Eclipse爲maven編譯階段拋出錯誤？

Question

項目是不能執行的Maven生命週期映射兩個生命週期階段：

1. 編譯：編譯
2. 編譯：testcompile

以下是錯誤的日食：

1. CoreException: Could not calculate build plan: Plugin org.apache.maven.plugins:maven-compiler-plugin:2.5.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-compiler-plugin:jar:2.5.1: ArtifactResolutionException: Failure to transfer org.apache.maven.plugins:maven-compiler-plugin:pom:2.5.1 from http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.apache.maven.plugins:maven-compiler-plugin:pom:2.5.1 from/to central (http://repo.maven.apache.org/maven2): repo.maven.apache.org
   pom.xml /ex line 1 Maven Project Build Lifecycle Mapping Problem

2. Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (execution: default-compile, phase: compile) pom.xml
   /ex line 1 Maven Project Build Lifecycle Mapping Problem

3. Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:2.5.1:testCompile (execution: default-testCompile, phase: test-compile)
   pom.xml /ex line 1 Maven Project Build Lifecycle Mapping Problem

Answer 1

在

蝕轉到Windows的>首選項 - > maven->用戶設置

點的用戶設置的文本框以％M2_HOME％\ CONF

Answer 2

if its not working still then you need to add plugins in the POM.xml and update project 

<build> 
    <plugins> 
     <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <artifactId>maven-surefire-plugin</artifactId> 
       <version>2.20</version> 
       <configuration> 
        <suiteXmlFiles> 
          <suiteXmlFile>testng.xml</suiteXmlFile> 
        </suiteXmlFiles> 
       </configuration> 
      </plugin> 
      <plugin> 
      <groupId>org.apache.maven.plugins</groupId> 
      <artifactId>maven-compiler-plugin</artifactId> 
      <version>3.6.2</version> 
      <configuration> 
       <source>1.8</source> 
       <target>1.8</target> 
     </configuration> 
     </plugin> 
    </plugins> 
</build>