我有一个 .svg 文件来创建一个地图，该地图将具有与边界相关的侦听器（我猜它称为可伸缩矢量图形的“节点”）。但是，我正在尝试将此文件添加为 JPanel 上的 BufferedImage。（我是关于摇摆组件的新手，所以如果您有更好的想法，请分享）。此外，我使用了Batik库并阅读了一些有关它的信息，并使用此代码示例将这个 .svg 文件作为 BufferedImage
package org.pulpcore.tools.res;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import org.apache.batik.dom.svg.SVGDOMImplementation;
import org.apache.batik.transcoder.TranscoderException;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.TranscodingHints;
import org.apache.batik.transcoder.image.ImageTranscoder;
import org.apache.batik.util.SVGConstants;
import org.apache.commons.io.FileUtils;
public class SVGRasterizer {
/**
Rasterizes an SVG file using Batik.
@param svgFile The svg file.
@return The rasterized image.
@throws IOException if the svg file could not be rasterized.
*/
public static BufferedImage rasterize(File svgFile) throws IOException {
final BufferedImage[] imagePointer = new BufferedImage[1];
// Rendering hints can't be set programatically, so
// we override defaults with a temporary stylesheet.
// These defaults emphasize quality and precision, and
// are more similar to the defaults of other SVG viewers.
// SVG documents can still override these defaults.
String css = "svg {" +
"shape-rendering: geometricPrecision;" +
"text-rendering: geometricPrecision;" +
"color-rendering: optimizeQuality;" +
"image-rendering: optimizeQuality;" +
"}";
File cssFile = File.createTempFile("batik-default-override-", ".css");
FileUtils.writeStringToFile(cssFile, css);
TranscodingHints transcoderHints = new TranscodingHints();
transcoderHints.put(ImageTranscoder.KEY_XML_PARSER_VALIDATING, Boolean.FALSE);
transcoderHints.put(ImageTranscoder.KEY_DOM_IMPLEMENTATION,
SVGDOMImplementation.getDOMImplementation());
transcoderHints.put(ImageTranscoder.KEY_DOCUMENT_ELEMENT_NAMESPACE_URI,
SVGConstants.SVG_NAMESPACE_URI);
transcoderHints.put(ImageTranscoder.KEY_DOCUMENT_ELEMENT, "svg");
transcoderHints.put(ImageTranscoder.KEY_USER_STYLESHEET_URI, cssFile.toURI().toString());
try {
TranscoderInput input = new TranscoderInput(new FileInputStream(svgFile));
ImageTranscoder t = new ImageTranscoder() {
@Override
public BufferedImage createImage(int w, int h) {
return new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
}
@Override
public void writeImage(BufferedImage image, TranscoderOutput out)
throws TranscoderException {
imagePointer[0] = image;
}
};
t.setTranscodingHints(transcoderHints);
t.transcode(input, null);
}
catch (TranscoderException ex) {
// Requires Java 6
//throw new IOException("Couldn't convert " + svgFile, ex);
ex.printStackTrace();
throw new IOException("Couldn't convert " + svgFile);
}
finally {
cssFile.delete();
}
return imagePointer[0];
}
}
这是我使用 GUI 组件的课程，也是我尝试使用 BufferedImage 的部分
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class JRisk {
private JFrame mainMap;
public JRisk() throws IOException{
initComponents();
}
private void initComponents() throws IOException{
mainMap = new JFrame();
mainMap.setResizable(false);
JPanel mainPanel = new JPanel();
File riskMap = new File("src\\src\\risk.svg");
BufferedImage bufImage = SVGRasterizer.rasterize(riskMap);
mainMap.setIconImage(bufImage);
mainMap.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainMap.add(mainPanel);
mainMap.pack();
mainMap.setVisible(true);
}
}
最后，包含 main 方法的测试程序。
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.SwingUtilities;
public class Test {
/**
* @param argsh
*/
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
try {
new JRisk();
} catch (IOException ex) {
Logger.getLogger(Test.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
}
}
那么我的问题是编译器给出了一个错误
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/w3c/dom/svg/SVGDocument
整个错误是
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at org.apache.batik.dom.svg.SVGDOMImplementation.createDocument(Unknown Source)
at org.apache.batik.dom.util.SAXDocumentFactory.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:506)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:376)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:602)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3063)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:881)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:607)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:116)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:488)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:835)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1210)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:568)
at org.apache.batik.dom.util.SAXDocumentFactory.createDocument(Unknown Source)
at org.apache.batik.dom.util.SAXDocumentFactory.createDocument(Unknown Source)
at org.apache.batik.dom.svg.SAXSVGDocumentFactory.createDocument(Unknown Source)
at org.apache.batik.dom.svg.SAXSVGDocumentFactory.createDocument(Unknown Source)
at org.apache.batik.transcoder.XMLAbstractTranscoder.transcode(Unknown Source)
at org.apache.batik.transcoder.SVGAbstractTranscoder.transcode(Unknown Source)
at src.SVGRasterizer.rasterize(SVGRasterizer.java:74)
at src.JRisk.initComponents(JRisk.java:31)
at src.JRisk.<init>(JRisk.java:17)
at src.Test$1.run(Test.java:24)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
at java.awt.EventQueue.access$000(EventQueue.java:101)
at java.awt.EventQueue$3.run(EventQueue.java:666)
at java.awt.EventQueue$3.run(EventQueue.java:664)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.ClassNotFoundException: org.w3c.dom.svg.SVGDocument
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
... 51 more
如果您能就这个话题提供帮助，即使有有用的建议，我将不胜感激！无论如何谢谢