尝试保存图像时发生异常

Question

启动Java应用程序时，尝试保存图像时出现异常。但是，在Eclipse中，一切正常。该应用程序是使用fatjar构建的，并且还选择了必需的库（jar_imageio.jar和ij.jar）进行导出。

我尝试使用ImageIO和ImageJ：

a。）ImageIO：

ImageIO.write(image, "jpg", new File(f));


Exception in thread "main" sun.misc.ServiceConfigurationError: 
javax.imageio.spi.ImageWriterSpi: 
Provider com.sun.media.imageioimpl.plugins.jpeg.CLibJPEGImageWriterSpi 
could not be instantiated: java.lang.IllegalArgumentException: vendorName == null!
    at sun.misc.Service.fail(Unknown Source)
    at sun.misc.Service.access$200(Unknown Source)
    at sun.misc.Service$LazyIterator.next(Unknown Source)
    at javax.imageio.spi.IIORegistry.registerApplicationClasspathSpis(Unknown Source)
    at javax.imageio.spi.IIORegistry.<init>(Unknown Source)
    at javax.imageio.spi.IIORegistry.getDefaultInstance(Unknown Source)
    at javax.imageio.ImageIO.<clinit>(Unknown Source)

b。）ImageJ：

IJ.saveAs(image, "jpg", f);
java.lang.NoClassDefFoundError: Could not initialize class javax.imageio.ImageIO

    at ij.plugin.JpegWriter.saveAsJpeg(JpegWriter.java:49)
    at ij.plugin.JpegWriter.save(JpegWriter.java:28)
    at ij.io.FileSaver.saveAsJpeg(FileSaver.java:340)
    at ij.io.FileSaver.saveAsJpeg(FileSaver.java:332)
    at ij.plugin.filter.Writer.run(Writer.java:24)
    at ij.plugin.filter.PlugInFilterRunner.processOneImage(PlugInFilterRunner.java:256)
    at ij.plugin.filter.PlugInFilterRunner.<init>(PlugInFilterRunner.java:105)
    at ij.IJ.runPlugIn(IJ.java:158)
    at ij.Executer.runCommand(Executer.java:127)
    at ij.Executer.run(Executer.java:64)
    at ij.IJ.run(IJ.java:249)
    at ij.IJ.run(IJ.java:296)
    at ij.IJ.saveAs(IJ.java:1579)

Answer 1

正如@Victor说的，我认为您应该看看

Exception in thread "main" sun.misc.ServiceConfigurationError: 
javax.imageio.spi.ImageWriterSpi: 
Provider com.sun.media.imageioimpl.plugins.jpeg.CLibJPEGImageWriterSpi 
could not be instantiated: java.lang.IllegalArgumentException: vendorName == null!

我昨天才遇到这个问题，这很棘手。有类似的问题在这里。我发现如果我在jar中包含了jai_imageio，并且没有修改清单文件以包含JAI清单文件的内容，或者没有在构建中将META-
INF的services文件夹中的文件合并，那么我遇到了许多与您相似的错误。我的应用程序确实可以运行，但是由于JAI是在本地安装的，所以没有包含JAI，但我暂时选择使用JAI来构建它。

打开jar，您将找到一个名为META-INF的目录。其中有文件MANIFEST.MF。我使用Maven在清单文件中包含JAI内容，因此它看起来像

Manifest-Version: 1.0
Implementation-Title: com.sun.media.imageio
Implementation-Version: 1.0_01
Built-By: myName
Specification-Vendor: Sun Microsystems, Inc.
Created-By: Apache Maven
Implementation-Vendor: Sun Microsystems, Inc.
Build-Jdk: 1.6.0_43
Specification-Title: Java Advanced Imaging Image I/O Tools
Specification-Version: 1.0-mr
Extension-Name: com.sun.media.imageio
Main-Class: myMain
Archiver-Version: Plexus Archiver

您应该在那里输入自己的名字和主要班级。如果不使用Maven（或Ant）使其工作，则可以修改此文件并在命令行上自行添加。我遇到了一个额外的问题，其中一些附带的jar覆盖了META-
INF的services文件夹中的文件。相反，我使用Maven的Shade插件合并了这些文件。