maven install之後報的錯誤如下：

[INFO] Scanning for projects...
[INFO] Downloading: http://xxx.xxx.xxx.xxx:xxxx/nexus/content/groups/public/DubboDemo/DubboDemo/1.0-SNAPSHOT/maven-metadata.xml
[INFO] Downloading: http://xxx.xxx.xxx.xxx:xxxx/nexus/content/groups/public/DubboDemo/DubboDemo/1.0-SNAPSHOT/maven-metadata.xml
[WARNING] 
[WARNING] Some problems were encountered while
 
 building the effective model for DubboDemo:dubbo-api:war:1.0-SNAPSHOT
[WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: junit:junit:jar -> version 3.8.1 vs 4.11 @ DubboDemo:DubboDemo:1.0-SNAPSHOT, D:\java\maven\maven_store\DubboDemo\DubboDemo\1.0-SNAPSHOT\DubboDemo-1.0
 
-SNAPSHOT.pom, line 59, column 17
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING] 
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building dubbo-api Maven Webapp 1.0
 
-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for io.netty:netty:jar:3.10.5.Final is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ dubbo-api ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ dubbo-api ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:\java\Workspaces\MyEclipse\dubbo-api\target\classes
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.441 s
[INFO] Finished at: 2017-07-26T16:39:58+08:00
[INFO] Final Memory: 7M/17M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project dubbo-api: Fatal error compiling: 無效的目標版本： 1.8 -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

解決辦法：

pom.xml檔案中加入如下配置：

<build>
    <plugins>
    <!-- 解決本地的編譯問題：maven找不到jdk 將jre中的這兩個jar複製到jdk中 -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
                <compilerArguments>
                    <verbose />
                    <bootclasspath>${java.home}/lib/rt.jar;${java.home}/lib/jce.jar</bootclasspath>
                </compilerArguments>
            </configuration>
        </plugin>
    </plugins>
</build>