Flying Saucer库是否支持Google App-Engine？

Question

I am trying to create PDF from HTML file in my application . 我正在尝试在我的应用程序中从HTML文件创建PDF。 My Entire Application is working on Google App-Engine(GAE) for java. 我的整个应用程序正在使用Google App-Engine（GAE）for java。
Does Flying Saucer library support for GAE? 飞碟库是否支持GAE？

Please send me solution, if anybody know it. 如果有人知道，请给我解决方案。

Answer 1

Java7 Java7

Flying Saucer uses Abstract Window Toolkit (java.awt.*) which is restricted in AppEngine Java 7 Runtime Environment . Flying Saucer使用在AppEngine Java 7运行时环境中受限制的Abstract Window Toolkit（java.awt。*）。 Attempting to use Flying Source gives: 试图使用Flying Source给出：

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. 但是，Flying Sourcer可用于AppEngine灵活环境。

Java8 In AppEngine Java 8 Runtime Evnvironment , Flying Saucer works like a charm. Java8在AppEngine Java 8 Runtime Evnvironment中，Flying Saucer就像一个魅力。

Answer 2

What Flying Saucer needs is a well formed XML (in this case, your html) to create the pdf export file. Flying Saucer需要的是一个格式良好的XML（在这种情况下，你的html）来创建pdf导出文件。 Since GAE supports servlets 由于GAE支持servlet

https://developers.google.com/appengine/docs/java/#Java_Requests_and_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. 在servlet中包含飞碟引擎可能并不困难。 Something like this 像这样的东西

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();
}
    }

} }

Flying Saucer库是否支持Google App-Engine？

问题描述

2 个解决方案

解决方案1
2 2016-11-07 17:29:43

解决方案2
-2 2013-09-11 07:22:28

Flying Saucer库是否支持Google App-Engine？

问题描述

2 个解决方案

解决方案1 2 2016-11-07 17:29:43

解决方案2 -2 2013-09-11 07:22:28

解决方案1
2 2016-11-07 17:29:43

解决方案2
-2 2013-09-11 07:22:28