我似乎有一个依赖/插件的 pom.xml 文件错误,我通过将项目转换为 Maven 生成了这个 pom.xml 文件,然后 Maven 只生成了这个 pom 文件。查看下面的错误代码。根据Eclipse STS(Java Spring),Java代码本身不包含错误,java代码中导入所需的所有jar文件都已导入。
运行Java程序时控制台错误打印:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.springframework.boot.SpringApplication.<clinit>(SpringApplication.java:190)
at testingpushnotifications.Application.main(Application.java:10)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 2 more
pom.xml 文件显示 Java spring 项目中的错误。
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>Spring-Android-Push-Notifications-FCM--master</groupId>
<artifactId>Spring-Android-Push-Notifications-FCM--master</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin> <--- ERROR HERE
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
<configuration>
<source/>
<target/>
</configuration>
</plugin>
</plugins>
</build>
</project>
第 1 行还有一个红色的大 X。
上面代码@第 16 行的错误日志:'plugin'
Multiple annotations found at this line:
- Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:3.5.1:compile
(execution: default-compile, phase: compile)
- CoreException: Could not calculate build plan: Plugin org.apache.maven.plugins:maven-compiler-plugin:3.5.1 or one of its
dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-compiler-plugin:jar:3.5.1:
ArtifactResolutionException: Could not transfer artifact org.apache.maven.plugins:maven-compiler-plugin:pom:3.5.1 from/to central
(https://repo.maven.apache.org/maven2): NullPointerException
- Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:3.5.1:testCompile
(execution: default-testCompile, phase: test-compile)
POM.XML 文件第 16 行错误
CoreException: Could not calculate build plan: Plugin org.apache.maven.plugins:maven-compiler-plugin:3.5.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-compiler-plugin:jar:3.5.1: ArtifactResolutionException: Could not transfer artifact org.apache.maven.plugins:maven-compiler-plugin:pom:3.5.1 from/to central (https://repo.maven.apache.org/maven2): NullPointerException pom.xml /Spring-Android-Push-Notifications-FCM--master line 16 Maven Project Build Lifecycle Mapping Problem
根据添加依赖项的注释进行编辑;结果 = 剩余错误仍未解决,没有新错误。
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>Spring-Android-Push-Notifications-FCM--master</groupId>
<artifactId>Spring-Android-Push-Notifications-FCM--master</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
</configuration>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>
org.apache.maven.plugins
</groupId>
<artifactId>
maven-compiler-plugin
</artifactId>
<versionRange>
[3.5.1,)
</versionRange>
<goals>
<goal>compile</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore></ignore>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
最佳答案
您把 <dependency>
放在了错误的位置标签,它必须位于 <dependencies>
内标签,它不在 <build>
内标签,但应该是这样的
....
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
<build>
.....
关于java - 由于依赖项和/或插件而导致 pom.xml 文件错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43287937/