常用开源下载地址

maven各个版本下载地址：

https://archive.apache.org/dist/maven/maven-3/

IK-Analyzer-2012FF下载地址：

https://gitee.com/wltea/IK-Analyzer-2012FF

solr各个版本下载地址：

http://archive.apache.org/dist/lucene/solr/
mycat

https://github.com/MyCATApache/Mycat-download/blob/master/1.4-RELEASE/Mycat-server-1.4-release-20151019230038-linux.tar.gz

Logstash各个版本下载地址：

https://artifacts.elastic.co/downloads/logstash/logstash-5.6.8.zip