Spring Boot Maven - 無法將Web應用程序打包爲可執行的jar/war

我正試圖學習如何使用Spring Boot和MVC構建Web應用程序。Spring Boot Maven - 無法將Web應用程序打包爲可執行的jar/war

我能夠創建一個Spring啓動應用程序，並通過執行我的SpringBootWebApplication類中的main方法從我的Eclipse中運行它。它工作正常，我可以通過點擊http://localhost:8080來啓動我的應用程序。

現在，我想打包我的應用程序作爲一個可執行的WAR或JAR（我不知道哪一個是正確的！）。要做到這一點，我在pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>org.sriram</groupId> 
    <artifactId>springboot</artifactId> 
    <packaging>war</packaging> 
    <version>0.0.1-SNAPSHOT</version> 
    <name>springboot Maven Webapp</name> 
    <url>http://maven.apache.org</url> 
    <parent> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-parent</artifactId> 
     <version>1.5.1.RELEASE</version> 
    </parent> 

    <properties> 
     <java.version>1.8</java.version> 
    </properties> 

    <dependencies> 
     <!-- Web --> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-web</artifactId> 
     </dependency> 
     <!-- Tomcat Embed --> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-tomcat</artifactId> 
      <scope>provided</scope> 
     </dependency> 
     <!-- JSTL --> 
     <dependency> 
      <groupId>javax.servlet</groupId> 
      <artifactId>jstl</artifactId> 
     </dependency> 
     <!-- To compile JSP files --> 
     <dependency> 
      <groupId>org.apache.tomcat.embed</groupId> 
      <artifactId>tomcat-embed-jasper</artifactId> 
      <scope>provided</scope> 
     </dependency> 
    </dependencies> 


    <build> 
     <plugins> 
      <!-- Package as an executable jar/war --> 
      <plugin> 
       <groupId>org.springframework.boot</groupId> 
       <artifactId>spring-boot-maven-plugin</artifactId> 
      </plugin> 
     </plugins> 
    </build> 
</project>

爲了記錄增加了一個叫做spring-boot-maven-plugin生成插件，我創建了一個基於教程here

當我從命令提示符下運行mvn clean package -e這個POM，我得到一個錯誤如下所示：

[INFO] Error stacktraces are turned on. 
[INFO] Scanning for projects... 
[INFO] 
[INFO] ------------------------------------------------------------------------ 
[INFO] Building springboot Maven Webapp 0.0.1-SNAPSHOT 
[INFO] ------------------------------------------------------------------------ 
[WARNING] The POM for org.springframework.boot:spring-boot-maven-plugin:jar:1.5.1.RELEASE is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details 
[INFO] ------------------------------------------------------------------------ 
[INFO] BUILD FAILURE 
[INFO] ------------------------------------------------------------------------ 
[INFO] Total time: 0.890 s 
[INFO] Finished at: 2017-08-01T13:03:42+05:30 
[INFO] Final Memory: 8M/184M 
[INFO] ------------------------------------------------------------------------ 
[ERROR] Plugin org.springframework.boot:spring-boot-maven-plugin:1.5.1.RELEASE or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.springframework.boot:spring-boot-maven-plugin:jar:1.5.1.RELEASE: 1 problem was encountered while building the effective model for org.springframework.boot:spring-boot-maven-plugin:[unknown-version] 
[ERROR] [FATAL] Non-parseable POM C:\Users\Sriram\.m2\repository\org\springframework\boot\spring-boot-parent\1.5.1.RELEASE\spring-boot-parent-1.5.1.RELEASE.pom: in epilog non whitespace content is not allowed but got r (position: END_TAG seen ...</profiles>\n</project>\nr... @946:2) @ C:\Users\Sriram\.m2\repository\org\springframework\boot\spring-boot-parent\1.5.1.RELEASE\spring-boot-parent-1.5.1.RELEASE.pom, line 946, column 2 
[ERROR] -> [Help 1] 
org.apache.maven.plugin.PluginResolutionException: Plugin org.springframework.boot:spring-boot-maven-plugin:1.5.1.RELEASE or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.springframework.boot:spring-boot-maven-plugin:jar:1.5.1.RELEASE 
     at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:117) 
     at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getPluginDescriptor(DefaultMavenPluginManager.java:181) 
     at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getMojoDescriptor(DefaultMavenPluginManager.java:286) 
     at org.apache.maven.plugin.DefaultBuildPluginManager.getMojoDescriptor(DefaultBuildPluginManager.java:241) 
     at org.apache.maven.lifecycle.internal.DefaultLifecycleMappingDelegate.calculateLifecycleMappings(DefaultLifecycleMappingDelegate.java:110) 
     at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.calculateLifecycleMappings(DefaultLifecycleExecutionPlanCalculator.java:266) 
     at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.calculateMojoExecutions(DefaultLifecycleExecutionPlanCalculator.java:217) 
     at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.calculateExecutionPlan(DefaultLifecycleExecutionPlanCalculator.java:127) 
     at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.calculateExecutionPlan(DefaultLifecycleExecutionPlanCalculator.java:145) 
     at org.apache.maven.lifecycle.internal.builder.BuilderCommon.resolveBuildPlan(BuilderCommon.java:96) 
     at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:110) 
     at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81) 
     at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51) 
     at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128) 
     at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:309) 
     at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:194) 
     at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:107) 
     at org.apache.maven.cli.MavenCli.execute(MavenCli.java:993) 
     at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:345) 
     at org.apache.maven.cli.MavenCli.main(MavenCli.java:191) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
     at java.lang.reflect.Method.invoke(Method.java:498) 
     at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289) 
     at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229) 
     at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415) 
     at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356) 
Caused by: org.eclipse.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for org.springframework.boot:spring-boot-maven-plugin:jar:1.5.1.RELEASE 
     at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:339) 
     at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:199) 
     at org.eclipse.aether.internal.impl.DefaultRepositorySystem.readArtifactDescriptor(DefaultRepositorySystem.java:296) 
     at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:103) 
     ... 27 more 
Caused by: org.apache.maven.model.building.ModelBuildingException: 1 problem was encountered while building the effective model for org.springframework.boot:spring-boot-maven-plugin:[unknown-version] 
[FATAL] Non-parseable POM C:\Users\Sriram\.m2\repository\org\springframework\boot\spring-boot-parent\1.5.1.RELEASE\spring-boot-parent-1.5.1.RELEASE.pom: in epilog non whitespace content is not allowed but got r (position: END_TAG seen ...</profiles>\n</project>\nr... @946:2) @ C:\Users\Sriram\.m2\repository\org\springframework\boot\spring-boot-parent\1.5.1.RELEASE\spring-boot-parent-1.5.1.RELEASE.pom, line 946, column 2 

