iText HTML 到 PDF 具有不需要的背景颜色

问题描述 投票：0回答：1

我试图使用 iText 和 Java 将 HTML 转换为 PDF 文件。但是，由于标签 <body> 背景属性，我的 PDF 文件有一个颜色不同的区域。 PDF 文件应具有与 <div class='container'> 类相同的全白背景。有没有什么方法可以实现它而不是将 <body> 背景更改为白色？

enter image description here

这是我的 HTML 和 CSS 

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        @page {
            margin-left: 0;
            margin-right: 0;
            margin-top: 0;

            @bottom-left {
                margin-left: 10px;
                content: "Page " counter(page) " / " counter(pages);
            }
        }

        body {
            scroll-behavior: smooth;
            color: #000;
            font-weight: normal;
            background: #f0f0f0;
            background-color: rgb(244, 180, 103);
            width: 100%;
            line-height: 20pt;
            text-align: justify;
            margin: 0 auto;
            height: 100%;
        }

        @media print {
            body {
                background-color: #fff;
            }
        }

        .container {
            scroll-behavior: smooth;
            width: 210mm;
            padding: 25mm 25mm 25mm 35mm;
            background: #FFF;
            margin: 0 auto;
            box-sizing: border-box;
            position: relative;
            font-size: 14pt;
            height: 100%;
        }
    </style>
</head>

<body>
    <div class="container">
        <h1>CONTAINER</h1>
        <p>This is my data</p>
        <p>This is my data</p>
        <p>This is my data</p>
        <p>This is my data</p>
        <p>This is my data</p>
        <p>This is my data</p>
        <p>This is my data</p>
        <p>This is my data</p>
    </div>
</body>

</html>

这是我的Java代码

private static final String HTML_FILE_PATH = "C:/yourlocation/input.html";
private static final String PDF_FILE_PATH = "C:/yourlocation/output.pdf";

public static void main(String[] args) throws IOException {
    System.out.println("Hello World!");

    FontProvider fontProvider = new DefaultFontProvider(true, true, true);
    ConverterProperties properties = new ConverterProperties();
    properties.setCharset("UTF-8");
    properties.setFontProvider(fontProvider);

    File htmlFile = new File(HTML_FILE_PATH);
    File pdfFile = new File(PDF_FILE_PATH);
    try (FileInputStream fStream = new FileInputStream(htmlFile)) {
        System.out.println("BEGIN to convert HTML to PDF");
        HtmlConverter.convertToPdf(fStream, new FileOutputStream(pdfFile), properties);
        System.out.println("FINISHED convert HTML to PDF");

    } catch (IOException e) {
        e.printStackTrace();
    }
}
css itext
1个回答
0
投票

好的，所以我可以使用 iText 通过扩展 BodyTagCssApplier 更改 <body> 标签的背景颜色，覆盖，复制整个 apply 方法并将其背景颜色（在下面的 cssProps 中）设置为白色。

private static class CustomBodyTagCssApplier extends BodyTagCssApplier {
    @Override
    public void apply(ProcessorContext context, IStylesContainer stylesContainer, ITagWorker tagWorker) {
        Map<String, String> cssProps = stylesContainer.getStyles();
        // Set background-color to white
        cssProps.put(CommonCssConstants.BACKGROUND_COLOR, "#fff");
        BodyHtmlStylesContainer styleProperty = new BodyHtmlStylesContainer();
        IPropertyContainer container = tagWorker.getElementResult();
        if (container != null) {
            BackgroundApplierUtil.applyBackground(cssProps, context, styleProperty);
            MarginApplierUtil.applyMargins(cssProps, context, styleProperty);
            PaddingApplierUtil.applyPaddings(cssProps, context, styleProperty);
            BorderStyleApplierUtil.applyBorders(cssProps, context, styleProperty);
            if (styleProperty.hasStylesToApply()) {
                container.setProperty(Html2PdfProperty.BODY_STYLING, styleProperty);
            }
            FontStyleApplierUtil.applyFontStyles(cssProps, context, stylesContainer, container);
        }
    }
}

然后使用 ConverterProperties 将该 CSS 应用于我的 <body> 标签

public static void main(String[] args) {
    // Some code in question above
    ConverterProperties properties = new ConverterProperties();
    properties.setCssApplierFactory(new DefaultCssApplierFactory() {
        @Override
        public ICssApplier getCustomCssApplier(IElementNode tag) {
            if ("body".equals(tag.name())) {
                return new CustomBodyTagCssApplier();
            }
            return null;
        }
    });
    // Some code in question above
    // HtmlConverter.convertToPdf(fStream, new FileOutputStream(pdfFile), properties);
}
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