blocks|key|1211822|text|看看The+Java+EPS+Graphics2D+package吧。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1211823|许多Java程序使用Graphics2D在屏幕上绘制内容，虽然将输出保存为png或jpeg文件很容易，但要将其导出为|1211824|以包含在文档或论文中就有点困难了。|blockquote|1211825|1211826|这个包使得整个过程变得非常简单，因为您可以像使用Graphics2D对象一样使用EpsGraphics2D对象。唯一的区别是，所有实现的方法都会创建EPS输出，这意味着您绘制的图表可以调整大小，而不会导致调整基于像素的图像时可能会看到的任何锯齿状边缘。|1211827|entityMap|0|LINK|mutability|MUTABLE|url|http://www.jibble.org/epsgraphics/^0|2|V|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|6|7|X|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|Y|8|@]|9|@]|C|$]]|$1|I|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|10|8|@]|9|@]|C|$]]|$1|L|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|M|$N|$5|O|P|Q|C|$R|S]]]]

Have a look at <a href="http://www.jibble.org/epsgraphics/" rel="noreferrer">The Java EPS Graphics2D package</a>.
<blockquote>
Many Java programs use Graphics2D to draw stuff on the screen, and while it is easy to save the output as a png or jpeg file, it is a little harder to export it as an EPS for including in a document or paper.
This package makes the whole process extremely easy, because you can use the EpsGraphics2D object as if it's a Graphics2D object. The only difference is that all of the implemented methods create EPS output, which means the diagrams you draw can be resized without leading to any of the jagged edges you may see when resizing pixel-based images, such as JEPG and PNG files.
</blockquote>

blocks|key|690156|text|Apache+Batik将允许您绘制到Graphics2D对象的特定实现，然后导出为可缩放矢量图形(.svg)文件。然后，您可以使用支持SVG的浏览器查看/处理/打印它(Firefox将在本地处理它，ISTR、IE和其他浏览器可以使用插件)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|690157|请参阅SVGGraphics2D对象(流程记录的here)|690158|entityMap|0|LINK|mutability|MUTABLE|url|http://xmlgraphics.apache.org/batik/|1|http://xmlgraphics.apache.org/batik/javadoc/org/apache/batik/svggen/SVGGraphics2D.html|2|http://xmlgraphics.apache.org/batik/using/svg-generator.html^0|7|5|0|0|3|D|1|O|4|2|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]]|C|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]|$A|Z|B|10|1|11]]|C|$]]|$1|F|3|-4|5|6|7|12|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]|P|$5|I|J|K|C|$L|Q]]]]

Apache <a href="http://xmlgraphics.apache.org/batik/" rel="noreferrer">Batik</a> will let you paint to a specialised implementation of a Graphics2D object and then export as an scalable vector graphics (.svg) file. You can then view/process/print it using an SVG-enabled browser (Firefox will handle it nativly, ISTR, IE and others can use plugins).

See the <a href="http://xmlgraphics.apache.org/batik/javadoc/org/apache/batik/svggen/SVGGraphics2D.html" rel="noreferrer">SVGGraphics2D</a> object (process documented <a href="http://xmlgraphics.apache.org/batik/using/svg-generator.html" rel="noreferrer">here</a>)

blocks|key|4753546|text|Pierre提到的Java+EPS看起来不错，但如果不是这样，您可能还想看看FreeHEP+Vector+Graphics。为了允许Java在高能物理领域重用，它包括一个矢量图形包，通过Graphics2D的实现完成。多年来，我们一直使用它来非常成功地导出EPS。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4753547|entityMap|0|LINK|mutability|MUTABLE|url|http://java.freehep.org/vectorgraphics^0|12|N|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

The Java EPS mentioned by Pierre looks good, but if it isn't you might also like to look at <a href="http://java.freehep.org/vectorgraphics" rel="nofollow noreferrer">FreeHEP Vector Graphics</a>. Written to allow Java reuse in the High Energy Physics field it includes a vector graphics package, done through an implementation of Graphics2D. We've used it to export EPS very successfull for a number of years.

blocks|key|1211852|text|我可以推荐VectorGraphics2D库(LGPL)。虽然它不支持Graphics2D的所有功能，但我在我的项目中成功地使用了它。它为各种矢量文件格式提供了java.awt.Graphics2D的实现。它只需将所有绘制操作导出为EPS、SVG或PDF文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1211853|entityMap|0|LINK|mutability|MUTABLE|url|http://trac.erichseifert.de/vectorgraphics2d/^0|5|G|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I can recommend the <a href="http://trac.erichseifert.de/vectorgraphics2d/" rel="nofollow">VectorGraphics2D</a> library (LGPL). Although it does not support all the features of Graphics2D, I used it successfully for my project. It provides implementations of java.awt.Graphics2D for various vector file formats. It simply exports all paint operations to EPS, SVG, or PDF files.

blocks|key|3909878|text|为有相同需求的人提供的其他库：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3909879|http://www.jfree.org/jfreesvg/|offset|length|3909880|for+PDF中的|unordered-list-item|3909881|，http://object-refinery.com/orsonpdf/index.html|3909882|中的OrsonPDF|3909883|3909884|通过在JFreeChart和Orson+Charts中的广泛使用，这两种GPLv3都经过了良好的测试。|3909885|entityMap|0|LINK|mutability|MUTABLE|url|1|http://object-refinery.com/orsonpdf/index.html|2|http://www.jfree.org/jfreechart/|3|http://object-refinery.com/orsoncharts/index.html^0|0|0|U|0|0|0|1|1A|1|0|0|0|3|A|2|E|C|3|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@]|9|@$D|14|E|15|1|16]]|A|$]]|$1|F|3|G|5|H|7|17|8|@]|9|@]|A|$]]|$1|I|3|J|5|H|7|18|8|@]|9|@$D|19|E|1A|1|1B]]|A|$]]|$1|K|3|L|5|6|7|1C|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1E|8|@]|9|@$D|1F|E|1G|1|1H]|$D|1I|E|1J|1|1K]]|A|$]]|$1|P|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|C]]|W|$5|S|T|U|A|$V|X]]|Y|$5|S|T|U|A|$V|Z]]|10|$5|S|T|U|A|$V|11]]]]

