java 我怎样才能重新打包一个 jar 文件及其所有依赖项？
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How could I repack a jar file with all of its dependencies?
提问by zw324
I am developing an application which is supposed to run standalone. However, this project involves a .jar file which contains a lot of dependencies, and if I simply distribute this .jar file with the application, it won't work.
我正在开发一个应该独立运行的应用程序。但是，这个项目涉及一个.jar 文件，其中包含很多依赖项，如果我简单地将这个.jar 文件与应用程序一起分发，它将无法工作。
I wonder if there is any way in which I could unpack the file, add the dependencies and repack it again? I hope there are some automatic mechanism for this, since the manual process could take hours, and there might be other referenced jar files.
我想知道是否有任何方法可以解压缩文件，添加依赖项并重新打包？我希望有一些自动机制，因为手动过程可能需要几个小时，并且可能还有其他引用的 jar 文件。
P.S. I am using Eclipse, but since I am going to deploy this project with Web Start, exporting the project with the build-in export tool might not be a good idea since my attempts all ended up with ClassNotFoundException, so I suspect I might have to pack the project into several jars.
PS 我正在使用 Eclipse，但由于我将使用 Web Start 部署此项目，因此使用内置导出工具导出项目可能不是一个好主意，因为我的尝试都以ClassNotFoundException告终，所以我怀疑我可能有将项目打包成几个罐子。
Thanks!
谢谢！
采纳答案by thunderflower
回答by MrE
Repacking an unpacked JAR is a little frustrating because of the folder structure
由于文件夹结构的原因，重新打包解压的 JAR 有点令人沮丧
When unpacking with:
打开包装时：
jar xvf JAR_NAME.jar
you get a JAR_NAME/folder
你得到一个JAR_NAME/文件夹
To repack the JAR:
重新打包 JAR：
remove old jar
rm JAR_NAME.jarget inside the folder
cd JAR_NAMEpack the jar referencing the parent folder
jar cf ../JAR_NAME.jar *
取出旧罐子
rm JAR_NAME.jar进入文件夹
cd JAR_NAME打包引用父文件夹的 jar
jar cf ../JAR_NAME.jar *
and you will end up with the JAR_NAME.jarin the parent folder, where the original was unpacked from, without the first folder level you would get if you had packed the folder itself.
并且您最终将JAR_NAME.jar在父文件夹中，原始文件夹从中解压缩，如果您打包文件夹本身，则没有第一个文件夹级别。
回答by HariKishore
Yes unpacking and packing will irritate you sometimes especially in Linux environments like Ubuntu,
是的，有时拆包和打包会让你感到恼火，尤其是在像 Ubuntu 这样的 Linux 环境中，
Before unpacking make sure your Java_Home and path is exported to the folder as below : In your home directory, you will most likely have a file called .bashrc. Go to the end of the file and add the following
在解包之前，请确保您的 Java_Home 和路径已导出到以下文件夹： 在您的主目录中，您很可能有一个名为 .bashrc 的文件。转到文件末尾并添加以下内容
export JAVA_HOME=<path to your JDK install e.g. /opt/jdk>
export PATH=$JAVA_HOME/bin:$PATH
This sets your JAVA_HOME environment variable - commonly used by Java-based applications. It then prepends that directory to your PATH variable. The operating system understands PATH as a list of the parent directories of executable files.
这将设置您的 JAVA_HOME 环境变量 - 通常由基于 Java 的应用程序使用。然后将该目录添加到您的 PATH 变量中。操作系统将 PATH 理解为可执行文件的父目录列表。
Now unpack jar xvf JAR_NAME.jar
Packing backjar cf JAR_NAME.jar *
现在拆箱jar xvf JAR_NAME.jar
包装回来jar cf JAR_NAME.jar *
回答by anstue
For Spring Boot 2.1.9.RELEASE I managed to unpack and re-pack the fat jar like this: Move into the folder with the jar file.
对于 Spring Boot 2.1.9.RELEASE，我设法像这样解压并重新打包 fat jar：移动到包含 jar 文件的文件夹中。
Extract jar file
解压jar文件
jar xvf app.jar
Remove old jar file
删除旧的 jar 文件
rm app.jar
Create new jar file in parent dir
在父目录中创建新的 jar 文件
jar cmf0 META-INF/MANIFEST.MF ../app.jar *
m ... use a specific manifest-file
m ... 使用特定的清单文件
0 ... deactivates compression, which circumvents that the dependencies(jar-files) are compressed
0 ... 停用压缩，从而避免压缩依赖项（jar 文件）
Documentation can also be found here: https://docs.oracle.com/javase/tutorial/deployment/jar/build.html
文档也可以在这里找到：https: //docs.oracle.com/javase/tutorial/deployment/jar/build.html
回答by KrzyH
Have you tried "Export runnable jar" in eclipse? It should works for you.
您是否尝试过在 Eclipse 中“导出可运行的 jar”？它应该适合你。
Take a look at this picture:
看看这张照片：
