本篇文章给大家介绍html转pdf的方式。有一定的参考价值，有需要的朋友可以参考一下，希望对大家有所帮助。
1、准备资源
itext.jar
www.baidu.comhtml2canvas.js
www.baidu.com2、前端代码：
//进行截图操作，document.querySelector("body") 为要截图的区域function test() {html2canvas(document.querySelector("body"), {onrendered: function (canvas) {var dataUrl = canvas.toDataURL('image/png');var formData = new FormData(); //模拟表单对象formData.append("imgData", convertBase64UrlToBlob(dataUrl)); //写入数据var xhr = new XMLHttpRequest(); //数据传输方法xhr.open("POST", "http://localhost:8080/pdf"); //配置传输方式及地址xhr.send(formData);xhr.onreadystatechange = function () { //回调函数};}});}//格式化图片base64编码转换为byte文件流function convertBase64UrlToBlob(urlData){//去掉url的头，并转换为bytevar bytes=window.atob(urlData.split(',')[1]);//处理异常,将ascii码小于0的转换为大于0var ab = new ArrayBuffer(bytes.length);var ia = new Uint8Array(ab);for (var s = 0;s<bytes.length;s++){ia[s] = bytes.charCodeAt(s);}return new Blob( [ab] , {type : 'image/png'});}<body onclick="test()">//调用截图方法即可3、后端代码：
@RequestMapping(value = "/pdf",method = RequestMethod.POST)public void test(MultipartHttpServletRequest request, HttpServletResponse response) throws IOException {String filePath = "D:\\blog\\exportPdf2.pdf";String imagePath = "D:\\blog\\exportImg2.png";Document document = new Document();try{Map getMap = request.getFileMap();MultipartFile mfile = (MultipartFile) getMap.get("imgData"); //获取数据InputStream file = mfile.getInputStream();byte[] fileByte = FileCopyUtils.copyToByteArray(file);FileImageOutputStream imageOutput = new FileImageOutputStream(new File(imagePath));//打开输入流imageOutput.write(fileByte, 0, fileByte.length);//生成本地图片文件imageOutput.close();PdfWriter.getInstance(document, new FileOutputStream(filePath)); //itextpdf文件document.open();document.add(new Paragraph("JUST TEST ..."));Image image = Image.getInstance(imagePath); //itext-pdf-imagefloat heigth = image.getHeight();float width = image.getWidth();int percent = getPercent2(heigth, width); //按比例缩小图片image.setAlignment(Image.MIDDLE);image.scalePercent(percent+3);document.add(image);document.close();}catch (DocumentException de) {System.err.println(de.getMessage());}catch (Exception e) {e.printStackTrace();}}private static int getPercent2(float h, float w) {int p = 0;float p2 = 0.0f;p2 = 530 / w * 100;p = Math.round(p2);return p;}4、包名
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Controller;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;import javax.imageio.stream.FileImageOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;5、项目源码地址
https://github.com/zhangjy520/learn_java/tree/master/boot推荐学习：html视频教程
