无法使用Ghost4J加载库'gs'

问题描述

我正在尝试使用Ghost4J将PDF转换为PNG。我知道人们之前已经问过这个问题，但不是OS X 10以及Ghost4J的最新版本。

我已经按照zippy1978的回答中的说明从这里开始了：

我已经关注了

如何我可以在OS X 10.9上使用ghost4j

我已经用并尝试过。

我继续收到此错误：

  servlet的Servlet.service（） [dispatcherServlet]中的con带有路径[]的文本引发异常[处理程序处理失败;嵌套异常是java.lang.UnsatisfiedLinkError：无法加载库'gs'：dlopen（libgs.dylib，9）：image not found] with root cause 
 
 java.lang.UnsatisfiedLinkError：无法加载library'gs'：dlopen（libgs.dylib，9）：图片未找到
 at com.sun.jna.NativeLibrary.loadLibrary（NativeLibrary.java:166）
 at com.sun.jna.NativeLibrary .getInstance（NativeLibrary.java:239）
 at com.sun.jna.Library $ Handler。< init>（Library.java:140）
 at com.sun.jna.Native.loadLibrary（ Native.java:393）
 at com.sun.jna.Native.loadLibrary（Native.java:378）
 at org.ghost4j.GhostscriptLibraryLoader.loadLibrary（GhostscriptLibraryLoader.java:39）
在org.ghost4j.GhostscriptLibrary。< clinit>（GhostscriptLibrary.java:34）
 at org.ghost4j.Ghostscript.initialize（Ghostscript.java:323）
 at org.ghost4j.renderer.SimpleRenderer。在org.ghost4j.renderer.AbstractRemoteRenderer.render上运行（SimpleRenderer.java:105）
（AbstractRemot eRenderer.java:86）
 at org.ghost4j.renderer.AbstractRemoteRenderer.render（AbstractRemoteRenderer.java:70）
 at com.xxxx.yyyy.controller.rest.yyyyyController.zzzz（yyyyyController.java： 182）
  

我在这里缺少什么？

我的控制器崩溃的代码是这个（我标记了行）：

  // imgSrc是PDF in Base 64和输出文件是File 
 
 byte [] imageByte; 
 BASE64Decoder decoder = new BASE64Decoder（）; 
 imageByte = decoder.decodeBuffer（imgSrc）; 
 outputfile = new File（image.pdf）; 
 OutputStream fop = new FileOutputStream（outputfile）; 
 fop.write（imageByte）; 
 fop.flush（）; 
 fop.close（）; 
 PDFDocument document = new PDFDocument（）; 
 document.load（outputfile）; 
 SimpleRenderer renderer = new SimpleRenderer（）; 
 renderer.setResolution（300）; 
 List images = renderer.render（document）; // CRASH TAKES PLACE HERE *** 
 outputfile = new File（image.png）; 
 ImageIO.write（（RenderedImage）images.get（0），png，outputfile）; 
  

解决方案

所以我已经弄明白了！

我在中找到了答案：

这会引发一条警告消息：

  log4j：WARN找不到记录器（slideselector.facedata.FaceDataParser）的appender。 
 log4j：WARN请正确初始化log4j系统。 
  

这是通过以下方式解决的：

I am trying to use Ghost4J in order to turn a PDF into a PNG. I am aware that people have asked this before, but not with OS X 10 and with the latest release of Ghost4J.

I have followed the instructions listed in zippy1978's answer from here: PDF to image using Java

I have followed everything from the Ghost4J page

I also have tried both answers from here: How can i use ghost4j on OS X 10.9

And I have installed Ghostscript with Port and have tried from Richard Koch's website.

I continue to get this error:

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler processing failed; nested exception is java.lang.UnsatisfiedLinkError: Unable to load library 'gs': dlopen(libgs.dylib, 9): image not found] with root cause

java.lang.UnsatisfiedLinkError: Unable to load library 'gs': dlopen(libgs.dylib, 9): image not found
    at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:166)
    at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:239)
    at com.sun.jna.Library$Handler.<init>(Library.java:140)
    at com.sun.jna.Native.loadLibrary(Native.java:393)
    at com.sun.jna.Native.loadLibrary(Native.java:378)
    at org.ghost4j.GhostscriptLibraryLoader.loadLibrary(GhostscriptLibraryLoader.java:39)
    at org.ghost4j.GhostscriptLibrary.<clinit>(GhostscriptLibrary.java:34)
    at org.ghost4j.Ghostscript.initialize(Ghostscript.java:323)
    at org.ghost4j.renderer.SimpleRenderer.run(SimpleRenderer.java:105)
    at org.ghost4j.renderer.AbstractRemoteRenderer.render(AbstractRemoteRenderer.java:86)
    at org.ghost4j.renderer.AbstractRemoteRenderer.render(AbstractRemoteRenderer.java:70)
    at com.xxxx.yyyy.controller.rest.yyyyyController.zzzz(yyyyyController.java:182)

What am I missing here?

The code from my Controller that is crashing is this (I marked the line):

// imgSrc is the PDF in Base 64 and output file is a File

byte[] imageByte;
BASE64Decoder decoder = new BASE64Decoder();
imageByte = decoder.decodeBuffer(imgSrc);
outputfile = new File("image.pdf");
OutputStream fop = new FileOutputStream(outputfile);
fop.write(imageByte);
fop.flush();
fop.close();
PDFDocument document = new PDFDocument();
document.load(outputfile);
SimpleRenderer renderer = new SimpleRenderer();
renderer.setResolution(300);
List images = renderer.render(document);       //CRASH TAKES PLACE HERE ***
outputfile = new File("image.png");
ImageIO.write((RenderedImage) images.get(0), "png", outputfile);

解决方案

So I have figured it out!

I found the answer in this conversation:

This caused a warning message:

log4j:WARN No appenders could be found for logger (slideselector.facedata.FaceDataParser).
log4j:WARN Please initialize the log4j system properly.

Which was solved by the help of: How to initialize log4j properly?

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