我的是eclipse 4.6.2 ，安装包应该没问题，就是死活装不上
错误详情：
An error occurred while collecting items to be installed
session context was:(profile=D__Program Files (x86)_esclips_eclipse, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,ch.qos.logback.classic,1.1.2.v20160208-0839
No repository found containing: osgi.bundle,ch.qos.logback.core,1.1.2.v20160208-0839
No repository found containing: osgi.bundle,ch.qos.logback.slf4j,1.1.2.v20160301-0943
No repository found containing: osgi.bundle,com.fasterxml.jackson.core.jackson-annotations,2.8.7
No repository found containing: osgi.bundle,com.fasterxml.jackson.core.jackson-core,2.8.7
No repository found containing: osgi.bundle,com.fasterxml.jackson.core.jackson-databind,2.8.7
No repository found containing: osgi.bundle,org.codehaus.jackson.core,1.9.13
No repository found containing: osgi.bundle,org.codehaus.jackson.mapper,1.9.13
Multiple problems occurred while downloading.
Unknown Host: http://download.eclipse.org/releases/neon/201703231000/plugins/org.eclipse.zest.core_1.5.300.201606061308.jar.pack.gz
download.eclipse.org
Unknown Host: http://download.eclipse.org/releases/neon/201703231000/plugins/org.eclipse.zest.core_1.5.300.201606061308.jar
download.eclipse.org
Multiple problems occurred while downloading.
Unknown Host: http://download.eclipse.org/releases/neon/201703231000/plugins/org.eclipse.zest.layouts_1.1.300.201606061308.jar.pack.gz
download.eclipse.org
Unknown Host: http://download.eclipse.org/releases/neon/201703231000/plugins/org.eclipse.zest.layouts_1.1.300.201606061308.jar
download.eclipse.org
Multiple problems occurred while downloading.
Unknown Host: http://download.eclipse.org/releases/neon/201703231000/plugins/org.json_1.0.0.v201011060100.jar.pack.gz
download.eclipse.org
Unknown Host: http://download.eclipse.org/releases/neon/201703231000/plugins/org.json_1.0.0.v201011060100.jar
download.eclipse.org
No repository found containing: osgi.bundle,org.slf4j.api,1.7.10.v20170224-1220
求高手解答，谢谢大家
