WebMagic源码导入Eclipse的时候出现的问题

[DiamonJ]

我按照http://webmagic.io/docs/zh/posts/ch3-build-source/import-project.html教程操作。
我使用m2e插件，没有直接使用maven添加依赖，可能是m2e插件安装的问题，比如webmagic-core中pom的一个问题

Makers里面maven problem 会有类似的错误：
Description Resource Path Location Type
Failure to transfer org.apache.maven.plugins:maven-enforcer-plugin:pom:1.0 from https://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.apache.maven.plugins:maven-enforcer-plugin:pom:1.0 from/to central (https://repo.maven.apache.org/maven2): Remote host closed connection during handshake pom.xml /forger line 1 Maven pom Loading Problem
请问在导入WebMagic源码的时候具体过程在http://webmagic.io/docs/zh/posts/ch3-build-source/import-project.html基础上还需要注意什么问题，为什么会出现以上的错误