Question

用eclipse创建一个maven管理的项目，创建完成后pom.xml报错！！急求怎么解决！！

Multiple annotations found at this line:
- Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:
2.3.2:compile (execution: default-compile, phase: compile)
- CoreException: Could not get the value for parameter compilerId for plugin execution default-compile:
PluginResolutionException: Plugin org.apache.maven.plugins:maven-compiler-plugin:2.3.2 or one of its dependencies
could not be resolved: Failure to transfer org.codehaus.plexus:plexus-compiler-javac:jar:1.8.1 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.codehaus.plexus:plexus-compiler-javac:jar:1.8.1 from/to central (http://repo.maven.apache.org/maven2):
java.io.IOException: Remotely Closed [id: 0x5aaf85a3, /192.168.1.114:52094 :> repo.maven.apache.org/103.245.222.184:80]
- CoreException: Could not get the value for parameter compilerId for plugin execution default-testCompile:
PluginResolutionException: Plugin org.apache.maven.plugins:maven-compiler-plugin:2.3.2 or one of its dependencies
could not be resolved: Failure to transfer org.codehaus.plexus:plexus-compiler-javac:jar:1.8.1 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.codehaus.plexus:plexus-compiler-javac:jar:1.8.1 from/to central (http://repo.maven.apache.org/maven2):
java.io.IOException: Remotely Closed [id: 0x5aaf85a3, /192.168.1.114:52094 :> repo.maven.apache.org/103.245.222.184:80]
- Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:
2.3.2:testCompile (execution: default-testCompile, phase: test-compile)

Answer 1

有多种情况会导致这种报错，可以尝试以下5个方法：
1.项目右键：maven>install

2.项目右键：maven>clean
3.删除对应jar在仓库中的文件夹
4.在pom.xml中添加镜像地址：
<dependency>
<groupId></groupId>
<artifactId></artifactId>
<version></version>
</dependency>
=========以上4个方法结束后，项目右键>maven>update project
5.如果下载成功，仍然报错：
项目右键：maven>update project,勾选Force Update of Snapshots/Releases

Answer 2

更新一下项目

追问

怎么更新？