API适用于Java应用程序，但不适用于JavaFX [英] API works with Java application but not JavaFX

问题描述

我正在使用Java和JavaFX构建软件。它生成PDF报告（使用DynamicReports），然后使用SendGrid API发送它们。我已经将SendGrid API .jar文件添加到类路径中。

I am building a software in Java and JavaFX. It generates PDF reports (with DynamicReports) then uses SendGrid API to send to send them. I have already added the SendGrid API .jar file to the classpath.

问题是当我实现我的SengGrid子类时，我的JavaFX应用程序崩溃了。如您所见：

The problem is that my JavaFX application crashes when I instanciate my subclass of SengGrid. As you can see:

Exception in thread "JavaFX Application Thread" java.lang.NoClassDefFoundError: com/sendgrid/SendGrid$Email
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)  at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at Reporting.TableReport.lambda$build$0(TableReport.java:160)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: com.sendgrid.SendGrid$Email
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 20 more

现在有趣的是，当我从非JavaFX项目调用API时，API工作正常。更有趣的是，当我从同一个JavaFX项目中的控制台主类中调用它时，它也可以工作。

Now the interesting part is that the API works perfectly when I call it from a non JavaFX project. And more interestingly, it also works when I call it from a "console" main class inside the very same JavaFX project.

到目前为止，我试图称之为控制台从我的JavaFX代码主要作为一种可以完成我的任务（发送PDF文件）的静态方法。但同样，我遇到了同样的例外。

So far, I have tried to call that "console" main from my JavaFX code as a sort of static method that would fulfill my task (sending the PDF files). But again, I encounter the very same exception.

有人可以提出解决方案来解决这个问题吗？ （或者至少绕过它）

Can anyone suggest a solution to solve this ? (or at least go around it)

推荐答案

原来这是Netbeans的一个问题。在Eclipse中使用完全相同的代码可以完美地运行。我无法找到解释，但我会给那些可能偶然遇到与我同样的问题的人提供这个答案。

Turns out it was an issue with Netbeans. Using the exact same code with Eclipse works perfectly. I couldn't find an explanation but I'm giving this answer for anyone who might stumble upon the same issue as me.

这篇关于API适用于Java应用程序，但不适用于JavaFX的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！