如何在添加 SpringBoot 配置作为标签时使用 maven-shade-plugin 的"PropertiesMergingResourceTransformer" <dependency

Question

我正在使用maven shade插件和Sprint Boot。我已经将spring-boot依赖项定义为：

<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>2.0.2.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>

我已经在pom.xml的<parent>标签中定义了我的项目特定的uber-pom，所以不能在<parent>标签中使用spring-boot-starter-parent。

现在，当我执行mvn clean install时，我得到以下异常：

`[ERROR] Failed to execute goal org.apache.maven.plugins:maven-shade-plugin:3.1.1:shade (default) on project myapp: Unable to parse configuration of mojo org.apache.maven.plugins:maven-shade-plugin:3.1.1:shade for parameter transformers: Cannot load implementation hint 'org.springframework.boot.maven.PropertiesMergingResourceTransformer'`, 

这清楚地表明CCD_ 5的实现是找不到的。如果我使用<parent>标记中定义的Spring引导配置，它可以正常工作。

然而，如果我在maven shade插件配置中完全删除了PropertiesMergingResourceTransformer配置，那么捆绑的jar将无法执行，并给出如下异常：

`java.lang.IllegalArgumentException: No auto configuration classes found in META-INF/spring.factories. If you are using a custom packaging, make sure that file is correct.
at org.springframework.util.Assert.notEmpty(Assert.java:450) ~[myapp-1.0-SNAPSHOT.jar:na]
at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.getCandidateConfigurations(AutoConfigurationImportSelector.java:160) ~[myapp-1.0-SNAPSHOT.jar:na]
at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.selectImports(AutoConfigurationImportSelector.java:96) ~[myapp-1.0-SNAPSHOT.jar:na]`

有人能帮忙吗。

供参考：这是解决的maven shade插件问题：https://github.com/spring-projects/spring-boot/issues/11200

但它似乎只有在<parent>标签中配置了弹簧引导依赖项而不是在<dependencyManagement>中配置时才起作用

在尝试使用spring-boot-maven插件时，我在运行jar时遇到以下异常：

`Exception in thread "main" java.lang.IllegalStateException: Failed to get nested archive for entry BOOT-INF/lib/spring-boot-2.0.2.RELEASE.jar
at org.springframework.boot.loader.archive.JarFileArchive.getNestedArchive(JarFileArchive.java:108)
at org.springframework.boot.loader.archive.JarFileArchive.getNestedArchives(JarFileArchive.java:86)
at org.springframework.boot.loader.ExecutableArchiveLauncher.getClassPathArchives(ExecutableArchiveLauncher.java:70)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:49)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
Caused by: java.io.IOException: Unable to open nested jar file 'BOOT-INF/lib/spring-boot-2.0.2.RELEASE.jar'
at org.springframework.boot.loader.jar.JarFile.getNestedJarFile(JarFile.java:254)
at org.springframework.boot.loader.jar.JarFile.getNestedJarFile(JarFile.java:239)
at org.springframework.boot.loader.archive.JarFileArchive.getNestedArchive(JarFileArchive.java:103)
... 4 more
Caused by: java.lang.IllegalStateException: Unable to open nested entry 'BOOT-INF/lib/spring-boot-2.0.2.RELEASE.jar'. It has been compressed and nested jar files must be stored without compression. Please check the mechanism used to create your executable jar file
at org.springframework.boot.loader.jar.JarFile.createJarFileFromFileEntry(JarFile.java:282)
at org.springframework.boot.loader.jar.JarFile.createJarFileFromEntry(JarFile.java:262)
at org.springframework.boot.loader.jar.JarFile.getNestedJarFile(JarFile.java:250)
... 6 more`

Answer 1

希望您现在已经解决了这个问题，但在用同样的问题困扰了我几个小时后，我意识到需要将spring-boot-maven-plugin作为maven-shade-plugin的依赖项：

<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>${maven-shade-plugin.version}</version>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot.version}</version>
</dependency>
</dependencies>
<executions>
<execution>
<phase>package</phase>
<goals><goal>shade</goal></goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/spring.handlers</resource>
</transformer>
<transformer
implementation="org.springframework.boot.maven.PropertiesMergingResourceTransformer">
<resource>META-INF/spring.factories</resource>
</transformer>
<transformer
implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/spring.schemas</resource>
</transformer>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>${start-class}</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>

Answer 2

我在构建2.6.x Spring启动jar时，在2.3版本的maven shade插件中遇到了这个问题。我删除了maven shade插件配置中的显式版本声明，避免了这个问题。很可能我最初使用的是不兼容的maven阴影版本(2.3(