.Attribute.SRC);

List elements = new ArrayList(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 1

Document 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 2

PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(file));

// step 3

document.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 5

document.close();

bais.close();

} catch (Exception e) {

throw new I18NIllegalArgumentException(e);

}

}

PS:  input框等的显示还没实现，待完善