自定义插件无法从jar复制文件，因为协议是“jar”。 [英] Custom plugin can't copy files from jar because protocol is "jar"
问题描述
我正在为SonarQube开发一个插件，它必须做的部分是将文件从自身复制到SonarQube服务器的目录。我正在使用Apache Commons IO，并且发现 FileUtils.copyDirectory 运行得非常好（在使用main方法测试之后）。
麻烦来了从尝试获取我想要从插件本身的jar中复制的文件的目录。我试过这个：
I am developing a plugin for SonarQube, and part of what it must do is copy files from itself to the SonarQube Server's directory. I am using Apache Commons IO, and have found that FileUtils.copyDirectory works wonderfully (after testing it with a main method).
The trouble comes from trying to get the directory of files that I want to copy from the jar of the plugin itself. I have tried this:
public File getSrcDir() {
URL inputUrl = getClass().getResource("/images");
File srcDir = FileUtils.toFile(inputUrl);
System.out.println(srcDir);
return srcDir;
}
当我在IDE（Eclipse）中的main方法中运行它时，它打印出 C：\ ... \ [项目目录] \ target \classes \ images
但是当我将插件安装到SonarQube中时在Sonar的plugins文件夹中的一个jar文件夹中，此方法打印出 null 。
我调查并发现 FileUtils。如果url参数具有File以外的协议，则toFile（URL url）将返回null。所以我将这一行添加到我的方法中： System.out.println（inputUrl.getProtocol（））;
果然，在我的IDE中协议是文件，但是当我的插件安装时，协议是jar！
b $ b我花了最后一天倒在Stack Overflow和Google试图找到一种方法来处理有了这个，但无济于事。
我愿意尝试/重构任何东西。
我想做的就是让我的插件从内部复制一个目录它的罐子到SonarQube的服务器。
我怎么能这样做？
如果它是相关的，这是我项目中的目录（我想复制images文件夹及其中的所有内容）：
When I run it in a main method in my IDE (Eclipse), it prints out C:\...\[Project Directory]\target\classes\images
But when I install the plugin into SonarQube as a jar folder in Sonar's "plugins" folder, this method prints out null.
I investigated and found that FileUtils.toFile(URL url) will return null if the url argument has a protocol other than "File". So I added this line to my method: System.out.println(inputUrl.getProtocol());
Sure enough, in my IDE the protocol is "file", but when my plugin is installed the protocol is "jar"!
I have spent the last day pouring over Stack Overflow and Google trying to find a way to deal with this, but to no avail.
I am willing to try/refactor anything.
All I want to do is make it so that my plugin copies a directory from within its jar to SonarQube's Server.
How can I do this?
In case it's relevant, here is the directory within my project (I want to copy the "images" folder and everything in it):
[Project Directory]
|
+--/src/main/resources
|
+--images
|
+--profiles
|
+--awards
| |
| +--Award1.png
| |
| +--Award2.png
|
+--projects
|
+--default.png
这里是要在SonarQube中复制的目录服务器：
[SONARQUBE_HOME] / war / sonar-server / images
And here is the directory to copy to in the SonarQube server:
[SONARQUBE_HOME]/war/sonar-server/images
推荐答案
当classpath中的资源（在本例中是图像或目录）来自jar时，它不再是物理文件
When resource (in this case images or directory) in classpath coming from jar, it is no longer a physical file
你需要修改代码所以它从 Stream 中读取这些资源而不是文件
You need to modify the code so that it reads those resources from Stream instead of File
参见
- How to read file from classpath from
Stream - Get a list of resources from classpath directory
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