为依赖于其他项目的 Spring Boot 应用程序创建胖 jar 时出现异常

Question

这是我上一个问题的后续 Convert gradle multi project to springboot fat jar application

我有一个 http servlet 应用程序，它是一个多项目 gradle 构建，我的项目是一个包含 gradle HttpServlet 项目，它依赖于其他两个 gradle java 项目。我在 tomcat webapps/Web-INF/lib 目录中部署了所有 3 个 jar 并运行它。

现在有一个要求，我必须将我的应用程序转换为 Spring Boot 应用程序，而不是 3 个单独的 jar，我必须创建一个我应该运行它的胖 jar。

我的代码安排如下

    Rootrepository
      - settings.gradle 
     - build.gradle
      - Springboot project
         - build.gradle
         -src….
    - OtherGardleProject1
        - Src…
    - OtherGardleProject2
        - Src…

Please see `root project’s build.gradle`

version = '1.0.0'
group = ‘myproj’
apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'groovy'
apply plugin: 'eclipse'

subprojects {
    repositories {
        mavenCentral()
            }
    }

    apply plugin: 'java'

    sourceCompatibility = 1.8

    compileJava

    jar {
     from sourceSets.main.allSource
    }
}

subprojects.each { subproject ->
  evaluationDependsOn(subproject.path)
}


task mmJar(type: Jar, dependsOn: subprojects.jar) {
      manifest {
        attributes 'Main-Class': 'org.springframework.boot.loader.JarLauncher'
        attributes 'Start-Class': ‘mypackage.springboot.Application'
    }
  subprojects.each { subproject ->
    from subproject.configurations.archives.artifacts.files.collect {
      zipTree(it)
    }
  }
}


dependencies {
        compile 'junit:junit:4.12'
        compile 'org.slf4j:slf4j-api:1.7.7'
}

请看springboot projects’ build.gradle

buildscript {
    ext {
        spring_plugin_version = '2.1.1.RELEASE'
    }

    repositories {
        mavenCentral()
    }

    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:$spring_plugin_version")
        classpath "io.spring.gradle:dependency-management-plugin:1.0.3.RELEASE"

    }
}

apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'



dependencies {
    implementation('org.springframework.boot:spring-boot-starter-quartz')
    implementation('org.springframework.boot:spring-boot-starter-web')

    compile project(‘:otherproject1’)


    compile group: 'com.googlecode.json-simple', name: 'json-simple', version: '1.1'

    compile group: 'commons-io', name: 'commons-io', version: '2.4'
    compile('org.springframework:spring-webmvc')

    runtimeOnly('org.springframework.boot:spring-boot-devtools')
    compileOnly('org.projectlombok:lombok:1.18.8')
    annotationProcessor('org.projectlombok:lombok:1.18.8')

    testCompile('org.springframework.boot:spring-boot-starter-test')
}

然后我运行gradle clean assemble mmJar，它按预期创建了一个胖罐。

但是当我尝试运行java -jar build/libs/myproj-1.0.0.jar

Exception in thread "main" java.lang.IllegalStateException: Failed to get nested archive for entry BOOT-INF/lib/JavaEWAH-1.1.6.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/JavaEWAH-1.1.6.jar'
    at org.springframework.boot.loader.jar.JarFile.getNestedJarFile(JarFile.java:256)
    at org.springframework.boot.loader.jar.JarFile.getNestedJarFile(JarFile.java:241)
    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/JavaEWAH-1.1.6.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:284)
    at org.springframework.boot.loader.jar.JarFile.createJarFileFromEntry(JarFile.java:264)
    at org.springframework.boot.loader.jar.JarFile.getNestedJarFile(JarFile.java:252)
    ... 6 more

有人可以建议我做错了什么吗？

Answer 1

正如@M.Deinum 和我在链接帖子中所建议的那样，只需让 spring boot gradle 插件完成这项工作。在您的根文件夹中保留settings.gradle 文件并删除build.gradle。运行

gradle clean build

在Rootrepository 文件夹中。 Gradle 将构建 settings.gradle 中包含的项目，并在 Springboot project/build/libs 文件夹中创建 fat jar