iText:将html和css转换为iText

Question

我正在尝试将HTML转换为PDF。首先，我通过以下链接将HTML代码转换为XHTML。http://www.cruto.com/resources/code-generators/code-converters/html-to-xhtml.asp

然后，为了测试它，我用生成的XHTML代码创建了一个HTML文件，并在浏览器上成功显示。在那之后，我尝试用下面的java代码将HTML文件转换成PDF。

public static final String DEST = "C:/Users/Turgut/Desktop/test12.pdf";
public static final String[] HTML = { "C:/Users/Turgut/Desktop/New Text Document (5).html", "C:/Users/Turgut/Desktop/New Text Document (5).html" };

public static void main(String[] args) {

    File file = new File(DEST);
    file.getParentFile().mkdirs();
    new TestHtmlToPdf().createPdf(DEST);
}

public void createPdf(String file) {
    Document document = new Document();
    try {
        //String HTML = "C:/Users/Turgut/Desktop/test12.html";
        PdfWriter.getInstance(document, new FileOutputStream(file));
        document.open();
        String css = readCSS();
        for (String htmlfile : HTML) {
            String html = Utilities.readFileToString(htmlfile);
            ElementList list = XMLWorkerHelper.parseToElementList(html, css);
            for (Element e : list) {
                document.add(e);
            }
            document.newPage();
        }
        document.close();
    }
    catch(IOException e) {
        e.printStackTrace();
    }
    catch(DocumentException ex) {
        ex.printStackTrace();
    }
}

private String readCSS() throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte[] buffer = new byte[1024];
    int length;
    InputStream is = XMLWorkerHelper.class.getResourceAsStream("/default.css");
    while ((length = is.read(buffer)) != -1) {
        baos.write(buffer, 0, length);
    }
    return new String(baos.toByteArray());
}

我在head标签中有一个样式标签，如下所示。

<style type="text/css">
                body {
                background-color: #FFFFFF;
                font-family: 'Tahoma', "Times New Roman", Times, serif;
                font-size: 11px;
                color: #666666;
                }
                h1, h2 {
                padding-bottom: 3px;
                padding-top: 3px;
                margin-bottom: 5px;
                color : #000000;
                text-transform: uppercase;
                font-family: Arial, Helvetica, sans-serif;
                }
                h5 {
                padding-bottom: 0px;
                padding-top: 0px;
                margin-top: 0px;
                margin-bottom: 0px;
                color : #000000;
                font-style: normal;
                font-family: Arial, Helvetica, sans-serif;
                font-size: 1em;
                text-transform:none;
                }
                h5x {
                padding-bottom: 0px;
                padding-top: 0px;
                margin-top: 0px;
                margin-bottom: 0px;
                color : #000000;
                font-style: bold;
                font-family: Arial, Helvetica, sans-serif;
                font-size: 1em;
                text-transform:none;
                }                   
                h6 {
                padding-bottom: 0px;
                padding-top: 0px;
                margin-top: 0px;
                margin-bottom: 0px;
                color : #666666;
                font-style: normal;
                font-family: Arial, Helvetica, sans-serif;
                font-size: 1em;
                text-transform:none;
                }

                h1 {
                font-size: 1.4em;
                text-transform:none;
                }
                h2 {
                font-size: 1em;
                color: brown;
                }
                h3 {
                font-size: 1em;
                color: #333333;
                text-align: justify;
                margin: 0;
                padding: 0;
                }
                h4 {
                font-size: 1.4em;
                font-style: bold;
                font-family: Arial, Helvetica, sans-serif;
                color: #000000;
                margin: 0;
                padding: 0;
                }
                h4x {
                font-size: 1.4em;
                font-style: bold;
                font-family: Arial, Helvetica, sans-serif;
                color: #666666;
                margin: 0;
                padding: 0;
                }
                hr {
                height:2px;
                color: #000000;
                background-color: #000000;
                border-bottom: 1px solid #000000;
                }
                p, ul, ol {
                margin-top: 1.5em;
                }
                ul, ol {
                margin-left: 3em;
                }
                blockquote {
                margin-left: 3em;
                margin-right: 3em;
                font-style: italic;
                }
                a {
                text-decoration: none;
                color: #70A300;
                }
                h7 {
                font-size: 1.1em;
                font-style: bold;
                font-family: Arial, Helvetica, sans-serif;
                color: #000000;
                margin: 0;
                padding: 0;
                }
                a:hover {
                border: none;
                color: #70A300;
                }
                #customerPartyTable {
                border-width: 1px;
                border-spacing: 0px;
                border-style: solid;
                border-color: #FFFFFF; 
                border-collapse: collapse;
                background-color: #FFFFFF
                }
                #lineTable {
                border-width:2px;
                border-spacing:;
                border-style: solid;
                border-color: #000000; 
                border-collapse: collapse;
                background-color:;
                }
                #lineTableTd {
                border-width: 1px; 
                padding: 1px;
                border-style:  none solid none none;
                border-color: black;
                background-color: white;
                }
                #lineTableTh {
                border-width: 1px; 
                padding: 1px;
                border-style:  none solid none none;
                background-color: white;
                }
                #lineTableTrx {
                border-width: 0px; 
                padding: 0px;
                border-style: solid;
                border-color: #000000;
                background-color: white;
                -moz-border-radius:;
                }
                #lineTableThx {
                border-width: 1px; 
                padding: 1px;
                border-style:  none solid solid none;
                background-color: white;
                }
                #lineTableTr {
                border-width: 0px; 
                padding: 0px;
                border-style: solid;
                border-color: #000000;
                background-color: white;
                -moz-border-radius:;
                }
                #lineTableBudgetTd {
                border-width: 0px;  
                border-spacing:0px;
                padding: 1px;
                border-style: solid;
                border-color: #000000; 
                background-color: white;
                -moz-border-radius:;
                }                    
                table {
                border-spacing:0px;
                }
                td {
                border-color:#000000; 
                }</style>

有没有从HTML文件生成PDF文件的问题，但我不能读取css块我猜。因为，PDF文件和HTML文件是不一样的。在PDF文件中，某些文本的颜色与HTML文件不同。

如何使用css生成PDF文件？谢谢你的建议。

Answer 1

    ByteArrayInputStream html = new ByteArrayInputStream(FileUtils.readFileToByteArray(new File(htmlSource)));
    ByteArrayInputStream css = new ByteArrayInputStream(FileUtils.readFileToByteArray(new File(cssSource)));
    html = getHtmlByteArrayStream(); //this is only for my picture not neccessary 
    // step 1
    Document document = new Document();
    // step 2
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(destPdf));
    writer.setInitialLeading(12);
    // step 3
    document.open();

    // step 4
    XMLWorkerHelper.getInstance().parseXHtml(writer, document, html, css);

    // step 5
    document.close();

我就是这么做的。