將SpringBoot配置添加為時如何使用maven-shade-plugin的“PropertiesMergingResourceTransformer”<dependencymanagement> 標簽</dependencymanagement>

Question

我正在使用 maven-shade-plugin 和 Sprint Boot。 我已將 spring-boot 依賴項定義為：

<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>

我已經在 pom.xml 的<parent>標記中定義了我的項目特定 uber-pom，因此無法在<parent> parent> 標記中使用spring-boot-starter-parent 。

現在，當我執行mvn clean install時，出現以下異常：

`[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'`, 

這清楚地表明無法找到PropertiesMergingResourceTransformer的實現。 如果我使用<parent>標簽中定義的 Spring-boot 配置，它工作正常。

但是，如果我完全刪除了 maven-shade-plugin 配置中的PropertiesMergingResourceTransformer配置，那么捆綁的 jar 將無法執行，並給出如下異常：

`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]`

有人可以幫忙嗎？

供參考：這是已解決的 maven-shade-plugin 問題： https://github.com/spring-projects/spring-boot/issues/11200

但它似乎只有在 spring-boot 依賴項配置在<parent>標簽而不是在<dependencyManagement>

在嘗試使用 spring-boot-maven-plugin 時，我在運行 jar 時遇到異常：

`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

希望您現在已經解決了這個問題，但是在同樣的問題上敲了幾個小時之后，我意識到需要包含spring-boot-maven-plugin作為對maven-shade-plugin的依賴：

<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

在構建 2.6.x Spring 啟動 jar 時，我在 maven 陰影插件的 2.3 版本中遇到了這個問題。 我刪除了 maven 陰影插件配置中的顯式版本聲明，並且避免了該問題。 很可能我最初使用的是不兼容的 maven 陰影版本（2.3）