Java mac OS X 上的 Tess4j 不满意链接错误
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Tess4j unsatisfied link error on mac OS X
提问by nestrocuation
Hey i am trying to use tess4j for tesseract and having this issue for eclipse on mac osx .
嘿，我正在尝试将 tess4j 用于 tesseract，并且在 mac osx 上遇到了 eclipse 的这个问题。
My tesseract is working fine from terminal but trying to run tess4j through tesseract throws me an error .
我的 tesseract 从终端工作正常，但尝试通过 tesseract 运行 tess4j 会引发错误。
java.lang.UnsatisfiedLinkError: Unable to load library 'tesseract': Native library (darwin/libtesseract.dylib)
java.lang.UnsatisfiedLinkError：无法加载库“tesseract”：本机库（darwin/libtesseract.dylib）
i do have tessetact dylib and its named libtesseract.dylib in my opt/local/lib which i installed using macport .
我的 opt/local/lib 中确实有 tessetact dylib 及其命名的 libtesseract.dylib，我使用 macport 安装了它。
Thanks for your help
谢谢你的帮助
回答by nguyenq
回答by maresa
I know it's an old post. I had this problem too recently when I tried to use Tess4J. However, I managed to find a way around it. I've written a post about it http://www.microshell.com/programming/java/performing-optical-character-recognition-in-java/
我知道这是一个旧帖子。我最近在尝试使用Tess4J. 但是，我设法找到了解决方法。我写了一篇关于它的帖子http://www.microshell.com/programming/java/performing-optical-character-recognition-in-java/
In short, the problem is because tess4j-2.0.0.jardoesn't include MacOS library. So I just modified the maven cached jar on mine by doing these steps:
简而言之，问题是因为tess4j-2.0.0.jar不包含 MacOS 库。所以我只是通过执行以下步骤修改了我的 maven 缓存 jar：
cd /Users/user/.m2/repository/net/sourceforge/tess4j/tess4j/2.0.0(adjust the directory where your tess4j JAR file resides)mkdir darwinjar uf tess4j-2.0.0.jar darwincp /opt/local/lib/libtesseract.3.dylib darwin/libtesseract.dylibjar uf tess4j-2.0.0.jar darwin/libtesseract.dylibjar tf tess4j-2.0.0.jar(to verify that the file is included)
cd /Users/user/.m2/repository/net/sourceforge/tess4j/tess4j/2.0.0（调整 tess4j JAR 文件所在的目录）mkdir darwinjar uf tess4j-2.0.0.jar darwincp /opt/local/lib/libtesseract.3.dylib darwin/libtesseract.dylibjar uf tess4j-2.0.0.jar darwin/libtesseract.dylibjar tf tess4j-2.0.0.jar（验证文件是否包含在内）
I was then able to run my Java program after I modify the tess4j-2.0.0.jarfile. Below is my MacOS version.
然后我就可以在修改tess4j-2.0.0.jar文件后运行我的 Java 程序。下面是我的 MacOS 版本。
user@laptop:~$ uname -a
Darwin Maresas-MacBook-Pro.local 14.3.0 Darwin Kernel Version 14.3.0: Mon Mar 23 11:59:05 PDT 2015; root:xnu-2782.20.48~5/RELEASE_X86_64 x86_64
回答by Andrew Neilson
This is exactly what I was after today, so thanks for the Q&A above. As one additional step beyond what maresa mentioned, I ran into this error after fixing the one you asked about:
这正是我今天所追求的，所以感谢上面的问答。作为 maresa 提到的额外步骤，我在修复了您所询问的错误后遇到了这个错误：
java.lang.UnsatisfiedLinkError: dlopen(/var/folders/sq/rh89_ntd7jqdlv9__25zj9dr0000gp/T/jna--913086793/jna8800789057827590119.tmp, 9): Library not loaded: /usr/local/lib/libjpeg.8.dylib
Referenced from: /usr/local/lib/liblept.4.dylib
Reason: image not found
So to fix this I needed to set up a symlink for libjpeg.8.dylib:
所以为了解决这个问题，我需要为 libjpeg.8.dylib 设置一个符号链接：
ln -s /usr/local/Cellar/jpeg/8d/lib/libjpeg.8.dylib /usr/local/lib/libjpeg.8.dylib
Not sure if there is a way to do this without the symlink (i.e. package it in the jar), but I hope this helps anyone else who is looking at this post.
不确定是否有办法在没有符号链接的情况下执行此操作（即将其打包在 jar 中），但我希望这可以帮助正在查看这篇文章的其他人。
回答by Michael Miklavcic
I had a very similar issue with Ghost4j, i.e.
我有一个与 Ghost4j 非常相似的问题，即
InvocationTargetException: Unable to load library 'gs': Native library (darwin/libgs.dylib) not found in resource path
Instead of modifying jar files, point jna to the appropriate lib path by setting jna.library.path. In Eclipse, you need to set the system property in run configurations - SO answer for this here - https://stackoverflow.com/a/862405/2163229
不要修改 jar 文件，而是通过设置将 jna 指向适当的 lib 路径jna.library.path。在 Eclipse 中，您需要在运行配置中设置系统属性 - 所以在这里回答 - https://stackoverflow.com/a/862405/2163229
If you're using Maven exec:
如果您使用的是 Maven exec：
mvn -Djna.library.path=/opt/local/lib/ exec:java -Dexec.mainClass="foo.bar.NativeThingy"
or
或者
export MAVEN_OPTS="-Djna.library.path=/opt/local/lib/" && mvn exec:java -Dexec.mainClass="foo.bar.NativeThingy"
Obviously, set the path to wherever your libs are installed. In my case, I ran $ locate libgs.dyliband found the above path.
显然，将路径设置为安装库的位置。就我而言，我运行$ locate libgs.dylib并找到了上述路径。
References:https://jna.java.net/javadoc/com/sun/jna/NativeLibrary.html
参考资料：https : //jna.java.net/javadoc/com/sun/jna/NativeLibrary.html
回答by Long Nguyen
You need install the tesseract lib on your Mac.
您需要在 Mac 上安装 tesseract 库。
brew install tesseract --with-all-languages
brew install tesseract --with-all-languages
