SpringBoot——Failed to execute goal org.springframework.boot:spring-boot-maven-plugin

阳光穿透心脏的1/2处 2021-10-25 14:56 561阅读 0赞

一、问题：springboot项目打jar包报错

  1. [ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.1.7.RELEASE:repackage (repackage) on project model: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.1.7.RELEASE:repackage failed: Unable to find main class -> [Help 1]
  2. [ERROR] 
  3. [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
  4. [ERROR] Re-run Maven using the -X switch to enable full debug logging.
  5. [ERROR] 
  6. [ERROR] For more information about the errors and possible solutions, please read the following articles:
  7. [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
  8. [ERROR] 
  9. [ERROR] After correcting the problems, you can resume the build with the command
  10. [ERROR]   mvn <goals> -rf :model

二、解决方案一

1、错误原因：

我已经设置了启动类，又在pom中引入了spring-boot-maven-plugin

image.png

image.png

2、解决：

保留启动类，将pom中引入的spring-boot-maven-plugin换成普通的_maven-plugin_
_

3、注意：

此方案是我在其他博客上看到的，确实能解决打包不成功问题，但是打包可能成功了，但是运行jar包时，会报另外一个错“xxx.war中没有注清单属性”，还是需要引入spring-boot-maven-plugin，怎么办呢？请见方案二

三、解决方案二

1、在根pom文件中加入：

  1. <pluginRepositories>
  2.         <pluginRepository>
  3.             <id>spring-snapshots</id>
  4.             <url>https://repo.spring.io/snapshot</url>
  5.         </pluginRepository>
  6.         <pluginRepository>
  7.             <id>spring-milestones</id>
  8.             <url>https://repo.spring.io/milestone</url>
  9.         </pluginRepository>
  10.     </pluginRepositories>

2、将根pom文件中的spring-boot-maven-plugin移到web层

  1. <build>
  2.         <plugins>
  3.             <plugin>
  4.                 <groupId>org.springframework.boot</groupId>
  5.                 <artifactId>spring-boot-maven-plugin</artifactId>
  6.                 <configuration>
  7.                     <mainClass>com.whm.SpringbootTestApplication</mainClass>
  8.                 </configuration>
  9.             </plugin>
  10.         </plugins>
  11.   </build>

四、启动方式

1、jar启动

  1. java -jar web-0.0.1-SNAPSHOT.jar

2、war启动

先打war包，没有web.xml的项目如何打war包呢？

  1. <packaging>war</packaging>
  3. <build>
  4.         <plugins>
  5.             <plugin>
  6.                 <artifactId>maven-war-plugin</artifactId>
  7.                 <configuration>
  8.                     <failOnMissingWebXml>false</failOnMissingWebXml>
  9.                 </configuration>
  10.             </plugin>
  11.             <plugin>
  12.                 <groupId>org.springframework.boot</groupId>
  13.                 <artifactId>spring-boot-maven-plugin</artifactId>
  14.                 <configuration>
  15.                     <mainClass>whm.SpringbootTestApplication</mainClass>
  16.                 </configuration>
  17.             </plugin>
  18.         </plugins>
  19.  </build>

启动war包

  1. java -jar web-0.0.1-SNAPSHOT.war

3、目录启动

将 web-0.0.1-SNAPSHOT.jar解压，进入解压后的目录web-0.0.1-SNAPSHOT，里面会有两文件夹，进入META-INF文件夹，打开MANIFEST.MF

  1. Manifest-Version: 1.0
  2. Implementation-Title: web
  3. Implementation-Version: 0.0.1-SNAPSHOT
  4. Start-Class: whm.SpringbootTestApplication
  5. Spring-Boot-Classes: BOOT-INF/classes/
  6. Spring-Boot-Lib: BOOT-INF/lib/
  7. Build-Jdk-Spec: 1.8
  8. Spring-Boot-Version: 2.1.7.RELEASE
  9. Created-By: Maven Archiver 3.4.0
  10. Main-Class: org.springframework.boot.loader.JarLauncher

启动org.springframework.boot.loader.JarLauncher

  1. java org.springframework.boot.loader.JarLauncher

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