项目在Eclipse中工作，但打包在罐子中后无法工作 [英] Project works in eclipse but not after being packaged in a jar

问题描述

我的项目使用itext7创建PDF文件.当我从eclipse启动时，一切运行正常.当我将其包装为罐子时，一切正常，直到我要创建PDF为止.然后我得到:

My project uses itext7 to create PDF files. When I launch from eclipse everything works perfectly. When I package it as a jar, everything works until I get to the point that I want to create a PDF. I then get:

线程"JavaFX Application Thread"中的异常com.itextpdf.io.IOException:I/O异常.
.....

Exception in thread "JavaFX Application Thread" com.itextpdf.io.IOException: I/O exception.
.....

原因:java.io.FileNotFoundException:C:\ Users \ puser \ eclipse-workspace \ Document \ target \ SE001-0.1.1-SNAPSHOT.jar \ img \ Safety.png(系统找不到指定的路径)

Caused by: java.io.FileNotFoundException: C:\Users\puser\eclipse-workspace\Document\target\SE001-0.1.1-SNAPSHOT.jar\img\Safety.png (The system cannot find the path specified)

项目文件夹将图像保存在src/main/resources/img.一旦创建了jar，它的根目录就简单地带有/img.这意味着您不能仅指定直接路径，因为它会在创建jar时发生变化. JavaFX Images可以正常使用.

The project folder keeps the images at src/main/resources/img. Once the jar is created it simply has /img at root. This means you can't just specify a direct path because it changes when the jar is made. JavaFX Images work fine with..

Image user = new Image(getClass().getResourceAsStream("/img/Document.png"));

将它与itext7一起使用不起作用，因为ImageDataFactory.create()正在寻找byte []，并且这是输入流.

Using that with itext7 doesn't work because ImageDataFactory.create() is looking for byte[] and that is an input stream.

现在尝试使用:

Image safetyImage = new Image(ImageDataFactory.create(System.getProperty("user.dir") + "/img/Safety.png"));

不起作用，因为Jar不在路径内.

Does not work because the Jar is not inside the path.

我可以用来指向jar中的图像文件并将其与ext7一起使用吗?

What can I use to point to an image file inside the jar and use it with it ext7?

推荐答案

mkl是正确的，谢谢！

mkl was correct and thank you!

我创建了一个实用程序方法来将输入流转换为字节数组.

I created a utility method to convert an input steam to a byte array.

   public static byte[] toByteArray(InputStream in) throws IOException {
          //InputStream is = new BufferedInputStream(System.in);
          ByteArrayOutputStream os = new ByteArrayOutputStream();
          byte [] buffer = new byte[1024];
          int len;
          // read bytes from the input stream and store them in buffer
            while ((len = in.read(buffer)) != -1) {
                // write bytes from the buffer into output stream
                os.write(buffer, 0, len);
            }
            return os.toByteArray();
       }

然后我在ImageDataFactory.create()方法中使用了该实用程序.

I then used that utility inside the ImageDataFactory.create() method.

Image safetyImage = new Image(ImageDataFactory.create(toByteArray(getClass().getResourceAsStream("/img/Safety.png"))));

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