private synchronized void init() throws IOException {
// Need the extra test, to avoid throwing an IOException from the Transcoder
if (imageInput == null) {
throw new IllegalStateException("input == null");
}
if (reader == null) {
WMFTranscoder transcoder = new WMFTranscoder();
ByteArrayOutputStream output = new ByteArrayOutputStream();
Writer writer = new OutputStreamWriter(output, "UTF8");
try {
TranscoderInput in = new TranscoderInput(IIOUtil.createStreamAdapter(imageInput));
TranscoderOutput out = new TranscoderOutput(writer);
// TODO: Transcodinghints?
transcoder.transcode(in, out);
} catch (TranscoderException e) {
throw new IIOException(e.getMessage(), e);
}
reader = new SVGImageReader(getOriginatingProvider());
reader.setInput(
ImageIO.createImageInputStream(new ByteArrayInputStream(output.toByteArray())));
}
}
public TestReport encode(URL srcURL, FileOutputStream fos) {
DefaultTestReport report = new DefaultTestReport(this);
try {
ImageTranscoder transcoder = getTestImageTranscoder();
TranscoderInput src = new TranscoderInput(svgURL.toString());
TranscoderOutput dst = new TranscoderOutput(fos);
transcoder.transcode(src, dst);
return null;
} catch (TranscoderException e) {
StringWriter trace = new StringWriter();
e.printStackTrace(new PrintWriter(trace));
report.setErrorCode(ERROR_CANNOT_TRANSCODE_SVG);
report.setDescription(
new TestReport.Entry[] {
new TestReport.Entry(
Messages.formatMessage(ENTRY_KEY_ERROR_DESCRIPTION, null),
Messages.formatMessage(
ERROR_CANNOT_TRANSCODE_SVG,
new String[] {
svgURL.toString(), e.getClass().getName(), e.getMessage(), trace.toString()
}))
});
} catch (Exception e) {
StringWriter trace = new StringWriter();
e.printStackTrace(new PrintWriter(trace));
report.setErrorCode(ERROR_CANNOT_TRANSCODE_SVG);
report.setDescription(
new TestReport.Entry[] {
new TestReport.Entry(
Messages.formatMessage(ENTRY_KEY_ERROR_DESCRIPTION, null),
Messages.formatMessage(
ERROR_CANNOT_TRANSCODE_SVG,
new String[] {
svgURL.toString(), e.getClass().getName(), e.getMessage(), trace.toString()
}))
});
}
report.setPassed(false);
return report;
}
/**
* Show a "Save as" dialog.
*
* @param plot The plot to be exported.
* @param width The width of the exported image (when export to JPEG/PNG).
* @param height The height of the exported image (when export to JPEG/PNG).
* @return Result from {@link JFileChooser#showSaveDialog}
*/
public static int showSaveDialog(SVGPlot plot, int width, int height) {
double quality = 1.0;
int ret = -1;
JFileChooser fc = new JFileChooser(new File("."));
fc.setDialogTitle(DEFAULT_TITLE);
// fc.setFileFilter(new ImageFilter());
SaveOptionsPanel optionsPanel = new SaveOptionsPanel(fc, width, height);
fc.setAccessory(optionsPanel);
ret = fc.showSaveDialog(null);
fc.setDialogTitle("Saving... Please wait.");
if (ret == JFileChooser.APPROVE_OPTION) {
File file = fc.getSelectedFile();
String format = optionsPanel.getSelectedFormat();
if (format == null || automagic_format.equals(format)) {
format = guessFormat(file.getName());
}
try {
if (format == null) {
showError(fc, "Error saving image.", "File format not recognized.");
} else if ("jpeg".equals(format) || "jpg".equals(format)) {
quality = optionsPanel.getJPEGQuality();
plot.saveAsJPEG(file, width, height, quality);
} else if ("png".equals(format)) {
plot.saveAsPNG(file, width, height);
} else if ("ps".equals(format)) {
plot.saveAsPS(file);
} else if ("eps".equals(format)) {
plot.saveAsEPS(file);
} else if ("pdf".equals(format)) {
plot.saveAsPDF(file);
} else if ("svg".equals(format)) {
plot.saveAsSVG(file);
} else {
showError(fc, "Error saving image.", "Unsupported format: " + format);
}
} catch (java.lang.IncompatibleClassChangeError e) {
showError(
fc,
"Error saving image.",
"It seems that your Java version is incompatible with this version of Batik and Jpeg writing. Sorry.");
} catch (ClassNotFoundException e) {
showError(
fc,
"Error saving image.",
"A class was not found when saving this image. Maybe installing Apache FOP will help (for PDF, PS and EPS output).\n"
+ e.toString());
} catch (IOException e) {
LOG.exception(e);
showError(fc, "Error saving image.", e.toString());
} catch (TranscoderException e) {
LOG.exception(e);
showError(fc, "Error saving image.", e.toString());
} catch (TransformerFactoryConfigurationError e) {
LOG.exception(e);
showError(fc, "Error saving image.", e.toString());
} catch (TransformerException e) {
LOG.exception(e);
showError(fc, "Error saving image.", e.toString());
} catch (Exception e) {
LOG.exception(e);
showError(fc, "Error saving image.", e.toString());
}
} else if (ret == JFileChooser.ERROR_OPTION) {
showError(fc, "Error in file dialog.", "Unknown Error.");
} else if (ret == JFileChooser.CANCEL_OPTION) {
// do nothing - except return result
}
return ret;
}
/**
* hightchart导出图片
*
* @param request
* @param response
* @throws IOException
*/
@RequestMapping(params = "export")
public void export(HttpServletRequest request, HttpServletResponse response) throws IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
String type = request.getParameter("type");
String svg = request.getParameter("svg");
String filename = request.getParameter("filename");
filename = filename == null ? "chart" : filename;
ServletOutputStream out = response.getOutputStream();
try {
if (null != type && null != svg) {
svg = svg.replaceAll(":rect", "rect");
String ext = "";
Transcoder t = null;
if (type.equals("image/png")) {
ext = "png";
t = new PNGTranscoder();
} else if (type.equals("image/jpeg")) {
ext = "jpg";
t = new JPEGTranscoder();
} else if (type.equals("application/pdf")) {
ext = "pdf";
t = (Transcoder) new PDFTranscoder();
} else if (type.equals("image/svg+xml")) ext = "svg";
response.addHeader(
"Content-Disposition",
"attachment; filename="
+ new String(filename.getBytes("GBK"), "ISO-8859-1")
+ "."
+ ext);
response.addHeader("Content-Type", type);
if (null != t) {
TranscoderInput input = new TranscoderInput(new StringReader(svg));
TranscoderOutput output = new TranscoderOutput(out);
try {
t.transcode(input, output);
} catch (TranscoderException e) {
out.print("Problem transcoding stream. See the web logs for more details.");
e.printStackTrace();
}
} else if (ext.equals("svg")) {
// out.print(svg);
OutputStreamWriter writer = new OutputStreamWriter(out, "UTF-8");
writer.append(svg);
writer.close();
} else out.print("Invalid type: " + type);
} else {
response.addHeader("Content-Type", "text/html");
out.println(
"Usage:\n\tParameter [svg]: The DOM Element to be converted."
+ "\n\tParameter [type]: The destination MIME type for the elment to be transcoded.");
}
} finally {
if (out != null) {
out.flush();
out.close();
}
}
}
