Question

我正在尝试在GAE托管的项目中生成PDF文件。

目前，我使用iText，它可以正常创建纯文本PDF。

我真的需要在我的pdf上添加图片。当我尝试使用iText时，我会听到一些关于AWT和谷歌白名单的Execption：

Uncaught exception from servlet
java.lang.NoClassDefFoundError: java.awt.color.ICC_Profile is a restricted class. Please see the Google App Engine developer's guide for more details.
    at com.google.apphosting.runtime.security.shared.stub.java.awt.color.ICC_Profile.<clinit>(ICC_Profile.java)
    at com.lowagie.text.pdf.codec.PngImage.readPng(Unknown Source)
    at com.lowagie.text.pdf.codec.PngImage.getImage(Unknown Source)
    at com.lowagie.text.pdf.codec.PngImage.getImage(Unknown Source)
    at com.lowagie.text.pdf.codec.PngImage.getImage(Unknown Source)
    at com.lowagie.text.Image.getInstance(Unknown Source)
    at com.dooapp.jwsPlateforme.services.licence.PdfPrinterImpl.print(PdfPrinterImpl.java:19)
    at $PdfPrinter_128f4d9a1bb.print($PdfPrinter_128f4d9a1bb.java)
    at com.dooapp.jwsPlateforme.servlet.PdfServlet.doGet(PdfServlet.java:36)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
    at org.apache.tapestry5.TapestryFilter.doFilter(TapestryFilter.java:129)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:97)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
    at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:238)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:326)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
    at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
    at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:135)
    at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:250)
    at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5838)
    at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5836)
    at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24)
    at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:398)
    at com.google.net.rpc.impl.Server$2.run(Server.java:852)
    at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56)
    at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:576)
    at com.google.net.rpc.impl.Server.startRpc(Server.java:807)
    at com.google.net.rpc.impl.Server.processRequest(Server.java:369)
    at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:442)
    at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319)
    at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290)
    at com.google.net.async.Connection.handleReadEvent(Connection.java:474)
    at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:831)
    at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:207)
    at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:103)
    at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251)
    at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:413)
    at java.lang.Thread.run(Unknown Source)

您知道是否有允许在GAE上添加PDF图片的库吗？

注意：我尝试使用iText-gae，但它会得到相同的异常

感谢的

Answer 1

我建议你在无头模式下启动你的JVM，但是，对GAE来说，这没什么兴趣。

无论如何，由于iText存在这些问题，似乎至少有一个项目 - 恰当地命名为iText-gae - 试图应对这些问题。甚至看起来修补版本可能是downloaded from the web。但要注意，使用它需要您自担风险！

Answer 2

您需要使用iText中包含的图像库，例如，在此片段中我将图像插入单元格中。

   import com.lowagie.text.Image;
   import com.lowagie.text.pdf.PdfPCell;

   Image img = Image.getInstance("/YOUR IMAGE ROUTE/");
   PdfPCell uno = new PdfPCell(img, true);

我知道这个问题已经很久了，但将来可能会有所帮助。

在JAVA上使用Google App Engine上的图片生成PDF

2 个答案: