Does Flying Saucer library support for Google App-Engine?
Question
I am trying to create PDF from HTML file in my application . My Entire Application is working on Google App-Engine(GAE) for java.
Does Flying Saucer library support for GAE?
Please send me solution, if anybody know it.
2 answers
solution1
2 2016-11-07 17:29:43
Java7
Flying Saucer uses Abstract Window Toolkit (java.awt.*) which is restricted in AppEngine Java 7 Runtime Environment . Attempting to use Flying Source gives:
java.lang.NoClassDefFoundError: Could not initialize class org.xhtmlrenderer.pdf.ITextOutputDevice
at org.xhtmlrenderer.pdf.ITextRenderer.<init>(ITextRenderer.java:102)
at org.xhtmlrenderer.pdf.ITextRenderer.<init>(ITextRenderer.java:98)
However, Flying Sourcer is usable in AppEngine flexible environment.
Java8 In AppEngine Java 8 Runtime Evnvironment , Flying Saucer works like a charm.
solution2
-2 2013-09-11 07:22:28
What Flying Saucer needs is a well formed XML (in this case, your html) to create the pdf export file. Since GAE supports servlets
https://developers.google.com/appengine/docs/java/#Java_Requests_and_servlets
Might not be dificult to include the flying Saucer engine within a servlet. Something like this
import java.io.IOException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class MyFSServlet extends HttpServlet {
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
try {
StringBuffer buf = new StringBuffer();
buf.append("<html YOUR HTML CODE HERE>"); //could be retrieve from somewhere else
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(new StringBufferInputStream(buf.toString()));
ITextRenderer renderer = new ITextRenderer();
renderer.setDocument(doc, null);
renderer.layout();
OutputStream os = resp.getOutputStream();
renderer.createPDF(os);
os.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.