将html转换为字节数组java中的图像
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4437806/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
convert html to image in byte array java
提问by cls
How can i easily convert html to image and then to byte array without create it
我如何轻松地将 html 转换为图像，然后转换为字节数组而不创建它
thanks
谢谢
回答by Wouter Lievens
This is nontrivial because rendering a HTML page can be quite complex: you have text, images, CSS, possibly even JavaScript to evaluate.
这很重要，因为渲染 HTML 页面可能非常复杂：您需要评估文本、图像、CSS，甚至可能是 JavaScript。
I don't know the answer, but I do have something that might help you: code for iText (a PDF writing library) to convert a HTML page to a PDF file.
我不知道答案，但我确实有一些可以帮助你的东西：iText（一个 PDF 编写库）的代码，用于将 HTML 页面转换为 PDF 文件。
public static final void convert(final File xhtmlFile, final File pdfFile) throws IOException, DocumentException
{
final String xhtmlUrl = xhtmlFile.toURI().toURL().toString();
final OutputStream reportPdfStream = new FileOutputStream(pdfFile);
final ITextRenderer renderer = new ITextRenderer();
renderer.setDocument(xhtmlUrl);
renderer.layout();
renderer.createPDF(reportPdfStream);
reportPdfStream.close();
}
回答by dacwe
If you do not have any complex html you can render it using a normal JLabel. The code below will produce this image:
如果您没有任何复杂的 html，您可以使用普通的JLabel. 下面的代码将生成此图像：
<html>
<h1>:)</h1>
Hello World!<br>
<img src="http://img0.gmodules.com/ig/images/igoogle_logo_sm.png">
</html>
public static void main(String... args) throws IOException {
String html = "<html>" +
"<h1>:)</h1>" +
"Hello World!<br>" +
"<img src=\"http://img0.gmodules.com/ig/images/igoogle_logo_sm.png\">" +
"</html>";
JLabel label = new JLabel(html);
label.setSize(200, 120);
BufferedImage image = new BufferedImage(
label.getWidth(), label.getHeight(),
BufferedImage.TYPE_INT_ARGB);
{
// paint the html to an image
Graphics g = image.getGraphics();
g.setColor(Color.BLACK);
label.paint(g);
g.dispose();
}
// get the byte array of the image (as jpeg)
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(image, "jpg", baos);
byte[] bytes = baos.toByteArray();
....
}
If you would like to just write it to a file:
如果您只想将其写入文件：
ImageIO.write(image, "png", new File("test.png"));
回答by Edwin Pomayay Yaranga
I think you can use the library
我想你可以使用图书馆
html2image-0.9.jar
html2image-0.9.jar
you can download this library at this page: http://code.google.com/p/java-html2image/
你可以在这个页面下载这个库：http: //code.google.com/p/java-html2image/
回答by phil
What about using an in memory ByteArrayStreaminstead of a FileOutputStreamin the code above? That would be a byte array, at least ...
在上面的代码中使用内存ByteArrayStream而不是 aFileOutputStream怎么样？那将是一个字节数组，至少......
