方法一：打开%maven_home%\conf\setting.xml,仅仅会在新建项目时自己主动使用1.6的导入项目不会

在<profiles>标签内加入�例如以下配置：

<profile>

 <id>jdk-1.8</id>

 <activation>

  <activeByDefault>true</activeByDefault>

  <jdk>1.8</jdk>

 </activation>

 <properties>

  <maven.compiler.source>1.8</maven.compiler.source>

  <maven.compiler.target>1.8</maven.compiler.target>

  <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>

 </properties>

</profile>

方法二：不同的项目使用不同的jre，pom.xml里加入�例如以下配置

导入项目能够这样配置然后进行maven project update：

<build>

<plugins>

<plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-compiler-plugin</artifactId>

<configuration>

<source>1.8</source>

<target>1.8</target>

</configuration>

</plugin>

</plugins>

</build>

修正maven-dependency-plugin不支持m2e的问题：

<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-dependency-plugin

                                </artifactId>

                                <versionRange>

                                    [2.0,)

                                </versionRange>

                                <goals>

                                    <goal>unpack</goal>

                                </goals>

                            </pluginExecutionFilter>

                            <action>

                                <ignore></ignore>

                            </action>

                        </pluginExecution>

                    </pluginExecutions>

                </lifecycleMappingMetadata>

            </configuration>

        </plugin>

    </plugins>

</pluginManagement>