我试图在我的计算机上安装Eclipse Oxygen 64bits，并在开始安装时出现错误。错误如下：
内部错误： TLS SSL上下文不可用
点击好的butten后，安装关闭。 错误的详细信息如下：
org.apache.http.conn.ssl.SSLInitializationException: TLS SSLContext not available
at org.apache.http.conn.ssl.SSLContexts.createDefault(SSLContexts.java:61)
at org.apache.http.conn.ssl.SSLContexts.createSystemDefault(SSLContexts.java:80)
at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransferFactory.newInstance(HttpClientRetrieveFileTransferFactory.java:27)
at org.eclipse.ecf.internal.provider.filetransfer.Activator.getFileTransfer(Activator.java:608)
at org.eclipse.ecf.provider.filetransfer.retrieve.MultiProtocolRetrieveAdapter.sendRetrieveRequest(MultiProtocolRetrieveAdapter.java:92)
at org.eclipse.oomph.setup.internal.core.util.ECFURIHandlerImpl$InputStreamConnectionHandler.sendConnectionRequest(ECFURIHandlerImpl.java:1641)
at org.eclipse.oomph.setup.internal.core.util.ECFURIHandlerImpl$ConnectionHandler.process(ECFURIHandlerImpl.java:1392)
at org.eclipse.oomph.setup.internal.core.util.ECFURIHandlerImpl.createInputStream(ECFURIHandlerImpl.java:303)
at org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl.createInputStream(ExtensibleURIConverterImpl.java:360)
at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1269)
at org.eclipse.oomph.setup.internal.core.util.SetupCoreUtil.handleArchiveRedirection(SetupCoreUtil.java:549)
at org.eclipse.oomph.setup.internal.core.util.SetupCoreUtil.configureResourceSet(SetupCoreUtil.java:348)
at org.eclipse.oomph.setup.internal.core.util.SetupCoreUtil.configureResourceSet(SetupCoreUtil.java:174)
at org.eclipse.oomph.setup.internal.core.util.SetupCoreUtil.createResourceSet(SetupCoreUtil.java:168)
at org.eclipse.oomph.setup.ui.wizards.SetupWizard.<init>(SetupWizard.java:167)
at org.eclipse.oomph.setup.ui.wizards.SetupWizard.<init>(SetupWizard.java:159)
at org.eclipse.oomph.setup.internal.installer.Installer.<init>(Installer.java:40)
at org.eclipse.oomph.setup.internal.installer.InstallerApplication.run(InstallerApplication.java:222)
at org.eclipse.oomph.setup.internal.installer.InstallerApplication.start(InstallerApplication.java:408)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
Caused by: java.security.NoSuchAlgorithmException: TLS SSLContext not available
at sun.security.jca.GetInstance.getInstance(Unknown Source)
at javax.net.ssl.SSLContext.getInstance(Unknown Source)
at org.apache.http.conn.ssl.SSLContexts.createDefault(SSLContexts.java:57)
... 30 more
希望你能帮帮我，谢谢。