     at org.apache.maven.model.building.DefaultModelProblemCollector.newModelBuildingException(DefaultModelProblemCollector.java:197) 
     at org.apache.maven.model.building.DefaultModelBuilder.readModel(DefaultModelBuilder.java:581) 
     at org.apache.maven.model.building.DefaultModelBuilder.readParentExternally(DefaultModelBuilder.java:1097) 
     at org.apache.maven.model.building.DefaultModelBuilder.readParent(DefaultModelBuilder.java:829) 
     at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:331) 
     at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:321) 
     ... 30 more 
[ERROR] 
[ERROR] Re-run Maven using the -X switch to enable full debug logging. 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles: 
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException

我沒有從我的源代碼中得到任何編譯錯誤。考慮到當我在eclipse中運行主要方法時，我的應用程序能夠啓動，爲什麼我的Maven包裝不起作用？我可以找出以下幾點：基於堆棧跟蹤

，我打開了該文件C：\用戶\ Sriram.m2 \庫\組織\ springframework的\啓動\彈簧引導家長\ 1.5.1.RELEASE \ spring-boot-parent-1.5.1.RELEASE.pom使用記事本+ +，它確實有一些錯誤 - 我的意思是XML似乎格式不正確，Notepad ++也拋出了一個解析錯誤。

雖然我可以看出這是問題，但我不確定XML是如何在由我的Maven Pom自動設置的情況下最終損壞的。我錯過了什麼？

感謝，斯利拉姆

來源

2017-08-01 sriramsridharan

嘗試從本地存儲庫中刪除它，然後再試一次 –

好了，正如我在對畸形的春天提問時表示-boot-parent-1.5.1.RELEASE.pom文件，結果證明XML文檔末尾有一些內容是不可解析的。我從POM中刪除了額外的內容並保存，並且該包成功。但我不明白的是，POM怎麼可能最終變得格格不入呢？這可能是一個網絡問題或什麼？ – sriramsridharan

你（至少）兩兩件事來糾正。

第一：你的Maven構建失敗：

[FATAL]非解析的POM C：\用戶\ Sriram.m2 \庫\組織\ springframework的\啓動\彈簧引導家長\ 1.5.1.RELEASE \ spring-boot-parent-1.5.1.RELEASE.pom： in epilog非空白內容不允許，但得到r（位置： END_TAG見過... \ n \ nr ... @ 946 ：2）@ C：\ Users \ Sriram.m2 \ repository \ org \ springframework \ boot \ spring-boot-parent \ 1.5.1.RELEASE \ spring-boot-parent-1.5.1.RELEASE.pom， line 946，第2欄

原因不是你的實際pom，而是spring-boot-parent-1.5.1.RELEASE.pom依賴關係，似乎損壞。
因此，首先刪除C:\Users\Sriram.m2\repository\org\springframework\boot\spring-boot-parent\1.5.1.RELEASE\文件夾並重新啓動構建以下載它。

問題二：創建一個可執行的JAR或戰爭，你必須使用 spring-boot:repackage目標。

從plugin documentation：

重新包裝：創建一個jar或war文件，它是自動執行。它可以用替換常規工件，或者可以使用單獨的分類器附加到生成生命週期。

在你的pom中，你沒有指定repackage的目標。
您只指定spring-boot-maven-plugin：

<build> 
    <plugins> 
     <!-- Package as an executable jar/war --> 
     <plugin> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-maven-plugin</artifactId> 
     </plugin> 
    </plugins> 
</build>

因此，通過替換它：

<build> 
    <plugins> 
     <!-- Package as an executable jar/war --> 
     <plugin> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-maven-plugin</artifactId>   
      <executions> 
       <execution> 
       <goals> 
        <goal>repackage</goal> 
       </goals> 
       </execution> 
      </executions> 
     </plugin> 
    </plugins> 
</build>

來源

2017-08-01 07:47:19 davidxxx

你的第二點不正確 –

啊。你能解釋一下嗎？ – davidxxx

在我所有的項目中，我沒有指定目標，我可以將它們打包，檢查彈簧啓動的spring.io指南，目標不是必需的 –

Spring Boot Maven - 無法將Web應用程序打包爲可執行的jar/war

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