java de.laures。cewolf IIOException:无法创建输出流

4 月 Questions & Answers 919

我知道这是一个漫长的过程，几乎没有什么可以继续的，但是有人知道是什么导致了Cewolf图像渲染的异常吗

我想知道cewolf是否期望有任何特定的位置/路径/文件夹或权限

localhost。日志

de.laures.cewolf.util.Renderer.renderChart

系统错误。日志

javax.imageio.IIOException: Can't create output stream

SEVERE: CewolfServlet: Can't create output stream!
de.laures.cewolf.ChartRenderingException: Can't create output stream!
    at de.laures.cewolf.util.Renderer.renderChart(Renderer.java:120)
...

Caused by: javax.imageio.IIOException: Can't create output stream!
    at javax.imageio.ImageIO.write(ImageIO.java:1560)
    at org.jfree.chart.encoders.SunPNGEncoderAdapter.encode(SunPNGEncoderAdapter.java:128)
    at org.jfree.chart.encoders.EncoderUtil.writeBufferedImage(EncoderUtil.java:137)
    at org.jfree.chart.ChartUtilities.writeChartAsPNG(ChartUtilities.java:176)
    at de.laures.cewolf.util.Renderer.handlePNG(Renderer.java:142)
    at de.laures.cewolf.util.Renderer.renderChart(Renderer.java:108)
    ... 37 more
Caused by: javax.imageio.IIOException: Can't create cache file!
    at javax.imageio.ImageIO.createImageOutputStream(ImageIO.java:397)
    at javax.imageio.ImageIO.write(ImageIO.java:1558)
    ... 42 more
Caused by: java.io.IOException: The system cannot find the path specified
    at java.io.WinNTFileSystem.createFileExclusively(Native Method)
    at java.io.File.checkAndCreate(File.java:1705)
    at java.io.File.createTempFile0(File.java:1726)
    at java.io.File.access$100(File.java:120)
    at java.io.File$1.createTempFile(File.java:1955)
    at sun.misc.IOUtils.createTempFile(IOUtils.java:88)
    at javax.imageio.stream.FileCacheImageOutputStream.<init>(FileCacheImageOutputStream.java:71)
    at com.sun.imageio.spi.OutputStreamImageOutputStreamSpi.createOutputStreamInstance(OutputStreamImageOutputStreamSpi.java:50)
    at javax.imageio.ImageIO.createImageOutputStream(ImageIO.java:393)
    ... 43 more
26-Sep-2013 03:38:26 org.apache.catalina.core.ApplicationContext log

这是在我的机器上工作，但不是在我刚刚安装的新机器上，但我没有做任何不同的事情

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java de.laures。cewolf IIOException:无法创建输出流

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