Compile means that you need the JAR for compiling and running the app. For a web application, as an example, the JAR will be placed in the WEB-INF/lib directory. Provided means that you need the JAR for compiling, but at run time there is already a JAR provided by the environment so you don't need it packaged with your app. For a web app, this means that the JAR file will not be placed into the WEB-INF/lib directory. For a web app, if the app server already provides the JAR (or its functionality), then use "provided" otherwise use "compile".

这是参考资料。

如果jar文件类似于可执行的spring启动jar文件，那么所有依赖关系的范围必须编译为包括所有jar文件。

但如果jar文件用于其他包或应用程序，则不需要在jar文件中包含所有依赖项，因为这些包或应用程序本身可以提供其他依赖项。

对于jar文件，区别在于MANIFEST中列出的类路径。如果在maven-jar-plugin配置中将addClassPath设置为true，则jar中包含MF文件。'compile'依赖项将出现在清单中，'provided'依赖项不会出现。

我最讨厌的是这两个词的时态相同。要么编译并提供，要么编译并提供。

编译

在类路径中可用，如果是普通jar，不要将此依赖项添加到final jar;但是如果最终的jar是一个单独的jar(例如，可执行的jar)，则将这个jar添加到jar中。

提供

依赖项将在运行时环境中可用，所以在任何情况下都不要添加此依赖项;甚至不是在单个jar(即可执行jar等)中

Compile means that you need the JAR for compiling and running the app. For a web application, as an example, the JAR will be placed in the WEB-INF/lib directory. Provided means that you need the JAR for compiling, but at run time there is already a JAR provided by the environment so you don't need it packaged with your app. For a web app, this means that the JAR file will not be placed into the WEB-INF/lib directory. For a web app, if the app server already provides the JAR (or its functionality), then use "provided" otherwise use "compile".

这是参考资料。

如果您计划生成一个包含其所有依赖项的JAR文件(典型的xxxx-all.jar)，那么提供的范围很重要，因为这个范围内的类不会打包到生成的JAR中。

更多信息请参见maven-assembly-plugin