有时候使用maven打包时会出现如下：

[ERROR] Plugin org.apache.maven.plugins:maven-surefire-plugin:2.22.1 or one of its dependencies could not be resolved: Cannot access nexus (http://maven.aliyun.com/nexus/content/groups/public) in offline mode and the artifact org.apache.maven.plugins:maven-surefire-plugin:jar:2.22.1 has not been downloaded from it before. -> [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/PluginResolutionException

pom.xml添加如下：

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <executable>true</executable>
                    <includeSystemScope>true</includeSystemScope>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.1</version>
                <configuration>
                    <skipTests>true</skipTests>
                </configuration>
            </plugin>
        </plugins>
    </build>

删除多余的版本：

构建成功！