eclipse版本是luna 4.4.2，先用的在线安装，装到一半弹出个框，忘截图了，不过复制下了错误信息：
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://dist.springsource.com/release/TOOLS/update/3.6.4.RELEASE/e4.4/plugins/org.springframework.data.core.source_1.9.1.20150106-RELEASE.jar.
Read timed out
Unable to read repository at http://dist.springsource.com/release/TOOLS/update/3.6.4.RELEASE/e4.4/plugins/org.springframework.ide.eclipse.maven.source_3.6.4.201503051146-RELEASE.jar.
Read timed out
Unable to read repository at http://dist.springsource.com/release/TOOLS/update/3.6.4.RELEASE/e4.4/plugins/org.springframework.ide.eclipse.osgi.targetdefinition_3.6.4.201503051146-RELEASE.jar.
Read timed out
然后采用离线安装，还是不行，一直卡在那不动，截了个图如下：
