java使用itext导出PDF 包含中文，带水印，水印不被覆盖

最近要用到导出PDF，看了网上例子，很快导出来了，但是遇到了中文无法显示，水印被覆盖等等问题，最后还是搜罗了很多代码解决了，在此记录一下；另外，网上很多代码都执行无效 --

 1使用ITextRenderer导出PDF

public class PdfOld {

    protected static Log logger = LogFactory.getLog(PdfOld.class);

    /**
     *
     * @param htmlFile html文件存储路径
     * @param pdfFile  生成的pdf文件存储路径
     * @param chineseFontPath 中文字体存储路径
     */
    public static void html2pdf(String htmlFile, String pdfFile, String chineseFontPath)  {
        String url;
        OutputStream os = null;
        
        try {
        	
            url = new File(htmlFile).toURI().toURL().toString();
            
            os = new FileOutputStream(pdfFile);
          
            ITextRenderer renderer = new ITextRenderer();
            System.out.println(url);
            renderer.setDocument(url);
            // 解决中文不显示问题
            ITextFontResolver fontResolver = renderer.getFontResolver();
            fontResolver.addFont(chineseFontPath, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);

            renderer.layout();
            renderer.createPDF(os);
        } catch (Exception e) {
            logger.warn(e.toString(), e);
        } finally {
            if (os != null) {
                try {
                    os.close();
                } catch (IOException e) {
                    logger.warn(e.toString(), e);
                }
            }
        }
    }

    public static void main(String[] args) {
        try {
            //html文件路径
            String htmlFilePath = "C:\\Users\\Administrator\\Desktop\\PDFHTML.html";
            // 中文字体存储路径
            String chineseFontPath = "F:\\simsun.ttf";
            // html转pdf
            html2pdf(htmlFilePath, "C:\\Users\\Administrator\\Desktop\\index.pdf", chineseFontPath);
            System.out.println("转换成功！");
        } catch (Exception e) {
            logger.error("html转换为pdf失败", e);
        }
    }

这种方式无法带水印

2 使用PdfWriter

private static BaseFont bfChinese;

	public static void main(String[] args) throws Exception {
        String templatePath="C:\\Users\\Administrator\\Desktop\\PDFHTML.html";
        String targetPath="C:\\Users\\Administrator\\Desktop\\target.pdf";
        String waterUmagePath="C:\\Users\\Administrator\\Desktop\\test.png";
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("YYYY-MM-dd HH:mm:ss");
        String waterName = simpleDateFormat.format(new Date())  + "1122334";
        createPdfWithMark(templatePath, targetPath, waterName, waterUmagePath);
    }

    public static void createPdfWithMark(String htmlFile, String targetUrl, String waterName, String markPicUrl) throws Exception {
    	String html = createHtmlFromFile(htmlFile);
        String tempPdfPath = "C:\\Users\\timeless\\Desktop\\"+Thread.currentThread().getId()+"temp.pdf";
        createTempPdfFromHtml(html, tempPdfPath);
        addPdfMark(tempPdfPath, targetUrl, waterName, markPicUrl);
    }

    public static String createHtmlFromFile(String htmlFile) throws Exception {
        
    	BufferedInputStream in = null;
    	StringBuilder templatecontent = new StringBuilder();
    	try {
	    	File file = new File(htmlFile);
	        in = new BufferedInputStream(new FileInputStream(file));
	        byte[] bytes = new byte[1024];
	        
	        int len;
	       
	        while((len = in.read(bytes)) != -1) {
	        	templatecontent.append(new String(bytes, 0, len, "utf-8"));
	        }
    	} catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(null != in) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    	
        return templatecontent.toString();
    }

    public static void createTempPdfFromHtml(String html, String tempPdfPath) throws Exception {

        List parseToList = HTMLWorker.parseToList(new StringReader(html), null, new HashMap());
        
        Document d = new Document(PageSize.A4);

        PdfWriter writer = PdfWriter.getInstance(d, new FileOutputStream(new File(tempPdfPath)));
        
        d.open();

        for (Element e : parseToList) {
            fixChineseCoding(e);
            d.add(e);
        }
        
        d.close();
    }

    public static void addPdfMark(String InPdfFile, String outPdfFile, String waterMarkName, String markImagePath) throws Exception {

        PdfReader reader = new PdfReader(InPdfFile);

        PdfStamper stamp = new PdfStamper(reader, new FileOutputStream(outPdfFile));

		BaseFont base = BaseFont.createFont(PDFUtils.class.getClassLoader().getResource("simsun.ttf").getFile(), "Identity-H", true);
		
		int j = waterMarkName.length();
		char c = 0;
		int rise = 0;
		int total = reader.getNumberOfPages() + 1;
		
		for (int i = 1; i < total; i++) {
			rise = 500;
			PdfContentByte under = stamp.getOverContent(i);//水印上层 underContent下层
			under.beginText();
			under.setFontAndSize(base, 30);
			under.setColorFill(BaseColor.LIGHT_GRAY);

			if (j >= 15) {  
                under.setTextMatrix(30, 250);  
                for (int k = 0; k < j; k++) {  
                    under.setTextRise(rise);  
                    c = waterMarkName.charAt(k);  
                    under.showText(c + "");  
                    rise -= 6;  
                }  
            } else {  
                under.setTextMatrix(300, 100);  
                
                for (int k = 0; k < j; k++) {  
                    under.setTextRise(rise);  
                    c = waterMarkName.charAt(k);  
                    under.showText(c + "");  
                    rise -= 6;  
                }  
            }

			under.endText();

			if (StringUtils.isNotBlank(markImagePath)) {
				Image image = Image.getInstance(markImagePath);
				image.setAbsolutePosition(50, 50);
				under.addImage(image);
			}
		}
        
        stamp.close();

        File tempfile = new File(InPdfFile);

        if (tempfile.exists()) {
            tempfile.delete();
        }
    }

    private static void fixChineseCoding(Element e) throws IOException, DocumentException {
    	
        if (bfChinese == null) {
            bfChinese = BaseFont.createFont(PDFUtils.class.getClassLoader().getResource("simsun.ttf").getFile(), BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
        }
        
        //解决中文乱码
        if (e instanceof Paragraph) {
            for (Chunk c : e.getChunks()) {
            	Font cfont = new Font(bfChinese, 20, Font.NORMAL);
                cfont.setColor(c.getFont().getColor());
                cfont.setSize(c.getFont().getSize());
                c.setFont(cfont);
            }
            
            return;
        }
        
        if (e instanceof PdfPTable) {
            PdfPTable table = (PdfPTable)e;
            for (PdfPRow row : table.getRows()) {
                for (PdfPCell cell : row.getCells()) {
                    if(cell!=null && cell.getCompositeElements() != null) {
                        for(Element comp : cell.getCompositeElements()) {
                            fixChineseCoding(comp);
                        }
                    }
                }
            }
        }
    }