前端和java后台将HTML转换成pdf

前端和java后台将HTML转换成pdf


java后台方式:

public class HtmlToPdf {

    private final static String DEST = "C:\\80afa41a3bfc474cbf1ac8b5bc1d.pdf";	//生成pdf的路径
    private final static String SRC = "D:\\3b33a68bbf52417aac48687937352464.html";	//html文件路径
    public static final String FONT = "/font/NotoSansCJKsc-Regular.otf";	//本地字体路径(百度下载)

    public static void main(String[] args) {
        try {
            HtmlToPdf html = new HtmlToPdf();
            html.tomPdf(SRC, DEST);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * HTML转换成pdf
     * @param html html文件路径
     * @param DEST 生成pdf的路径
     * @throws Exception
     */
    public static void tomPdf(String html, String DEST) throws Exception {
        ConverterProperties props = new ConverterProperties();
        DefaultFontProvider defaultFontProvider = new DefaultFontProvider(false, false, false);
        defaultFontProvider.addFont(FONT);
        props.setFontProvider(defaultFontProvider);
        PdfWriter writer = new PdfWriter(DEST);
        PdfDocument pdf = new PdfDocument(writer);
        pdf.setDefaultPageSize(new PageSize(595.0F, 842.0F));
        Document document = HtmlConverter.convertToDocument(new FileInputStream(html), pdf, props);
        document.close();
        pdf.close();

    }

}
<!--将html转换成pdf-->
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>html2pdf</artifactId>
            <version>2.0.2</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>font-asian</artifactId>
            <version>7.1.2</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>barcodes</artifactId>
            <version>7.1.2</version>
        </dependency>

前端方式:(不推荐)
理由:分辨率并不高,且默认不支持分页

<script src="http://code.jquery.com/jquery-1.4.1.min.js"></script>
<script src="https://cdn.bootcss.com/html2canvas/0.5.0-beta4/html2canvas.js"></script>
<script src="https://cdn.bootcss.com/jspdf/1.3.4/jspdf.debug.js"></script>
$(function () {
	  //唯一需要修改的地方,将需要转换的部分添加id属性export_content
	  var target = document.getElementById("export_content");
	  
	  target.style.background = "#FFFFFF";
	  html2canvas(target, {
		onrendered:function(canvas) {
			var contentWidth = canvas.width;
			var contentHeight = canvas.height;

			//一页pdf显示html页面生成的canvas高度;
			var pageHeight = contentWidth / 592.28 * 841.89;
			//未生成pdf的html页面高度
			var leftHeight = contentHeight;
			//页面偏移
			var position = 0;
			//a4纸的尺寸[595.28,841.89],html页面生成的canvas在pdf中图片的宽高
			var imgWidth = 595.28;
			var imgHeight = 592.28/contentWidth * contentHeight;

			var pageData = canvas.toDataURL('image/jpeg', 1.0);

			var pdf = new jsPDF('', 'pt', 'a4');

			//有两个高度需要区分,一个是html页面的实际高度,和生成pdf的页面高度(841.89)
			//当内容未超过pdf一页显示的范围,无需分页
			if (leftHeight < pageHeight) {
			pdf.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight );
			} else {
				while(leftHeight > 0) {
					pdf.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight)
					leftHeight -= pageHeight;
					position -= 841.89;
					//避免添加空白页
					if(leftHeight > 0) {
					  pdf.addPage();
					}
				}
			}

			pdf.save("content.pdf");
		}
	  })
	})

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