HTML转PDF实践-优快云博客

本文链接：https://blog.youkuaiyun.com/songmaolin_csdn/article/details/74375508

html页面显示

生成pdf截图

废话少说直接上代码

调用生成pdf的工具类

PdfUtil.htmlToPdf(filepath, url);//filepath:文件保存的路径，url：html页面地址

package com.hlmedicals.app.util;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;

import org.xhtmlrenderer.pdf.ITextFontResolver;
import org.xhtmlrenderer.pdf.ITextRenderer;

import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.BaseFont;

/**
* 对html的规范要求极高,例如：页面中<mate></mate>必须闭合，必须: <br />
*
* <pre>
* <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
* "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html
* xmlns="http://www.w3.org/1999/xhtml">
*
* @author zsj
*
*/
public class PdfUtil {

   public static void main(String[] args) throws Exception {
       // String filePath = PdfUtil.class.getClassLoader().getResource("")
       // .toString()
       // + "simsun.ttc";
       // System.out.println(filePath.replaceAll("file:/", ""));
       // System.out.println(new File(filePath));
       htmlToPdf("/data/fs/sinspector/BJ20150522001.pdf",
               "http://localhost:9080/account/observerInforeport/BJ20150522001");
   }

   /**
   * 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 boolean htmlToPdf(String outputFile, String url)
           throws Exception {
       File outFile = new File(outputFile);
       if (!outFile.exists()) {
           outFile.getParentFile().mkdirs();
       }



       OutputStream os = new FileOutputStream(outputFile);
       ITextRenderer renderer = new ITextRenderer();
       renderer.setDocument(url);

       String fontPath = PdfUtil.class.getClassLoader().getResource("")
               .toString().replaceAll("file:/", "")
               + "font/simsun.ttc";
       System.out.println(fontPath);
       // 解决中文支持问题
       ITextFontResolver fontResolver = renderer.getFontResolver();
       fontResolver.addFont(fontPath, BaseFont.IDENTITY_H,
               BaseFont.NOT_EMBEDDED);
       // 支持BASE64图片
       renderer.getSharedContext().setReplacedElementFactory(new B64ImgReplacedElementFactory());
       renderer.layout();
       renderer.createPDF(os);
       System.out.println("ok");
       os.flush();
       os.close();
       return true;
   }

   public static void htmlToPdf(OutputStream os, String url)
           throws DocumentException, IOException {
       ITextRenderer renderer = new ITextRenderer();

       renderer.setDocument(url);
       String fontPath = PdfUtil.class.getClassLoader()
               .getResource("/simsun.ttc").getPath();
       System.out.println(fontPath);
       // 解决中文支持问题
       ITextFontResolver fontResolver = renderer.getFontResolver();
       fontResolver.addFont(fontPath, BaseFont.IDENTITY_H,
               BaseFont.NOT_EMBEDDED);
       renderer.layout();
       renderer.createPDF(os);
       os.flush();
   }
}

//imgbase64解决

/**
*
*/
package com.hlmedicals.app.util;

import java.io.IOException;

import org.bouncycastle.util.encoders.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 com.lowagie.text.Image;
import com.lowagie.text.BadElementException;

/**
* @author dell
*
*/
public class B64ImgReplacedElementFactory implements ReplacedElementFactory{

   /*
     *
     * <p>Title: createReplacedElement</p>
     * <p>Description: </p>
     * <p>sql: </p>
     *
     * @author 2016年11月1日下午7:05:55
     *
     * @param c 上下文
     * @param box 盒子
     * @param uac 回调
     * @param cssWidth css宽
     * @param cssHeight css高
     * @return
     * @see org.xhtmlrenderer.extend.ReplacedElementFactory#createReplacedElement(org.xhtmlrenderer.layout.LayoutContext, org.xhtmlrenderer.render.BlockBox, org.xhtmlrenderer.extend.UserAgentCallback, int, int)
     */
    @Override
    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;
    }

    /**
     *
     * TODO(将base64编码解码并生成itext图像)
     * @author 2016年11月1日下午7:08:57
     * @param srcAttr 属性
     * @param uac 回调
     * @return
     * @throws IOException
     * @throws 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;
    }

    @Override
    public void remove(Element arg0) {
        // TODO 自动生成的方法存根

    }

    @Override
    public void reset() {
        // TODO 自动生成的方法存根

    }

    @Override
    public void setFormSubmissionListener(FormSubmissionListener arg0) {
        // TODO 自动生成的方法存根

    }
}

jsp文件：

<%@ page language="java" import="java.util.*" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@include file="/context/mytags.jsp"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" ></meta>
<title>电子处方</title>
<t:base type="jquery,easyui,tools,DatePicker"></t:base>
<script type="text/javascript" src="plug-in/jquery/jquery-1.8.3.js"></script>
<link href="plug-in/ace/assets/css/bootstrap.min.css" rel="stylesheet"/>
<link href="plug-in/ace/assets/css/bootstrap-table.min.css" rel="stylesheet"/>
<link rel="stylesheet" href="plug-in/ace/assets/css/bootstrap-editable.css"/>
<script src="plug-in/ace/assets/js/bootstrap.min.js"></script>
<script src="plug-in/ace/assets/js/bootstrap-table.js"></script>
<script src="plug-in/ace/assets/js/bootstrap-table-zh-CN.min.js"></script>
<script src="plug-in/ace/assets/js/bootstrap-editable.js"></script>
<script src="plug-in/ace/assets/js/x-editable/bootstrap-table-editable.js"></script>