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本文详细介绍了如何使用Eclipse安装并配置Maven环境，包括下载Maven库、使用JDK而非JRE、设置setting.xml文件以正确连接远程仓库，并解决在更新版本时遇到的认证问题。通过将maven-compiler-plugin的版本从2.3.2更改为3.1，成功解决了项目构建失败的问题。

1. Install m2Eclipse

要使用下面这个link.

http://download.eclipse.org/technology/m2e/releases

apache-maven-3.2.3\lib\maven-model-builder-3.2.3.jar\org\apache\maven\model\pom-4.0.0.xml

  <repositories>
    <repository>
      <id>central</id>
      <name>Central Repository</name>
      <url>https://repo.maven.apache.org/maven2</url>
      <layout>default</layout>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </repository>
  </repositories>

  <pluginRepositories>
    <pluginRepository>
      <id>central</id>
      <name>Central Repository</name>
      <url>https://repo.maven.apache.org/maven2</url>
      <layout>default</layout>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
      <releases>
        <updatePolicy>never</updatePolicy>
      </releases>
    </pluginRepository>
  </pluginRepositories>

2. Maven 需要使用JDK,不能使用JRE.

3. setting.xml 中 server 元素的 id 必须与 POM 中需要谁的 repository 元素的 id 完全一致。正是此 id 将认证信息与仓库配置联系在一起。

settings.xml
  <servers>
    <server>
      <id>central</id>
      <username>repouser</username>
      <password>repopwd</password>
    </server>
  </servers>
  
pom-4.0.0
<project>
  <modelVersion>4.0.0</modelVersion>

  <repositories>
    <repository>
      <id>central</id>
      <name>Central Repository</name>
      <url>https://repo.maven.apache.org/maven2</url>
      <layout>default</layout>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </repository>
  </repositories>
</project>

4. Change version from 2.3.2 to 3.1, then problem sloved.

DescriptionResourcePathLocationType

Failure to transfer org.apache.maven.plugins:maven-compiler-plugin:pom:2.3.2 from https://hostname:8081/nexus/service/local/repositories/mavencentral/content was cached in the local repository, resolution will not be reattempted until the update interval of dsnexus-central has elapsed or updates are forced. Original error: Could not transfer artifact org.apache.maven.plugins:maven-compiler-plugin:pom:2.3.2 from/to dsnexus-central (https://hostname:8081/nexus/service/local/repositories/mavencentral/content): Access denied to https://hostname:8081/nexus/service/local/repositories/mavencentral/content/org/apache/maven/plugins/maven-compiler-plugin/2.3.2/maven-compiler-plugin-2.3.2.pom. Error code 401, Unauthorizedpom.xml/MavenTest2line 1Maven Configuration Problem

      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.1</version>
        <executions>
          <execution>
            <id>default-compile</id>
            <phase>compile</phase>
            <goals>
              <goal>compile</goal>
            </goals>
            <configuration>
              <source>1.6</source>
              <target>1.6</target>
            </configuration>
          </execution>
          <execution>
            <id>default-testCompile</id>
            <phase>test-compile</phase>
            <goals>
              <goal>testCompile</goal>
            </goals>
            <configuration>
              <source>1.6</source>
              <target>1.6</target>
            </configuration>
          </execution>
        </executions>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>