egit报错：cannot open git-upload-pack

1. 第一次通过eclipse导入github 项目，按照百度步骤进行操作，发现不能连接 github，cannot open git-upload-pack。

   

   

   1. 报错原因
      通过 eclipse 日志排查报错

      !MESSAGE https://github.com/making/spring-boot-jersey-blank.git: cannot open git-upload-pack
      !STACK 0
      org.eclipse.jgit.api.errors.TransportException: https://github.com/making/spring-boot-jersey-blank.git: cannot open git-upload-pack
          at org.eclipse.jgit.api.LsRemoteCommand.call(LsRemoteCommand.java:196)
          at org.eclipse.egit.core.op.ListRemoteOperation.run(ListRemoteOperation.java:99)
          at org.eclipse.egit.ui.internal.clone.SourceBranchPage$8.run(SourceBranchPage.java:324)
          at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
      Caused by: org.eclipse.jgit.errors.TransportException: https://github.com/making/spring-boot-jersey-blank.git: cannot open git-upload-pack
          at org.eclipse.jgit.transport.TransportHttp.connect(TransportHttp.java:499)
          at org.eclipse.jgit.transport.TransportHttp.openFetch(TransportHttp.java:308)
          at org.eclipse.jgit.api.LsRemoteCommand.call(LsRemoteCommand.java:175)
          ... 3 more
      Caused by: javax.net.ssl.SSLException: Received fatal alert: protocol_version
          at sun.security.ssl.Alerts.getSSLException(Unknown Source)
          at sun.security.ssl.Alerts.getSSLException(Unknown Source)
          at sun.security.ssl.SSLSocketImpl.recvAlert(Unknown Source)
          at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
          at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
          at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
          at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
          at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
          at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
          at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
          at java.net.HttpURLConnection.getResponseCode(Unknown Source)
          at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
          at org.eclipse.jgit.util.HttpSupport.response(HttpSupport.java:167)
          at org.eclipse.jgit.transport.TransportHttp.connect(TransportHttp.java:462)
          ... 5 more

      重点在于 : javax.net.ssl.SSLException: Received fatal alert: protocol_version , ssl 协议版本存在问题。
      在 github 的 Weak cryptographic standards removal notice 中有提到，取消 TLSv1/TLSv1.1 的连接方式，对于jdk1.7 的用户可以显示的进行配置，对于jdk1.6 的客户建议升级jdk版本，jdk1.8及以上版本支出 TLSV1.2，故不用配置。

   2. 解决方法
      我本地是1.7 需要进行相关的配置操作。
      操作： 在 eclipse.ini 文件的最后加上 -Dhttps.protocols=TLSv1,TLSv1.1,TLSv1.2（另起一行）