Additional libraries for people with the same requirement:

<ul>
<li>for SVG, JFreeSVG at <a href="http://www.jfree.org/jfreesvg/" rel="nofollow">http://www.jfree.org/jfreesvg/</a></li>
<li>for PDF, OrsonPDF at <a href="http://object-refinery.com/orsonpdf/index.html" rel="nofollow">http://object-refinery.com/orsonpdf/index.html</a></li>
</ul>

Both of these GPLv3 and well tested via extensive usage in <a href="http://www.jfree.org/jfreechart/" rel="nofollow">JFreeChart</a> and <a href="http://object-refinery.com/orsoncharts/index.html" rel="nofollow">Orson Charts</a>.

blocks|key|690358|text|FreeHEP似乎工作得很好，尽管它似乎不再被维护，它的bug和论坛页面也消失了。只需几行代码，您就会得到一个弹出对话框，可以将任何组件保存为各种可伸缩的常规图像格式。我们有一些具有挑战性的图像，使用alpha通道，旋转的文本，由曲线限定的区域，它们保存得很好，使用VectorGraphics2D要好得多。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|690359|到目前为止，我看到的唯一问题是jpeg+save，它对我所有的图像都是黑色的。这对我们来说并不是很重要，因为png可以工作，再加上所有的矢量模式，但我相信这对一些人来说是一个问题。|690360|为了在所有这些模式下保存，我不得不添加这么多代码：|690361|public+static+void+showImage(Component+comp)+
{
++++try
++++{
++++++++ExportDialog+export+=+new+ExportDialog();
++++++++export.showExportDialog(+null,+"Export+view+as+...",+comp,+"export"+);
++++++++System.err.println("Image+save+complete");

++++}
++++catch(Exception+e)
++++{
++++++++e.printStackTrace();
++++}
}|code-block|syntax|javascript|690362|还必须添加一大堆库jars。|690363|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|R|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

FreeHEP seems to work quite well although it does not appear to be maintained anymore and its bug and forum pages are gone. With just a handful of lines you get a popup dialog that can save any component to a variety of scalable and regular image formats. We have some challenging images, using alpha channel, rotated text, areas bounded by curves, and they saved perfectly, much better with with VectorGraphics2D. 

The only problem I've seen so far is in jpeg save, which comes out black for all my images. This isn't very important for us given that png works, plus all the vector modes, but I'm sure it would be an issue for some. 

I had to add exactly this much code to save in all these modes:

<pre><code>public static void showImage(Component comp) 
{
 try
 {
 ExportDialog export = new ExportDialog();
 export.showExportDialog( null, "Export view as ...", comp, "export" );
 System.err.println("Image save complete");

 }
 catch(Exception e)
 {
 e.printStackTrace();
 }
}
</code></pre>

There are a bunch of library jars that must be added as well.

blocks|key|690189|text|这基本上是不可能直接实现的，因为低级java+api是以光栅(像素)为单位工作的，并且从不以矢量格式存储。(请查看java.awt.Graphics的接口，了解我的意思)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|690190|有一些通用的程序可以将栅格转换为矢量格式，这是我在快速搜索中找到的一个：http://autotrace.sourceforge.net/index.html|offset|length|690191|因此，使用这样的程序，您可以将您的问题分成两个较小的问题：|690192|690193|在文件上自动跟踪将JPanel转换为位图或文件。|ordered-list-item|690194|690195|entityMap|0|LINK|mutability|MUTABLE|url|http://autotrace.sourceforge.net/index.html^0|0|10|17|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@$D|W|E|X|1|Y]]|A|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|11|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

this is basically not possible directly, as the low level java api works in terms of raster (pixels) and is never stored in vector format.
(Check the API of java.awt.Graphics to see what I mean).

there are some general purpose program that convert raster to vector formats, this is one I found on a quick search:
<a href="http://autotrace.sourceforge.net/index.html" rel="nofollow noreferrer">http://autotrace.sourceforge.net/index.html</a>

so, using such a program you can divide your problem into two smaller problems:

<ol>
<li>convert your JPanel into a bitmap or file (<a href="http://www.jguru.com/faq/view.jsp?EID=242020" rel="nofollow noreferrer">http://www.jguru.com/faq/view.jsp?EID=242020</a>)</li>
<li>run autotrace on the file.</li>
</ol>

I would like to export the image in my JPanel to a vector graphics file so it can be edited and printed at a higher-than-screen resolution. Essentially I want its <code>paint()</code> function to be called with a destination Graphics that saves the drawing commands into a vector graphic file.

What is a good, simple way to do this? What libraries are recommended? Which vector format would be best, and why?

Export JPanel to vector graphics

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想将JPanel中的图像导出为矢量图形文件，以便能够以高于屏幕的分辨率进行编辑和打印。从本质上讲，我希望它的paint()函数通过一个目标图形被调用，该目标图形将绘图命令保存到矢量图形文件中。什么是一个好的，简单的方法呢？推荐哪些库？哪种矢量格式最好，为什么？

问将JPanel导出为矢量图形
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