Activity安装报错的解决方法

我的eclipse在安装Activity插件的时候，一直安装报错，经过百度之后，发现应该是eclipse缺少jar包

报错信息：

An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Unable to read repository at  http://activiti.org/designer/update/plugins/org.activiti.designer.libs_5.18.0.201508100929.jar.
Read timed out

An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Unable to read repository at http://activiti.org/designer/update/plugins/org.activiti.designer.libs_5.18.0.201508100929.jar.
Read timed out

........省略

应该是这个版本的eclipse缺少jar包，下载缺少的jar包之后，重新安装就行了。

jar下载地址： https://download.csdn.net/download/xhbsss/10395637