grails - 如何使用 Intellij Idea 让 OpenCv 与 Grails 3 一起工作？

Question

我无法让 OpenCV 与 Grails 一起工作。我有以下错误：

no opencv_java2413 in java.library.path

我在 "C:\opencv" 中安装了最新的 OpenCV (2.4.13)，并添加了以下 Gradle 依赖项：

compile files('libs/opencv-2413.jar')

并编辑了运行配置： 但我仍然得到同样的错误（试图清理，重建......）

Answer 1

GOT IT! Add a ton of logging to my vv.Hello.java class (IDK if this works with groovy or not) What the HELL is the "files" directory?
Where did that come from GRAILS GURUS? I put my DLL in there & it just worked. haha. mine is the 310 yours will be 24x.

EDIT: Turns out the .dll has to be in BOTH, files dir & the system PATH. Add the sample code snippet to see where the locations are for your system (ie: if you're running jetty or something.) put the DLL in both. then run it. To get it to run from IntelliJ I had to drop the dll in this system dir:

C:\Windows\System32\WindowsPowerShell\v1.0\ and here: user.dir=C:\grdev\hwopencv\files\ see below. GitHub sample of what I got working

https://github.com/kmacpher67/grails-opencv-sample/blob/master/README.md

My motto is: "When in doubt, log the crap of everything, till there's enough log files to crash the o/s and end the futility!"

System.out.println("Welcome to OpenCV " + Core.VERSION); System.out.println("Welcome to OpenCV NATIVE_LIBRARY_NAME= " + Core.NATIVE_LIBRARY_NAME); String opencvpath = System.getProperty("user.dir") + "\\files\\"; System.out.println("user.dir="+opencvpath); String libPath = System.getProperty("java.library.path"); System.out.println("libPath="+libPath); System.load(opencvpath + Core.NATIVE_LIBRARY_NAME + ".dll");

I got a love-hate relationship with libs. When they do magic for you, love them! When they do this to me. Thanks for motivating me to figure this out!

NOTE2: I got this working from groovy too! Use a different static loader syntax (see sample controller method index1 Runtime.getRuntime().load0(groovy.lang.GroovyClassLoader.class, path)

Answer 2

它可能没有找到jar文件？我是那种破坏构建的专家，你能试着把它作为绝对路径而不是相对路径吗？

compile files('c:/opencv/libs/opencv-2413.jar')

顺便说一句：你有没有遵循任何具体的指南或食谱？我希望有一个简单的插件已经完成，它使用事件处理或其他东西将其作为服务，这些可能是非确定性的长时间运行过程，不适合网页响应时间。编辑添加图像：所以我 d/l 3.1 版本。这就像 grails 2x 与 3.x 的决定，我都使用过，我认为 3.x 有更多的功能，而且绝对足够稳定。就像 grails 一样，那里有很多 2.x 的人。使用 IDEA 导入 Eclipse 项目。他们有一个不是 gradle 或 grails 的“ant”示例，但基本的 java 版本工作表明这是一个类路径或 .dll 源路径问题。我将尝试构建一个简单的硬件 grails 示例，看看是否可以编译它。您是否能够获得一个基本的仅限 java 的示例来工作？